Merge 23534 into default.

author: Simon MacMullen <simon@rabbitmq.com> 2011-01-24 10:36:49 +0000
committer: Simon MacMullen <simon@rabbitmq.com> 2011-01-24 10:36:49 +0000
commit: cd9c9debea1972307c0678f80fa7007ea7551a92 (patch)
tree: 494914aa959368578f05bc43b8276e55c044ffa7
parent: 5f7240e024f5566f8e62beef4a78f0cdfdc34990 (diff)
parent: 9fd4bf7fa666ea4b7763f676bc00663a42667997 (diff)
download: rabbitmq-server-cd9c9debea1972307c0678f80fa7007ea7551a92.tar.gz
117 files changed, 4514 insertions, 5167 deletions
diff --git a/LICENSE-MPL-RabbitMQ b/LICENSE-MPL-RabbitMQ
index 221c9350..14bcc21d 100644
--- a/LICENSE-MPL-RabbitMQ
+++ b/LICENSE-MPL-RabbitMQ
@@ -446,28 +446,10 @@ EXHIBIT A -Mozilla Public License.
 
      The Original Code is RabbitMQ.
 
-     The Initial Developers of the Original Code are LShift Ltd,
-     Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-
-     Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-     Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-     are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-     Technologies LLC, and Rabbit Technologies Ltd.
-
-     Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-     Ltd. Portions created by Cohesive Financial Technologies LLC are
-     Copyright (C) 2007-2010 Cohesive Financial Technologies
-     LLC. Portions created by Rabbit Technologies Ltd are Copyright
-     (C) 2007-2010 Rabbit Technologies Ltd.
-
-     All Rights Reserved.
-
-     Contributor(s): ______________________________________.''
+     The Initial Developer of the Original Code is VMware, Inc.
+     Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.''
 
      [NOTE: The text of this Exhibit A may differ slightly from the text of
      the notices in the Source Code files of the Original Code. You should
      use the text of this Exhibit A rather than the text found in the
      Original Code Source Code for Your Modifications.]
-
-
-
diff --git a/Makefile b/Makefile
index d3f052f6..00bfd629 100644
--- a/Makefile
+++ b/Makefile
@@ -170,7 +170,7 @@ start-background-node:
 	$(BASIC_SCRIPT_ENVIRONMENT_SETTINGS) \
 		RABBITMQ_NODE_ONLY=true \
 		RABBITMQ_SERVER_START_ARGS="$(RABBITMQ_SERVER_START_ARGS) -detached" \
-		./scripts/rabbitmq-server ; sleep 1
+		./scripts/rabbitmq-server; sleep 1
 
 start-rabbit-on-node: all
 	echo "rabbit:start()." | $(ERL_CALL)
@@ -178,9 +178,6 @@ start-rabbit-on-node: all
 stop-rabbit-on-node: all
 	echo "rabbit:stop()." | $(ERL_CALL)
 
-force-snapshot: all
-	echo "rabbit_persister:force_snapshot()." | $(ERL_CALL)
-
 set-memory-alarm: all
 	echo "alarm_handler:set_alarm({vm_memory_high_watermark, []})." | \
 	$(ERL_CALL)
diff --git a/codegen.py b/codegen.py
index 979c5bd8..1fd5bc69 100644
--- a/codegen.py
+++ b/codegen.py
@@ -1,32 +1,17 @@
-##   The contents of this file are subject to the Mozilla Public License
-##   Version 1.1 (the "License"); you may not use this file except in
-##   compliance with the License. You may obtain a copy of the License at
-##   http://www.mozilla.org/MPL/
+##  The contents of this file are subject to the Mozilla Public License
+##  Version 1.1 (the "License"); you may not use this file except in
+##  compliance with the License. You may obtain a copy of the License
+##  at http://www.mozilla.org/MPL/
 ##
-##   Software distributed under the License is distributed on an "AS IS"
-##   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-##   License for the specific language governing rights and limitations
-##   under the License.
+##  Software distributed under the License is distributed on an "AS IS"
+##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+##  the License for the specific language governing rights and
+##  limitations under the License.
 ##
-##   The Original Code is RabbitMQ.
+##  The Original Code is RabbitMQ.
 ##
-##   The Initial Developers of the Original Code are LShift Ltd,
-##   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-##   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-##   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-##   Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-##   Ltd. Portions created by Cohesive Financial Technologies LLC are
-##   Copyright (C) 2007-2010 Cohesive Financial Technologies
-##   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-##   (C) 2007-2010 Rabbit Technologies Ltd.
-##
-##   All Rights Reserved.
-##
-##   Contributor(s): ______________________________________.
+##  The Initial Developer of the Original Code is VMware, Inc.
+##  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 ##
 
 from __future__ import nested_scopes
@@ -119,35 +104,20 @@ def prettyType(typeName, subTypes, typesPerLine = 4):
 def printFileHeader():
     print """%%   Autogenerated code. Do not edit.
 %%
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
-%%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
-%%
-%%   The Original Code is RabbitMQ.
-%%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
+%%  The contents of this file are subject to the Mozilla Public License
+%%  Version 1.1 (the "License"); you may not use this file except in
+%%  compliance with the License. You may obtain a copy of the License
+%%  at http://www.mozilla.org/MPL/
 %%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
+%%  Software distributed under the License is distributed on an "AS IS"
+%%  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%%  the License for the specific language governing rights and
+%%  limitations under the License.
 %%
-%%   All Rights Reserved.
+%%  The Original Code is RabbitMQ.
 %%
-%%   Contributor(s): ______________________________________.
+%%  The Initial Developer of the Original Code is VMware, Inc.
+%%  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%"""
 
 def genErl(spec):
diff --git a/docs/html-to-website-xml.xsl b/docs/html-to-website-xml.xsl
index ec8f87e5..4bfcf6ca 100644
--- a/docs/html-to-website-xml.xsl
+++ b/docs/html-to-website-xml.xsl
@@ -1,6 +1,7 @@
 <?xml version='1.0'?>
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                 xmlns:doc="http://www.rabbitmq.com/namespaces/ad-hoc/doc"
+                xmlns="http://www.w3.org/1999/xhtml"
                 version='1.0'>
 
 <xsl:param name="original"/>
@@ -10,10 +11,16 @@
 <xsl:template match="*"/>
 
 <!-- Copy every element through -->
-<xsl:template match="@*|node()">
-  <xsl:copy><xsl:apply-templates select="@*|node()"/></xsl:copy>
+<xsl:template match="*">
+  <xsl:element name="{name()}" namespace="http://www.w3.org/1999/xhtml">
+    <xsl:apply-templates select="@*|node()"/>
+  </xsl:element>
 </xsl:template>
 
+<xsl:template match="@*">
+  <xsl:copy/>
+</xsl:template>
+  
 <!-- Copy the root node, and munge the outer part of the page -->
 <xsl:template match="/html">
 <xsl:processing-instruction name="xml-stylesheet">type="text/xml" href="page.xsl"</xsl:processing-instruction>
diff --git a/docs/rabbitmq-server.1.xml b/docs/rabbitmq-server.1.xml
index 03e76c79..687a9c39 100644
--- a/docs/rabbitmq-server.1.xml
+++ b/docs/rabbitmq-server.1.xml
@@ -21,7 +21,7 @@
 
     <refsynopsisdiv>
         <cmdsynopsis>
-          <command>rabbitmq-multi</command>
+          <command>rabbitmq-server</command>
           <arg choice="opt">-detached</arg>
         </cmdsynopsis>
     </refsynopsisdiv>
diff --git a/docs/rabbitmqctl.1.xml b/docs/rabbitmqctl.1.xml
index 6b02abe4..bd9fee7d 100644
--- a/docs/rabbitmqctl.1.xml
+++ b/docs/rabbitmqctl.1.xml
@@ -398,7 +398,12 @@
 
     <refsect2>
       <title>User management</title>
-
+      <para>
+        Note that <command>rabbitmqctl</command> manages the RabbitMQ
+        internal user database. Users from any alternative
+        authentication backend will not be visible
+        to <command>rabbitmqctl</command>.
+      </para>
       <variablelist>
         <varlistentry>
           <term><cmdsynopsis><command>add_user</command> <arg choice="req"><replaceable>username</replaceable></arg> <arg choice="req"><replaceable>password</replaceable></arg></cmdsynopsis></term>
@@ -466,6 +471,25 @@
         </varlistentry>
 
         <varlistentry>
+          <term><cmdsynopsis><command>clear_password</command> <arg choice="req"><replaceable>username</replaceable></arg></cmdsynopsis></term>
+          <listitem>
+            <variablelist>
+              <varlistentry>
+                <term>username</term>
+                <listitem><para>The name of the user whose password is to be cleared.</para></listitem>
+              </varlistentry>
+            </variablelist>
+            <para role="example-prefix">For example:</para>
+            <screen role="example">rabbitmqctl clear_password tonyg</screen>
+            <para role="example">
+              This command instructs the RabbitMQ broker to clear the
+              password for the user named
+              <command>tonyg</command>. This user now cannot log in with a password (but may be able to through e.g. SASL EXTERNAL if configured).
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
           <term><cmdsynopsis><command>set_admin</command> <arg choice="req"><replaceable>username</replaceable></arg></cmdsynopsis></term>
           <listitem>
             <variablelist>
@@ -525,7 +549,12 @@
 
     <refsect2>
       <title>Access control</title>
-
+      <para>
+        Note that <command>rabbitmqctl</command> manages the RabbitMQ
+        internal user database. Permissions for users from any
+        alternative authorisation backend will not be visible
+        to <command>rabbitmqctl</command>.
+      </para>
       <variablelist>
         <varlistentry>
           <term><cmdsynopsis><command>add_vhost</command> <arg choice="req"><replaceable>vhostpath</replaceable></arg></cmdsynopsis></term>
@@ -847,6 +876,10 @@
                 <listitem><para>Whether the exchange will be deleted automatically when no longer used.</para></listitem>
               </varlistentry>
               <varlistentry>
+                <term>internal</term>
+                <listitem><para>Whether the exchange is internal, i.e. cannot be directly published to by a client.</para></listitem>
+              </varlistentry>
+              <varlistentry>
                 <term>arguments</term>
                 <listitem><para>Exchange arguments.</para></listitem>
               </varlistentry>
@@ -977,6 +1010,26 @@
                 connection is secured with SSL.</para></listitem>
               </varlistentry>
               <varlistentry>
+                <term>ssl_protocol</term>
+                <listitem><para>SSL protocol
+                (e.g. tlsv1)</para></listitem>
+              </varlistentry>
+              <varlistentry>
+                <term>ssl_key_exchange</term>
+                <listitem><para>SSL key exchange algorithm
+                (e.g. rsa)</para></listitem>
+              </varlistentry>
+              <varlistentry>
+                <term>ssl_cipher</term>
+                <listitem><para>SSL cipher algorithm
+                (e.g. aes_256_cbc)</para></listitem>
+              </varlistentry>
+              <varlistentry>
+                <term>ssl_hash</term>
+                <listitem><para>SSL hash function
+                (e.g. sha)</para></listitem>
+              </varlistentry>
+              <varlistentry>
                 <term>peer_cert_subject</term>
                 <listitem><para>The subject of the peer's SSL
                 certificate, in RFC4514 form.</para></listitem>
@@ -1005,6 +1058,10 @@
                 <listitem><para>Version of the AMQP protocol in use (currently one of <command>{0,9,1}</command> or <command>{0,8,0}</command>). Note that if a client requests an AMQP 0-9 connection, we treat it as AMQP 0-9-1.</para></listitem>
               </varlistentry>
               <varlistentry>
+                <term>auth_mechanism</term>
+                <listitem><para>SASL authentication mechanism used, such as <command>PLAIN</command>.</para></listitem>
+              </varlistentry>
+              <varlistentry>
                 <term>user</term>
                 <listitem><para>Username associated with the connection.</para></listitem>
               </varlistentry>
@@ -1054,7 +1111,7 @@
             <para role="example-prefix">
               For example:
             </para>
-            <screen role="example">rabbitmqctl list_connections send_pend server_port</screen>
+            <screen role="example">rabbitmqctl list_connections send_pend port</screen>
             <para role="example">
               This command displays the send queue size and server port for each
               connection.
@@ -1134,6 +1191,16 @@
                     messages to the channel's consumers.
                     </para></listitem>
               </varlistentry>
+              <varlistentry>
+                <term>confirm</term>
+                <listitem><para>True if the channel is in confirm mode, false otherwise.</para></listitem>
+              </varlistentry>
+              <varlistentry>
+                <term>messages_unconfirmed</term>
+                <listitem><para>Number of published messages not yet
+                confirmed.  On channels not in confirm mode, this
+                remains 0.</para></listitem>
+              </varlistentry>
             </variablelist>
             <para>
               If no <command>channelinfoitem</command>s are specified then pid,
diff --git a/ebin/rabbit_app.in b/ebin/rabbit_app.in
index 17d05a99..5ed872b6 100644
--- a/ebin/rabbit_app.in
+++ b/ebin/rabbit_app.in
@@ -6,7 +6,6 @@
   {registered, [rabbit_amqqueue_sup,
                 rabbit_log,
                 rabbit_node_monitor,
-                rabbit_persister,
                 rabbit_router,
                 rabbit_sup,
                 rabbit_tcp_client_sup]},
@@ -31,4 +30,7 @@
          {default_permissions, [<<".*">>, <<".*">>, <<".*">>]},
          {cluster_nodes, []},
          {server_properties, []},
-         {collect_statistics, none}]}]}.
+         {collect_statistics, none},
+         {auth_mechanisms, ['PLAIN', 'AMQPLAIN']},
+         {auth_backends, [rabbit_auth_backend_internal]},
+         {delegate_count, 16}]}]}.
diff --git a/include/rabbit.hrl b/include/rabbit.hrl
index a1987fb2..15f5d7c5 100644
--- a/include/rabbit.hrl
+++ b/include/rabbit.hrl
@@ -1,35 +1,26 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
--record(user, {username, password_hash, is_admin}).
+-record(user, {username,
+               is_admin,
+               auth_backend, %% Module this user came from
+               impl          %% Scratch space for that module
+              }).
+
+-record(internal_user, {username, password_hash, is_admin}).
 -record(permission, {configure, write, read}).
 -record(user_vhost, {username, virtual_host}).
 -record(user_permission, {user_vhost, permission}).
@@ -51,7 +42,7 @@
 
 -record(resource, {virtual_host, kind, name}).
 
--record(exchange, {name, type, durable, auto_delete, arguments}).
+-record(exchange, {name, type, durable, auto_delete, internal, arguments}).
 
 -record(amqqueue, {name, durable, auto_delete, exclusive_owner = none,
                    arguments, pid}).
@@ -69,16 +60,17 @@
                         is_persistent}).
 
 -record(ssl_socket, {tcp, ssl}).
--record(delivery, {mandatory, immediate, txn, sender, message}).
+-record(delivery, {mandatory, immediate, txn, sender, message,
+                   msg_seq_no}).
 -record(amqp_error, {name, explanation = "", method = none}).
 
 -record(event, {type, props, timestamp}).
 
--record(message_properties, {expiry}).
+-record(message_properties, {expiry, needs_confirming = false}).
 
 %%----------------------------------------------------------------------------
 
--define(COPYRIGHT_MESSAGE, "Copyright (C) 2007-2010 LShift Ltd., Cohesive Financial Technologies LLC., and Rabbit Technologies Ltd.").
+-define(COPYRIGHT_MESSAGE, "Copyright (C) 2007-2011 VMware, Inc.").
 -define(INFORMATION_MESSAGE, "Licensed under the MPL.  See http://www.rabbitmq.com/").
 -define(PROTOCOL_VERSION, "AMQP 0-9-1 / 0-9 / 0-8").
 -define(ERTS_MINIMUM, "5.6.3").
diff --git a/include/rabbit_auth_backend_spec.hrl b/include/rabbit_auth_backend_spec.hrl
new file mode 100644
index 00000000..e26d44ea
--- /dev/null
+++ b/include/rabbit_auth_backend_spec.hrl
@@ -0,0 +1,32 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-ifdef(use_specs).
+
+-spec(description/0 :: () -> [{atom(), any()}]).
+
+-spec(check_user_login/2 :: (rabbit_types:username(), [term()]) ->
+                                 {'ok', rabbit_types:user()} |
+                                 {'refused', string(), [any()]} |
+                                 {'error', any()}).
+-spec(check_vhost_access/3 :: (rabbit_types:user(), rabbit_types:vhost(),
+                               rabbit_access_control:vhost_permission_atom()) ->
+                                   boolean() | {'error', any()}).
+-spec(check_resource_access/3 :: (rabbit_types:user(),
+                                  rabbit_types:r(atom()),
+                                  rabbit_access_control:permission_atom()) ->
+                                      boolean() | {'error', any()}).
+-endif.
diff --git a/include/rabbit_auth_mechanism_spec.hrl b/include/rabbit_auth_mechanism_spec.hrl
new file mode 100644
index 00000000..49614d5f
--- /dev/null
+++ b/include/rabbit_auth_mechanism_spec.hrl
@@ -0,0 +1,27 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-ifdef(use_specs).
+
+-spec(description/0 :: () -> [{atom(), any()}]).
+-spec(init/1 :: (rabbit_net:socket()) -> any()).
+-spec(handle_response/2 :: (binary(), any()) ->
+                                {'ok', rabbit_types:user()} |
+                                {'challenge', binary(), any()} |
+                                {'protocol_error', string(), [any()]} |
+                                {'refused', string(), [any()]}).
+
+-endif.
diff --git a/include/rabbit_backing_queue_spec.hrl b/include/rabbit_backing_queue_spec.hrl
index 20230b24..accb2c0e 100644
--- a/include/rabbit_backing_queue_spec.hrl
+++ b/include/rabbit_backing_queue_spec.hrl
@@ -1,42 +1,27 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
--type(fetch_result() ::
+-type(fetch_result(Ack) ::
         ('empty' |
          %% Message,                  IsDelivered, AckTag, Remaining_Len
-         {rabbit_types:basic_message(), boolean(), ack(), non_neg_integer()})).
+         {rabbit_types:basic_message(), boolean(), Ack, non_neg_integer()})).
 -type(is_durable() :: boolean()).
 -type(attempt_recovery() :: boolean()).
 -type(purged_msg_count() :: non_neg_integer()).
--type(ack_required() :: boolean()).
+-type(confirm_required() :: boolean()).
 -type(message_properties_transformer() ::
         fun ((rabbit_types:message_properties())
              -> rabbit_types:message_properties())).
@@ -50,13 +35,17 @@
 -spec(purge/1 :: (state()) -> {purged_msg_count(), state()}).
 -spec(publish/3 :: (rabbit_types:basic_message(),
                     rabbit_types:message_properties(), state()) -> state()).
--spec(publish_delivered/4 :: (ack_required(), rabbit_types:basic_message(),
+-spec(publish_delivered/4 :: (true, rabbit_types:basic_message(),
+                              rabbit_types:message_properties(), state())
+                             -> {ack(), state()};
+                             (false, rabbit_types:basic_message(),
                               rabbit_types:message_properties(), state())
-                             -> {ack(), state()}).
+                             -> {undefined, state()}).
 -spec(dropwhile/2 ::
         (fun ((rabbit_types:message_properties()) -> boolean()), state())
         -> state()).
--spec(fetch/2 :: (ack_required(), state()) -> {fetch_result(), state()}).
+-spec(fetch/2 :: (true,  state()) -> {fetch_result(ack()), state()};
+                 (false, state()) -> {fetch_result(undefined), state()}).
 -spec(ack/2 :: ([ack()], state()) -> state()).
 -spec(tx_publish/4 :: (rabbit_types:txn(), rabbit_types:basic_message(),
                        rabbit_types:message_properties(), state()) -> state()).
diff --git a/include/rabbit_exchange_type_spec.hrl b/include/rabbit_exchange_type_spec.hrl
index ae326a87..45c475d8 100644
--- a/include/rabbit_exchange_type_spec.hrl
+++ b/include/rabbit_exchange_type_spec.hrl
@@ -1,47 +1,33 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
+
 -ifdef(use_specs).
 
 -spec(description/0 :: () -> [{atom(), any()}]).
 -spec(route/2 :: (rabbit_types:exchange(), rabbit_types:delivery())
                  -> rabbit_router:match_result()).
 -spec(validate/1 :: (rabbit_types:exchange()) -> 'ok').
--spec(create/1 :: (rabbit_types:exchange()) -> 'ok').
+-spec(create/2 :: (boolean(), rabbit_types:exchange()) -> 'ok').
 -spec(recover/2 :: (rabbit_types:exchange(),
                     [rabbit_types:binding()]) -> 'ok').
--spec(delete/2 :: (rabbit_types:exchange(),
+-spec(delete/3 :: (boolean(), rabbit_types:exchange(),
                    [rabbit_types:binding()]) -> 'ok').
--spec(add_binding/2 :: (rabbit_types:exchange(),
+-spec(add_binding/3 :: (boolean(), rabbit_types:exchange(),
                         rabbit_types:binding()) -> 'ok').
--spec(remove_bindings/2 :: (rabbit_types:exchange(),
+-spec(remove_bindings/3 :: (boolean(), rabbit_types:exchange(),
                             [rabbit_types:binding()]) -> 'ok').
 -spec(assert_args_equivalence/2 ::
         (rabbit_types:exchange(), rabbit_framing:amqp_table())
diff --git a/include/rabbit_msg_store.hrl b/include/rabbit_msg_store.hrl
index d96fa758..9d704f65 100644
--- a/include/rabbit_msg_store.hrl
+++ b/include/rabbit_msg_store.hrl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -include("rabbit.hrl").
diff --git a/include/rabbit_msg_store_index.hrl b/include/rabbit_msg_store_index.hrl
index d4115363..289f8f60 100644
--- a/include/rabbit_msg_store_index.hrl
+++ b/include/rabbit_msg_store_index.hrl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -include("rabbit_msg_store.hrl").
diff --git a/packaging/RPMS/Fedora/rabbitmq-server.spec b/packaging/RPMS/Fedora/rabbitmq-server.spec
index 5032f471..b37f7ab1 100644
--- a/packaging/RPMS/Fedora/rabbitmq-server.spec
+++ b/packaging/RPMS/Fedora/rabbitmq-server.spec
@@ -124,6 +124,9 @@ done
 rm -rf %{buildroot}
 
 %changelog
+* Mon Nov 29 2010 rob@rabbitmq.com 2.2.0-1
+- New Upstream Release
+
 * Tue Oct 19 2010 vlad@rabbitmq.com 2.1.1-1
 - New Upstream Release
 
diff --git a/packaging/common/rabbitmq-script-wrapper b/packaging/common/rabbitmq-script-wrapper
index 79096a4e..23d2a06c 100644
--- a/packaging/common/rabbitmq-script-wrapper
+++ b/packaging/common/rabbitmq-script-wrapper
@@ -1,33 +1,18 @@
 #!/bin/sh
-##   The contents of this file are subject to the Mozilla Public License
-##   Version 1.1 (the "License"); you may not use this file except in
-##   compliance with the License. You may obtain a copy of the License at
-##   http://www.mozilla.org/MPL/
+##  The contents of this file are subject to the Mozilla Public License
+##  Version 1.1 (the "License"); you may not use this file except in
+##  compliance with the License. You may obtain a copy of the License
+##  at http://www.mozilla.org/MPL/
 ##
-##   Software distributed under the License is distributed on an "AS IS"
-##   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-##   License for the specific language governing rights and limitations
-##   under the License.
+##  Software distributed under the License is distributed on an "AS IS"
+##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+##  the License for the specific language governing rights and
+##  limitations under the License.
 ##
-##   The Original Code is RabbitMQ.
+##  The Original Code is RabbitMQ.
 ##
-##   The Initial Developers of the Original Code are LShift Ltd,
-##   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-##   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-##   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-##   Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-##   Ltd. Portions created by Cohesive Financial Technologies LLC are
-##   Copyright (C) 2007-2010 Cohesive Financial Technologies
-##   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-##   (C) 2007-2010 Rabbit Technologies Ltd.
-##
-##   All Rights Reserved.
-##
-##   Contributor(s): ______________________________________.
+##  The Initial Developer of the Original Code is VMware, Inc.
+##  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 ##
 
 # Escape spaces and quotes, because shell is revolting.
@@ -55,4 +40,3 @@ else
     echo
     exit 1
 fi
-
diff --git a/packaging/common/rabbitmq-server.ocf b/packaging/common/rabbitmq-server.ocf
index b969535a..dc0521dd 100755
--- a/packaging/common/rabbitmq-server.ocf
+++ b/packaging/common/rabbitmq-server.ocf
@@ -1,37 +1,22 @@
 #!/bin/sh
+##  The contents of this file are subject to the Mozilla Public License
+##  Version 1.1 (the "License"); you may not use this file except in
+##  compliance with the License. You may obtain a copy of the License
+##  at http://www.mozilla.org/MPL/
 ##
-##   OCF Resource Agent compliant rabbitmq-server resource script.
-##
-
-##   The contents of this file are subject to the Mozilla Public License
-##   Version 1.1 (the "License"); you may not use this file except in
-##   compliance with the License. You may obtain a copy of the License at
-##   http://www.mozilla.org/MPL/
-##
-##   Software distributed under the License is distributed on an "AS IS"
-##   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-##   License for the specific language governing rights and limitations
-##   under the License.
+##  Software distributed under the License is distributed on an "AS IS"
+##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+##  the License for the specific language governing rights and
+##  limitations under the License.
 ##
-##   The Original Code is RabbitMQ.
+##  The Original Code is RabbitMQ.
 ##
-##   The Initial Developers of the Original Code are LShift Ltd,
-##   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
+##  The Initial Developer of the Original Code is VMware, Inc.
+##  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 ##
-##   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-##   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-##   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-##   Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-##   Ltd. Portions created by Cohesive Financial Technologies LLC are
-##   Copyright (C) 2007-2010 Cohesive Financial Technologies
-##   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-##   (C) 2007-2010 Rabbit Technologies Ltd.
-##
-##   All Rights Reserved.
+
 ##
-##   Contributor(s): ______________________________________.
+##   OCF Resource Agent compliant rabbitmq-server resource script.
 ##
 
 ## OCF instance parameters
diff --git a/packaging/debs/Debian/debian/changelog b/packaging/debs/Debian/debian/changelog
index e81fda24..a60e691d 100644
--- a/packaging/debs/Debian/debian/changelog
+++ b/packaging/debs/Debian/debian/changelog
@@ -1,3 +1,9 @@
+rabbitmq-server (2.2.0-1) lucid; urgency=low
+
+  * New Upstream Release
+
+ -- Rob Harrop <rob@rabbitmq.com>  Mon, 29 Nov 2010 12:24:48 +0000
+
 rabbitmq-server (2.1.1-1) lucid; urgency=low
 
   * New Upstream Release
diff --git a/packaging/debs/Debian/debian/copyright b/packaging/debs/Debian/debian/copyright
index a569f31a..7206bb9b 100755
--- a/packaging/debs/Debian/debian/copyright
+++ b/packaging/debs/Debian/debian/copyright
@@ -3,23 +3,23 @@ Wed,  3 Jan 2007 15:43:44 +0000.
 
 It was downloaded from http://www.rabbitmq.com/
 
-The file codegen/amqp-0.8.json is covered by the following terms:
+The files codegen/amqp-rabbitmq-0.8.json and
+codegen/amqp-rabbitmq-0.9.1.json are covered by the following terms:
+
+        "Copyright (C) 2008-2011 VMware, Inc.
 
-        "Copyright (C) 2008-2010 LShift Ltd, Cohesive Financial Technologies LLC,
-        and Rabbit Technologies Ltd
-        
         Permission is hereby granted, free of charge, to any person
         obtaining a copy of this file (the Software), to deal in the
-        Software without restriction, including without limitation the 
-        rights to use, copy, modify, merge, publish, distribute, 
-        sublicense, and/or sell copies of the Software, and to permit 
-        persons to whom the Software is furnished to do so, subject to 
+        Software without restriction, including without limitation the
+        rights to use, copy, modify, merge, publish, distribute,
+        sublicense, and/or sell copies of the Software, and to permit
+        persons to whom the Software is furnished to do so, subject to
         the following conditions:
-	
-	The above copyright notice and this permission notice shall be
+
+        The above copyright notice and this permission notice shall be
         included in all copies or substantial portions of the Software.
-	
-	THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+
+        THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
         EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
         OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
         NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
@@ -31,19 +31,8 @@ The file codegen/amqp-0.8.json is covered by the following terms:
 The rest of this package is licensed under the Mozilla Public License 1.1
 Authors and Copyright are as described below:
 
-     The Initial Developers of the Original Code are LShift Ltd,
-     Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-
-     Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-     Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-     are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-     Technologies LLC, and Rabbit Technologies Ltd.
-
-     Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-     Ltd. Portions created by Cohesive Financial Technologies LLC are
-     Copyright (C) 2007-2010 Cohesive Financial Technologies
-     LLC. Portions created by Rabbit Technologies Ltd are Copyright
-     (C) 2007-2010 Rabbit Technologies Ltd.
+     The Initial Developer of the Original Code is VMware, Inc.
+     Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 
 
                           MOZILLA PUBLIC LICENSE
@@ -494,23 +483,8 @@ EXHIBIT A -Mozilla Public License.
 
      The Original Code is RabbitMQ.
 
-     The Initial Developers of the Original Code are LShift Ltd,
-     Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-
-     Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-     Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-     are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-     Technologies LLC, and Rabbit Technologies Ltd.
-
-     Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-     Ltd. Portions created by Cohesive Financial Technologies LLC are
-     Copyright (C) 2007-2010 Cohesive Financial Technologies
-     LLC. Portions created by Rabbit Technologies Ltd are Copyright
-     (C) 2007-2010 Rabbit Technologies Ltd.
-
-     All Rights Reserved.
-
-     Contributor(s): ______________________________________.''
+     The Initial Developer of the Original Code is VMware, Inc.
+     Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.''
 
      [NOTE: The text of this Exhibit A may differ slightly from the text of
      the notices in the Source Code files of the Original Code. You should
@@ -521,10 +495,8 @@ EXHIBIT A -Mozilla Public License.
 
 
 
-If you have any questions regarding licensing, please contact us at 
+If you have any questions regarding licensing, please contact us at
 info@rabbitmq.com.
 
-The Debian packaging is (C) 2007-2010, Rabbit Technologies Ltd. <info@rabbitmq.com>
-and is licensed under the MPL 1.1, see above.
-
-
+The Debian packaging is (C) 2007-2011, VMware, Inc. and is licensed
+under the MPL 1.1, see above.
diff --git a/packaging/macports/Portfile.in b/packaging/macports/Portfile.in
index ce6b1e34..f8417b83 100644
--- a/packaging/macports/Portfile.in
+++ b/packaging/macports/Portfile.in
@@ -7,6 +7,8 @@ version		@VERSION@
 categories	net 
 maintainers	paperplanes.de:meyer rabbitmq.com:tonyg openmaintainer
 platforms	darwin
+supported_archs	noarch
+
 description	The RabbitMQ AMQP Server
 long_description	\
     RabbitMQ is an implementation of AMQP, the emerging standard for \
@@ -31,17 +33,13 @@ checksums \
 depends_lib	port:erlang
 depends_build	port:libxslt
 
-platform darwin 7 {
-    depends_build-append port:py25-simplejson
-    build.args      PYTHON=${prefix}/bin/python2.5
-}
 platform darwin 8 {
-    depends_build-append port:py25-simplejson
-    build.args      PYTHON=${prefix}/bin/python2.5
+    depends_build-append port:py26-simplejson
+    build.args      PYTHON=${prefix}/bin/python2.6
 }
 platform darwin 9 {
-    depends_build-append port:py25-simplejson
-    build.args      PYTHON=${prefix}/bin/python2.5
+    depends_build-append port:py26-simplejson
+    build.args      PYTHON=${prefix}/bin/python2.6
 }
 # no need for simplejson on Snow Leopard or higher
 
diff --git a/scripts/rabbitmq-env b/scripts/rabbitmq-env
index 36734874..df4b24d8 100755
--- a/scripts/rabbitmq-env
+++ b/scripts/rabbitmq-env
@@ -1,33 +1,18 @@
 #!/bin/sh
-##   The contents of this file are subject to the Mozilla Public License
-##   Version 1.1 (the "License"); you may not use this file except in
-##   compliance with the License. You may obtain a copy of the License at
-##   http://www.mozilla.org/MPL/
+##  The contents of this file are subject to the Mozilla Public License
+##  Version 1.1 (the "License"); you may not use this file except in
+##  compliance with the License. You may obtain a copy of the License
+##  at http://www.mozilla.org/MPL/
 ##
-##   Software distributed under the License is distributed on an "AS IS"
-##   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-##   License for the specific language governing rights and limitations
-##   under the License.
+##  Software distributed under the License is distributed on an "AS IS"
+##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+##  the License for the specific language governing rights and
+##  limitations under the License.
 ##
-##   The Original Code is RabbitMQ.
+##  The Original Code is RabbitMQ.
 ##
-##   The Initial Developers of the Original Code are LShift Ltd,
-##   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-##   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-##   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-##   Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-##   Ltd. Portions created by Cohesive Financial Technologies LLC are
-##   Copyright (C) 2007-2010 Cohesive Financial Technologies
-##   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-##   (C) 2007-2010 Rabbit Technologies Ltd.
-##
-##   All Rights Reserved.
-##
-##   Contributor(s): ______________________________________.
+##  The Initial Developer of the Original Code is VMware, Inc.
+##  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 ##
 
 # Determine where this script is really located
@@ -48,6 +33,8 @@ done
 
 SCRIPT_DIR=`dirname $SCRIPT_PATH`
 RABBITMQ_HOME="${SCRIPT_DIR}/.."
+[ "x" = "x$HOSTNAME" ] && HOSTNAME=`env hostname`
+NODENAME=rabbit@${HOSTNAME%%.*}
 
 # Load configuration from the rabbitmq.conf file
 [ -f /etc/rabbitmq/rabbitmq.conf ] && . /etc/rabbitmq/rabbitmq.conf
diff --git a/scripts/rabbitmq-multi b/scripts/rabbitmq-multi
index 59050692..ebcf4b63 100755
--- a/scripts/rabbitmq-multi
+++ b/scripts/rabbitmq-multi
@@ -1,36 +1,20 @@
 #!/bin/sh
-##   The contents of this file are subject to the Mozilla Public License
-##   Version 1.1 (the "License"); you may not use this file except in
-##   compliance with the License. You may obtain a copy of the License at
-##   http://www.mozilla.org/MPL/
+##  The contents of this file are subject to the Mozilla Public License
+##  Version 1.1 (the "License"); you may not use this file except in
+##  compliance with the License. You may obtain a copy of the License
+##  at http://www.mozilla.org/MPL/
 ##
-##   Software distributed under the License is distributed on an "AS IS"
-##   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-##   License for the specific language governing rights and limitations
-##   under the License.
+##  Software distributed under the License is distributed on an "AS IS"
+##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+##  the License for the specific language governing rights and
+##  limitations under the License.
 ##
-##   The Original Code is RabbitMQ.
+##  The Original Code is RabbitMQ.
 ##
-##   The Initial Developers of the Original Code are LShift Ltd,
-##   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
+##  The Initial Developer of the Original Code is VMware, Inc.
+##  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 ##
-##   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-##   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-##   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-##   Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-##   Ltd. Portions created by Cohesive Financial Technologies LLC are
-##   Copyright (C) 2007-2010 Cohesive Financial Technologies
-##   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-##   (C) 2007-2010 Rabbit Technologies Ltd.
-##
-##   All Rights Reserved.
-##
-##   Contributor(s): ______________________________________.
-##
-[ "x" = "x$HOSTNAME" ] && HOSTNAME=`env hostname -s`
-NODENAME=rabbit@${HOSTNAME%%.*}
+
 SCRIPT_HOME=$(dirname $0)
 PIDS_FILE=/var/lib/rabbitmq/pids
 MULTI_ERL_ARGS=
diff --git a/scripts/rabbitmq-multi.bat b/scripts/rabbitmq-multi.bat
index a4f8c8b4..a2d10f2e 100644
--- a/scripts/rabbitmq-multi.bat
+++ b/scripts/rabbitmq-multi.bat
@@ -1,33 +1,18 @@
 @echo off
-REM   The contents of this file are subject to the Mozilla Public License
-REM   Version 1.1 (the "License"); you may not use this file except in
-REM   compliance with the License. You may obtain a copy of the License at
-REM   http://www.mozilla.org/MPL/
+REM  The contents of this file are subject to the Mozilla Public License
+REM  Version 1.1 (the "License"); you may not use this file except in
+REM  compliance with the License. You may obtain a copy of the License
+REM  at http://www.mozilla.org/MPL/
 REM
-REM   Software distributed under the License is distributed on an "AS IS"
-REM   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-REM   License for the specific language governing rights and limitations
-REM   under the License.
+REM  Software distributed under the License is distributed on an "AS IS"
+REM  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+REM  the License for the specific language governing rights and
+REM  limitations under the License.
 REM
-REM   The Original Code is RabbitMQ.
+REM  The Original Code is RabbitMQ.
 REM
-REM   The Initial Developers of the Original Code are LShift Ltd,
-REM   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-REM   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-REM   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-REM   Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-REM   Ltd. Portions created by Cohesive Financial Technologies LLC are
-REM   Copyright (C) 2007-2010 Cohesive Financial Technologies
-REM   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-REM   (C) 2007-2010 Rabbit Technologies Ltd.
-REM
-REM   All Rights Reserved.
-REM
-REM   Contributor(s): ______________________________________.
+REM  The Initial Developer of the Original Code is VMware, Inc.
+REM  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 REM
 
 setlocal
@@ -89,7 +74,7 @@ if not exist "!ERLANG_HOME!\bin\erl.exe" (
 -pa "!TDP0!..\ebin" ^
 -noinput -hidden ^
 !RABBITMQ_MULTI_ERL_ARGS! ^
--sname rabbitmq_multi ^
+-sname rabbitmq_multi!RANDOM! ^
 !RABBITMQ_CONFIG_ARG! ^
 -s rabbit_multi ^
 !RABBITMQ_MULTI_START_ARGS! ^
diff --git a/scripts/rabbitmq-server b/scripts/rabbitmq-server
index c5d883c3..447df510 100755
--- a/scripts/rabbitmq-server
+++ b/scripts/rabbitmq-server
@@ -1,37 +1,20 @@
 #!/bin/sh
-##   The contents of this file are subject to the Mozilla Public License
-##   Version 1.1 (the "License"); you may not use this file except in
-##   compliance with the License. You may obtain a copy of the License at
-##   http://www.mozilla.org/MPL/
+##  The contents of this file are subject to the Mozilla Public License
+##  Version 1.1 (the "License"); you may not use this file except in
+##  compliance with the License. You may obtain a copy of the License
+##  at http://www.mozilla.org/MPL/
 ##
-##   Software distributed under the License is distributed on an "AS IS"
-##   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-##   License for the specific language governing rights and limitations
-##   under the License.
+##  Software distributed under the License is distributed on an "AS IS"
+##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+##  the License for the specific language governing rights and
+##  limitations under the License.
 ##
-##   The Original Code is RabbitMQ.
+##  The Original Code is RabbitMQ.
 ##
-##   The Initial Developers of the Original Code are LShift Ltd,
-##   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-##   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-##   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-##   Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-##   Ltd. Portions created by Cohesive Financial Technologies LLC are
-##   Copyright (C) 2007-2010 Cohesive Financial Technologies
-##   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-##   (C) 2007-2010 Rabbit Technologies Ltd.
-##
-##   All Rights Reserved.
-##
-##   Contributor(s): ______________________________________.
+##  The Initial Developer of the Original Code is VMware, Inc.
+##  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 ##
 
-[ "x" = "x$HOSTNAME" ] && HOSTNAME=`env hostname -s`
-NODENAME=rabbit@${HOSTNAME%%.*}
 SERVER_ERL_ARGS="+K true +A30 +P 1048576 \
 -kernel inet_default_listen_options [{nodelay,true}] \
 -kernel inet_default_connect_options [{nodelay,true}]"
@@ -91,8 +74,9 @@ if [ "x" = "x$RABBITMQ_NODE_ONLY" ]; then
 	-pa "$RABBITMQ_EBIN_ROOT" \
 	-noinput \
 	-hidden \
-	-s rabbit_plugin_activator \
-	-extra "$RABBITMQ_PLUGINS_DIR" "${RABBITMQ_PLUGINS_EXPAND_DIR}"
+	-s rabbit_prelaunch \
+	-sname rabbitmqprelaunch$$ \
+	-extra "$RABBITMQ_PLUGINS_DIR" "${RABBITMQ_PLUGINS_EXPAND_DIR}" "${RABBITMQ_NODENAME}"
     then
 	RABBITMQ_BOOT_FILE="${RABBITMQ_PLUGINS_EXPAND_DIR}/rabbit"
 	RABBITMQ_EBIN_PATH=""
diff --git a/scripts/rabbitmq-server.bat b/scripts/rabbitmq-server.bat
index 94180de9..2467f2b5 100644
--- a/scripts/rabbitmq-server.bat
+++ b/scripts/rabbitmq-server.bat
@@ -1,33 +1,18 @@
 @echo off
-REM   The contents of this file are subject to the Mozilla Public License
-REM   Version 1.1 (the "License"); you may not use this file except in
-REM   compliance with the License. You may obtain a copy of the License at
-REM   http://www.mozilla.org/MPL/
+REM  The contents of this file are subject to the Mozilla Public License
+REM  Version 1.1 (the "License"); you may not use this file except in
+REM  compliance with the License. You may obtain a copy of the License
+REM  at http://www.mozilla.org/MPL/
 REM
-REM   Software distributed under the License is distributed on an "AS IS"
-REM   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-REM   License for the specific language governing rights and limitations
-REM   under the License.
+REM  Software distributed under the License is distributed on an "AS IS"
+REM  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+REM  the License for the specific language governing rights and
+REM  limitations under the License.
 REM
-REM   The Original Code is RabbitMQ.
+REM  The Original Code is RabbitMQ.
 REM
-REM   The Initial Developers of the Original Code are LShift Ltd,
-REM   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-REM   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-REM   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-REM   Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-REM   Ltd. Portions created by Cohesive Financial Technologies LLC are
-REM   Copyright (C) 2007-2010 Cohesive Financial Technologies
-REM   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-REM   (C) 2007-2010 Rabbit Technologies Ltd.
-REM
-REM   All Rights Reserved.
-REM
-REM   Contributor(s): ______________________________________.
+REM  The Initial Developer of the Original Code is VMware, Inc.
+REM  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 REM
 
 setlocal
@@ -117,13 +102,14 @@ set RABBITMQ_EBIN_ROOT=!TDP0!..\ebin
 "!ERLANG_HOME!\bin\erl.exe" ^
 -pa "!RABBITMQ_EBIN_ROOT!" ^
 -noinput -hidden ^
--s rabbit_plugin_activator ^
+-s rabbit_prelaunch ^
+-sname rabbitmqprelaunch!RANDOM! ^
 -extra "!RABBITMQ_PLUGINS_DIR:\=/!" ^
-       "!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!"
+       "!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!" ^
+       "!RABBITMQ_NODENAME!"
 
 set RABBITMQ_BOOT_FILE=!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit
-if not exist "!RABBITMQ_BOOT_FILE!.boot" (
-    echo Custom Boot File "!RABBITMQ_BOOT_FILE!.boot" is missing.
+if ERRORLEVEL 1 (
     exit /B 1
 )
 
diff --git a/scripts/rabbitmq-service.bat b/scripts/rabbitmq-service.bat
index 2c96b6fd..49b6b9ce 100644
--- a/scripts/rabbitmq-service.bat
+++ b/scripts/rabbitmq-service.bat
@@ -1,33 +1,18 @@
 @echo off
-REM   The contents of this file are subject to the Mozilla Public License
-REM   Version 1.1 (the "License"); you may not use this file except in
-REM   compliance with the License. You may obtain a copy of the License at
-REM   http://www.mozilla.org/MPL/
+REM  The contents of this file are subject to the Mozilla Public License
+REM  Version 1.1 (the "License"); you may not use this file except in
+REM  compliance with the License. You may obtain a copy of the License
+REM  at http://www.mozilla.org/MPL/
 REM
-REM   Software distributed under the License is distributed on an "AS IS"
-REM   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-REM   License for the specific language governing rights and limitations
-REM   under the License.
+REM  Software distributed under the License is distributed on an "AS IS"
+REM  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+REM  the License for the specific language governing rights and
+REM  limitations under the License.
 REM
-REM   The Original Code is RabbitMQ.
+REM  The Original Code is RabbitMQ.
 REM
-REM   The Initial Developers of the Original Code are LShift Ltd,
-REM   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-REM   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-REM   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-REM   Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-REM   Ltd. Portions created by Cohesive Financial Technologies LLC are
-REM   Copyright (C) 2007-2010 Cohesive Financial Technologies
-REM   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-REM   (C) 2007-2010 Rabbit Technologies Ltd.
-REM
-REM   All Rights Reserved.
-REM
-REM   Contributor(s): ______________________________________.
+REM  The Initial Developer of the Original Code is VMware, Inc.
+REM  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 REM
 
 setlocal
@@ -186,13 +171,13 @@ set RABBITMQ_EBIN_ROOT=!TDP0!..\ebin
 "!ERLANG_HOME!\bin\erl.exe" ^
 -pa "!RABBITMQ_EBIN_ROOT!" ^
 -noinput -hidden ^
--s rabbit_plugin_activator ^
+-s rabbit_prelaunch ^
 -extra "!RABBITMQ_PLUGINS_DIR:\=/!" ^
-       "!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!"
+       "!RABBITMQ_PLUGINS_EXPAND_DIR:\=/!" ^
+       ""
 
 set RABBITMQ_BOOT_FILE=!RABBITMQ_PLUGINS_EXPAND_DIR!\rabbit
-if not exist "!RABBITMQ_BOOT_FILE!.boot" (
-    echo Custom Boot File "!RABBITMQ_BOOT_FILE!.boot" is missing.
+if ERRORLEVEL 1 (
     exit /B 1
 )
 
diff --git a/scripts/rabbitmqctl b/scripts/rabbitmqctl
index 76ce25fd..9a11c3b3 100755
--- a/scripts/rabbitmqctl
+++ b/scripts/rabbitmqctl
@@ -1,37 +1,19 @@
 #!/bin/sh
-##   The contents of this file are subject to the Mozilla Public License
-##   Version 1.1 (the "License"); you may not use this file except in
-##   compliance with the License. You may obtain a copy of the License at
-##   http://www.mozilla.org/MPL/
+##  The contents of this file are subject to the Mozilla Public License
+##  Version 1.1 (the "License"); you may not use this file except in
+##  compliance with the License. You may obtain a copy of the License
+##  at http://www.mozilla.org/MPL/
 ##
-##   Software distributed under the License is distributed on an "AS IS"
-##   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-##   License for the specific language governing rights and limitations
-##   under the License.
+##  Software distributed under the License is distributed on an "AS IS"
+##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+##  the License for the specific language governing rights and
+##  limitations under the License.
 ##
-##   The Original Code is RabbitMQ.
+##  The Original Code is RabbitMQ.
 ##
-##   The Initial Developers of the Original Code are LShift Ltd,
-##   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
+##  The Initial Developer of the Original Code is VMware, Inc.
+##  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 ##
-##   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-##   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-##   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-##   Technologies LLC, and Rabbit Technologies Ltd.
-##
-##   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-##   Ltd. Portions created by Cohesive Financial Technologies LLC are
-##   Copyright (C) 2007-2010 Cohesive Financial Technologies
-##   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-##   (C) 2007-2010 Rabbit Technologies Ltd.
-##
-##   All Rights Reserved.
-##
-##   Contributor(s): ______________________________________.
-##
-
-[ "x" = "x$HOSTNAME" ] && HOSTNAME=`env hostname -s`
-NODENAME=rabbit@${HOSTNAME%%.*}
 
 . `dirname $0`/rabbitmq-env
 
diff --git a/scripts/rabbitmqctl.bat b/scripts/rabbitmqctl.bat
index 563b9e58..a74a91fd 100644
--- a/scripts/rabbitmqctl.bat
+++ b/scripts/rabbitmqctl.bat
@@ -1,33 +1,18 @@
 @echo off
-REM   The contents of this file are subject to the Mozilla Public License
-REM   Version 1.1 (the "License"); you may not use this file except in
-REM   compliance with the License. You may obtain a copy of the License at
-REM   http://www.mozilla.org/MPL/
+REM  The contents of this file are subject to the Mozilla Public License
+REM  Version 1.1 (the "License"); you may not use this file except in
+REM  compliance with the License. You may obtain a copy of the License
+REM  at http://www.mozilla.org/MPL/
 REM
-REM   Software distributed under the License is distributed on an "AS IS"
-REM   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-REM   License for the specific language governing rights and limitations
-REM   under the License.
+REM  Software distributed under the License is distributed on an "AS IS"
+REM  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+REM  the License for the specific language governing rights and
+REM  limitations under the License.
 REM
-REM   The Original Code is RabbitMQ.
+REM  The Original Code is RabbitMQ.
 REM
-REM   The Initial Developers of the Original Code are LShift Ltd,
-REM   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-REM   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-REM   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-REM   Technologies LLC, and Rabbit Technologies Ltd.
-REM
-REM   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-REM   Ltd. Portions created by Cohesive Financial Technologies LLC are
-REM   Copyright (C) 2007-2010 Cohesive Financial Technologies
-REM   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-REM   (C) 2007-2010 Rabbit Technologies Ltd.
-REM
-REM   All Rights Reserved.
-REM
-REM   Contributor(s): ______________________________________.
+REM  The Initial Developer of the Original Code is VMware, Inc.
+REM  Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 REM
 
 setlocal
@@ -58,7 +43,7 @@ if not exist "!ERLANG_HOME!\bin\erl.exe" (
     exit /B
 )
 
-"!ERLANG_HOME!\bin\erl.exe" -pa "!TDP0!..\ebin" -noinput -hidden !RABBITMQ_CTL_ERL_ARGS! -sname rabbitmqctl -s rabbit_control -nodename !RABBITMQ_NODENAME! -extra !STAR!
+"!ERLANG_HOME!\bin\erl.exe" -pa "!TDP0!..\ebin" -noinput -hidden !RABBITMQ_CTL_ERL_ARGS! -sname rabbitmqctl!RANDOM! -s rabbit_control -nodename !RABBITMQ_NODENAME! -extra !STAR!
 
 endlocal
 endlocal
diff --git a/src/bpqueue.erl b/src/bpqueue.erl
index 49874aa6..71a34262 100644
--- a/src/bpqueue.erl
+++ b/src/bpqueue.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(bpqueue).
diff --git a/src/delegate.erl b/src/delegate.erl
index 11abe73b..ff55a15b 100644
--- a/src/delegate.erl
+++ b/src/delegate.erl
@@ -1,41 +1,24 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(delegate).
 
--define(DELEGATE_PROCESS_COUNT_MULTIPLIER, 2).
-
 -behaviour(gen_server2).
 
--export([start_link/2, invoke_no_result/2, invoke/2, process_count/0]).
+-export([start_link/1, invoke_no_result/2, invoke/2, delegate_count/0]).
 
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
          terminate/2, code_change/3]).
@@ -44,13 +27,16 @@
 
 -ifdef(use_specs).
 
--spec(start_link/2 ::
-        (atom(), non_neg_integer()) -> {'ok', pid()} | {'error', any()}).
+-spec(start_link/1 ::
+        (non_neg_integer()) -> {'ok', pid()} | {'error', any()}).
 -spec(invoke_no_result/2 ::
         (pid() | [pid()], fun ((pid()) -> any())) -> 'ok').
--spec(invoke/2 :: (pid() | [pid()], fun ((pid()) -> A)) -> A).
+-spec(invoke/2 ::
+        ( pid(),  fun ((pid()) -> A)) -> A;
+        ([pid()], fun ((pid()) -> A)) -> {[{pid(), A}],
+                                          [{pid(), term()}]}).
 
--spec(process_count/0 :: () -> non_neg_integer()).
+-spec(delegate_count/0 :: () -> non_neg_integer()).
 
 -endif.
 
@@ -61,157 +47,113 @@
 
 %%----------------------------------------------------------------------------
 
-start_link(Prefix, Hash) ->
-    gen_server2:start_link({local, server(Prefix, Hash)}, ?MODULE, [], []).
+start_link(Num) ->
+    gen_server2:start_link({local, delegate_name(Num)}, ?MODULE, [], []).
 
+invoke(Pid, Fun) when is_pid(Pid) andalso node(Pid) =:= node() ->
+    Fun(Pid);
 invoke(Pid, Fun) when is_pid(Pid) ->
-    [Res] = invoke_per_node(split_delegate_per_node([Pid]), Fun),
-    case Res of
-        {ok, Result, _} ->
+    case invoke([Pid], Fun) of
+        {[{Pid, Result}], []} ->
             Result;
-        {error, {Class, Reason, StackTrace}, _} ->
+        {[], [{Pid, {Class, Reason, StackTrace}}]} ->
             erlang:raise(Class, Reason, StackTrace)
     end;
 
 invoke(Pids, Fun) when is_list(Pids) ->
-    lists:foldl(
-        fun ({Status, Result, Pid}, {Good, Bad}) ->
-            case Status of
-                ok    -> {[{Pid, Result}|Good], Bad};
-                error -> {Good, [{Pid, Result}|Bad]}
-            end
+    {LocalPids, Grouped} = group_pids_by_node(Pids),
+    %% The use of multi_call is only safe because the timeout is
+    %% infinity, and thus there is no process spawned in order to do
+    %% the sending. Thus calls can't overtake preceding calls/casts.
+    {Replies, BadNodes} =
+        case orddict:fetch_keys(Grouped) of
+            []          -> {[], []};
+            RemoteNodes -> gen_server2:multi_call(RemoteNodes, delegate(),
+                                                  {invoke, Fun, Grouped},
+                                                  infinity)
         end,
-        {[], []},
-        invoke_per_node(split_delegate_per_node(Pids), Fun)).
+    BadPids = [{Pid, {exit, {nodedown, BadNode}, []}} ||
+                  BadNode <- BadNodes,
+                  Pid     <- orddict:fetch(BadNode, Grouped)],
+    ResultsNoNode = lists:append([safe_invoke(LocalPids, Fun) |
+                                  [Results || {_Node, Results} <- Replies]]),
+    lists:foldl(
+      fun ({ok,    Pid, Result}, {Good, Bad}) -> {[{Pid, Result} | Good], Bad};
+          ({error, Pid, Error},  {Good, Bad}) -> {Good, [{Pid, Error} | Bad]}
+      end, {[], BadPids}, ResultsNoNode).
 
-invoke_no_result(Pid, Fun) when is_pid(Pid) ->
-    invoke_no_result_per_node(split_delegate_per_node([Pid]), Fun),
+invoke_no_result(Pid, Fun) when is_pid(Pid) andalso node(Pid) =:= node() ->
+    safe_invoke(Pid, Fun), %% we don't care about any error
     ok;
+invoke_no_result(Pid, Fun) when is_pid(Pid) ->
+    invoke_no_result([Pid], Fun);
 
 invoke_no_result(Pids, Fun) when is_list(Pids) ->
-    invoke_no_result_per_node(split_delegate_per_node(Pids),  Fun),
+    {LocalPids, Grouped} = group_pids_by_node(Pids),
+    case orddict:fetch_keys(Grouped) of
+        []          -> ok;
+        RemoteNodes -> gen_server2:abcast(RemoteNodes, delegate(),
+                                          {invoke, Fun, Grouped})
+    end,
+    safe_invoke(LocalPids, Fun), %% must not die
     ok.
 
 %%----------------------------------------------------------------------------
 
-internal_call(Node, Thunk) when is_atom(Node) ->
-    gen_server2:call({remote_server(Node), Node}, {thunk, Thunk}, infinity).
-
-internal_cast(Node, Thunk) when is_atom(Node) ->
-    gen_server2:cast({remote_server(Node), Node}, {thunk, Thunk}).
-
-split_delegate_per_node(Pids) ->
+group_pids_by_node(Pids) ->
     LocalNode = node(),
-    {Local, Remote} =
-        lists:foldl(
-          fun (Pid, {L, D}) ->
-                  Node = node(Pid),
-                  case Node of
-                      LocalNode -> {[Pid|L], D};
-                      _         -> {L, orddict:append(Node, Pid, D)}
-                  end
-          end,
-          {[], orddict:new()}, Pids),
-    {Local, orddict:to_list(Remote)}.
-
-invoke_per_node(NodePids, Fun) ->
-    lists:append(delegate_per_node(NodePids, Fun, fun internal_call/2)).
-
-invoke_no_result_per_node(NodePids, Fun) ->
-    delegate_per_node(NodePids, Fun, fun internal_cast/2),
-    ok.
-
-delegate_per_node({LocalPids, NodePids}, Fun, DelegateFun) ->
-    %% In the case where DelegateFun is internal_cast, the safe_invoke
-    %% is not actually async! However, in practice Fun will always be
-    %% something that does a gen_server:cast or similar, so I don't
-    %% think it's a problem unless someone misuses this
-    %% function. Making this *actually* async would be painful as we
-    %% can't spawn at this point or we break effect ordering.
-    [safe_invoke(LocalPids, Fun)|
-     delegate_per_remote_node(NodePids, Fun, DelegateFun)].
-
-delegate_per_remote_node(NodePids, Fun, DelegateFun) ->
-    Self = self(),
-    %% Note that this is unsafe if the Fun requires reentrancy to the
-    %% local_server. I.e. if self() == local_server(Node) then we'll
-    %% block forever.
-    [gen_server2:cast(
-       local_server(Node),
-       {thunk, fun () ->
-                       Self ! {result,
-                               DelegateFun(
-                                 Node, fun () -> safe_invoke(Pids, Fun) end)}
-               end}) || {Node, Pids} <- NodePids],
-    [receive {result, Result} -> Result end || _ <- NodePids].
-
-local_server(Node) ->
-    case get({delegate_local_server_name, Node}) of
-        undefined ->
-            Name = server(outgoing,
-                          erlang:phash2({self(), Node}, process_count())),
-            put({delegate_local_server_name, Node}, Name),
-            Name;
-        Name -> Name
-    end.
-
-remote_server(Node) ->
-    case get({delegate_remote_server_name, Node}) of
-        undefined ->
-            case rpc:call(Node, delegate, process_count, []) of
-                {badrpc, _} ->
-                    %% Have to return something, if we're just casting
-                    %% then we don't want to blow up
-                    server(incoming, 1);
-                Count ->
-                    Name = server(incoming,
-                                  erlang:phash2({self(), Node}, Count)),
-                    put({delegate_remote_server_name, Node}, Name),
-                    Name
-            end;
-        Name -> Name
+    lists:foldl(
+      fun (Pid, {Local, Remote}) when node(Pid) =:= LocalNode ->
+              {[Pid | Local], Remote};
+          (Pid, {Local, Remote}) ->
+              {Local,
+               orddict:update(
+                 node(Pid), fun (List) -> [Pid | List] end, [Pid], Remote)}
+      end, {[], orddict:new()}, Pids).
+
+delegate_count() ->
+    {ok, Count} = application:get_env(rabbit, delegate_count),
+    Count.
+
+delegate_name(Hash) ->
+    list_to_atom("delegate_" ++ integer_to_list(Hash)).
+
+delegate() ->
+    case get(delegate) of
+        undefined -> Name = delegate_name(
+                              erlang:phash2(self(), delegate_count())),
+                     put(delegate, Name),
+                     Name;
+        Name      -> Name
     end.
 
-server(Prefix, Hash) ->
-    list_to_atom("delegate_" ++
-                     atom_to_list(Prefix) ++ "_" ++
-                     integer_to_list(Hash)).
-
 safe_invoke(Pids, Fun) when is_list(Pids) ->
     [safe_invoke(Pid, Fun) || Pid <- Pids];
 safe_invoke(Pid, Fun) when is_pid(Pid) ->
     try
-        {ok, Fun(Pid), Pid}
-    catch
-        Class:Reason ->
-            {error, {Class, Reason, erlang:get_stacktrace()}, Pid}
+        {ok, Pid, Fun(Pid)}
+    catch Class:Reason ->
+            {error, Pid, {Class, Reason, erlang:get_stacktrace()}}
     end.
 
-process_count() ->
-    ?DELEGATE_PROCESS_COUNT_MULTIPLIER * erlang:system_info(schedulers).
-
-%%--------------------------------------------------------------------
+%%----------------------------------------------------------------------------
 
 init([]) ->
-    {ok, no_state, hibernate,
+    {ok, node(), hibernate,
      {backoff, ?HIBERNATE_AFTER_MIN, ?HIBERNATE_AFTER_MIN, ?DESIRED_HIBERNATE}}.
 
-%% We don't need a catch here; we always go via safe_invoke. A catch here would
-%% be the wrong thing anyway since the Thunk can throw multiple errors.
-handle_call({thunk, Thunk}, _From, State) ->
-    {reply, Thunk(), State, hibernate}.
+handle_call({invoke, Fun, Grouped}, _From, Node) ->
+    {reply, safe_invoke(orddict:fetch(Node, Grouped), Fun), Node, hibernate}.
 
-handle_cast({thunk, Thunk}, State) ->
-    Thunk(),
-    {noreply, State, hibernate}.
+handle_cast({invoke, Fun, Grouped}, Node) ->
+    safe_invoke(orddict:fetch(Node, Grouped), Fun),
+    {noreply, Node, hibernate}.
 
-handle_info(_Info, State) ->
-    {noreply, State, hibernate}.
+handle_info(_Info, Node) ->
+    {noreply, Node, hibernate}.
 
 terminate(_Reason, _State) ->
     ok.
 
-code_change(_OldVsn, State, _Extra) ->
-    {ok, State}.
-
-%%--------------------------------------------------------------------
+code_change(_OldVsn, Node, _Extra) ->
+    {ok, Node}.
diff --git a/src/delegate_sup.erl b/src/delegate_sup.erl
index 544546f1..52747221 100644
--- a/src/delegate_sup.erl
+++ b/src/delegate_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(delegate_sup).
@@ -55,11 +40,8 @@ start_link() ->
 %%----------------------------------------------------------------------------
 
 init(_Args) ->
-    {ok, {{one_for_one, 10, 10}, specs(incoming) ++ specs(outgoing)}}.
-
-specs(Prefix) ->
-    [{{Prefix, Hash}, {delegate, start_link, [Prefix, Hash]},
-      transient, 16#ffffffff, worker, [delegate]} ||
-        Hash <- lists:seq(0, delegate:process_count() - 1)].
-
-%%----------------------------------------------------------------------------
+    DCount = delegate:delegate_count(),
+    {ok, {{one_for_one, 10, 10},
+          [{Num, {delegate, start_link, [Num]},
+            transient, 16#ffffffff, worker, [delegate]} ||
+              Num <- lists:seq(0, DCount - 1)]}}.
diff --git a/src/file_handle_cache.erl b/src/file_handle_cache.erl
index 6a948d49..1e1f37cb 100644
--- a/src/file_handle_cache.erl
+++ b/src/file_handle_cache.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(file_handle_cache).
diff --git a/src/gatherer.erl b/src/gatherer.erl
index 1e03d6c4..aa43e9a9 100644
--- a/src/gatherer.erl
+++ b/src/gatherer.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(gatherer).
diff --git a/src/gen_server2.erl b/src/gen_server2.erl
index 6e02b23e..a637dddd 100644
--- a/src/gen_server2.erl
+++ b/src/gen_server2.erl
@@ -59,7 +59,7 @@
 %% being used. Instead it'll wait for the current timeout as described
 %% above.
 
-%% All modifications are (C) 2009-2010 LShift Ltd.
+%% All modifications are (C) 2009-2011 VMware, Inc.
 
 %% ``The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
diff --git a/src/pg_local.erl b/src/pg_local.erl
index 49fa873a..fd515747 100644
--- a/src/pg_local.erl
+++ b/src/pg_local.erl
@@ -13,7 +13,7 @@
 %%    versions of Erlang/OTP. The remaining type specs have been
 %%    removed.
 
-%% All modifications are (C) 2010 LShift Ltd.
+%% All modifications are (C) 2010-2011 VMware, Inc.
 
 %% %CopyrightBegin%
 %% 
diff --git a/src/priority_queue.erl b/src/priority_queue.erl
index 1e481ca7..4a94b24b 100644
--- a/src/priority_queue.erl
+++ b/src/priority_queue.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 %% Priority queues have essentially the same interface as ordinary
diff --git a/src/rabbit.erl b/src/rabbit.erl
index 61a3a53d..b041a637 100644
--- a/src/rabbit.erl
+++ b/src/rabbit.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit).
@@ -69,10 +54,10 @@
 -rabbit_boot_step({external_infrastructure,
                    [{description, "external infrastructure ready"}]}).
 
--rabbit_boot_step({rabbit_exchange_type_registry,
-                   [{description, "exchange type registry"},
+-rabbit_boot_step({rabbit_registry,
+                   [{description, "plugin registry"},
                     {mfa,         {rabbit_sup, start_child,
-                                   [rabbit_exchange_type_registry]}},
+                                   [rabbit_registry]}},
                     {requires,    external_infrastructure},
                     {enables,     kernel_ready}]}).
 
@@ -170,12 +155,6 @@
 
 %%---------------------------------------------------------------------------
 
--import(application).
--import(mnesia).
--import(lists).
--import(inet).
--import(gen_tcp).
-
 -include("rabbit_framing.hrl").
 -include("rabbit.hrl").
 
@@ -294,7 +273,8 @@ run_boot_step({StepName, Attributes}) ->
             [try
                  apply(M,F,A)
              catch
-                 _:Reason -> boot_error("FAILED~nReason: ~p~n", [Reason])
+                 _:Reason -> boot_error("FAILED~nReason: ~p~nStacktrace: ~p~n",
+                                        [Reason, erlang:get_stacktrace()])
              end || {M,F,A} <- MFAs],
             io:format("done~n"),
             ok
@@ -378,6 +358,14 @@ home_dir() ->
         Other          -> Other
     end.
 
+config_files() ->
+    case init:get_argument(config) of
+        {ok, Files} -> [filename:absname(
+                          filename:rootname(File, ".config") ++ ".config") ||
+                           File <- Files];
+        error       -> []
+    end.
+
 %---------------------------------------------------------------------------
 
 print_banner() ->
@@ -403,14 +391,24 @@ print_banner() ->
     Settings = [{"node",           node()},
                 {"app descriptor", app_location()},
                 {"home dir",       home_dir()},
+                {"config file(s)", config_files()},
                 {"cookie hash",    rabbit_misc:cookie_hash()},
                 {"log",            log_location(kernel)},
                 {"sasl log",       log_location(sasl)},
                 {"database dir",   rabbit_mnesia:dir()},
                 {"erlang version", erlang:system_info(version)}],
     DescrLen = 1 + lists:max([length(K) || {K, _V} <- Settings]),
-    Format = "~-" ++ integer_to_list(DescrLen) ++ "s: ~s~n",
-    lists:foreach(fun ({K, V}) -> io:format(Format, [K, V]) end, Settings),
+    Format = fun (K, V) ->
+                     io:format("~-" ++ integer_to_list(DescrLen) ++ "s: ~s~n",
+                               [K, V])
+             end,
+    lists:foreach(fun ({"config file(s)" = K, []}) ->
+                          Format(K, "(none)");
+                      ({"config file(s)" = K, [V0 | Vs]}) ->
+                          Format(K, V0), [Format("", V) || V <- Vs];
+                      ({K, V}) ->
+                          Format(K, V)
+                  end, Settings),
     io:nl().
 
 ensure_working_log_handlers() ->
@@ -463,16 +461,16 @@ insert_default_data() ->
     {ok, DefaultVHost} = application:get_env(default_vhost),
     {ok, [DefaultConfigurePerm, DefaultWritePerm, DefaultReadPerm]} =
         application:get_env(default_permissions),
-    ok = rabbit_access_control:add_vhost(DefaultVHost),
-    ok = rabbit_access_control:add_user(DefaultUser, DefaultPass),
+    ok = rabbit_vhost:add(DefaultVHost),
+    ok = rabbit_auth_backend_internal:add_user(DefaultUser, DefaultPass),
     case DefaultAdmin of
-        true -> rabbit_access_control:set_admin(DefaultUser);
+        true -> rabbit_auth_backend_internal:set_admin(DefaultUser);
         _    -> ok
     end,
-    ok = rabbit_access_control:set_permissions(DefaultUser, DefaultVHost,
-                                               DefaultConfigurePerm,
-                                               DefaultWritePerm,
-                                               DefaultReadPerm),
+    ok = rabbit_auth_backend_internal:set_permissions(DefaultUser, DefaultVHost,
+                                                      DefaultConfigurePerm,
+                                                      DefaultWritePerm,
+                                                      DefaultReadPerm),
     ok.
 
 rotate_logs(File, Suffix, Handler) ->
diff --git a/src/rabbit_access_control.erl b/src/rabbit_access_control.erl
index bc588013..b0b57af4 100644
--- a/src/rabbit_access_control.erl
+++ b/src/rabbit_access_control.erl
@@ -1,448 +1,137 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_access_control).
--include_lib("stdlib/include/qlc.hrl").
+
 -include("rabbit.hrl").
 
--export([check_login/2, user_pass_login/2, check_user_pass_login/2,
-         check_vhost_access/2, check_resource_access/3]).
--export([add_user/2, delete_user/1, change_password/2, set_admin/1,
-         clear_admin/1, list_users/0, lookup_user/1]).
--export([change_password_hash/2, hash_password/1]).
--export([add_vhost/1, delete_vhost/1, vhost_exists/1, list_vhosts/0]).
--export([set_permissions/5, clear_permissions/2,
-         list_permissions/0, list_vhost_permissions/1, list_user_permissions/1,
-         list_user_vhost_permissions/2]).
+-export([user_pass_login/2, check_user_pass_login/2, check_user_login/2,
+         check_vhost_access/2, check_resource_access/3, list_vhosts/2]).
 
 %%----------------------------------------------------------------------------
 
 -ifdef(use_specs).
 
--export_type([username/0, password/0, password_hash/0]).
+-export_type([permission_atom/0, vhost_permission_atom/0]).
 
 -type(permission_atom() :: 'configure' | 'read' | 'write').
--type(username() :: binary()).
--type(password() :: binary()).
--type(password_hash() :: binary()).
--type(regexp() :: binary()).
--spec(check_login/2 ::
-        (binary(), binary()) -> rabbit_types:user() |
-                                rabbit_types:channel_exit()).
+-type(vhost_permission_atom() :: 'read' | 'write').
+
 -spec(user_pass_login/2 ::
-        (username(), password())
+        (rabbit_types:username(), rabbit_types:password())
         -> rabbit_types:user() | rabbit_types:channel_exit()).
 -spec(check_user_pass_login/2 ::
-        (username(), password())
-        -> {'ok', rabbit_types:user()} | 'refused').
+        (rabbit_types:username(), rabbit_types:password())
+        -> {'ok', rabbit_types:user()} | {'refused', string(), [any()]}).
 -spec(check_vhost_access/2 ::
         (rabbit_types:user(), rabbit_types:vhost())
         -> 'ok' | rabbit_types:channel_exit()).
 -spec(check_resource_access/3 ::
-        (username(), rabbit_types:r(atom()), permission_atom())
+        (rabbit_types:user(), rabbit_types:r(atom()), permission_atom())
         -> 'ok' | rabbit_types:channel_exit()).
--spec(add_user/2 :: (username(), password()) -> 'ok').
--spec(delete_user/1 :: (username()) -> 'ok').
--spec(change_password/2 :: (username(), password()) -> 'ok').
--spec(change_password_hash/2 :: (username(), password_hash()) -> 'ok').
--spec(hash_password/1 :: (password()) -> password_hash()).
--spec(set_admin/1 :: (username()) -> 'ok').
--spec(clear_admin/1 :: (username()) -> 'ok').
--spec(list_users/0 :: () -> [{username(), boolean()}]).
--spec(lookup_user/1 ::
-        (username()) -> rabbit_types:ok(rabbit_types:user())
-                            | rabbit_types:error('not_found')).
--spec(add_vhost/1 :: (rabbit_types:vhost()) -> 'ok').
--spec(delete_vhost/1 :: (rabbit_types:vhost()) -> 'ok').
--spec(vhost_exists/1 :: (rabbit_types:vhost()) -> boolean()).
--spec(list_vhosts/0 :: () -> [rabbit_types:vhost()]).
--spec(set_permissions/5 ::(username(), rabbit_types:vhost(), regexp(),
-                           regexp(), regexp()) -> 'ok').
--spec(clear_permissions/2 :: (username(), rabbit_types:vhost()) -> 'ok').
--spec(list_permissions/0 ::
-        () -> [{username(), rabbit_types:vhost(), regexp(), regexp(), regexp()}]).
--spec(list_vhost_permissions/1 ::
-        (rabbit_types:vhost()) -> [{username(), regexp(), regexp(), regexp()}]).
--spec(list_user_permissions/1 ::
-        (username()) -> [{rabbit_types:vhost(), regexp(), regexp(), regexp()}]).
--spec(list_user_vhost_permissions/2 ::
-        (username(), rabbit_types:vhost()) -> [{regexp(), regexp(), regexp()}]).
+-spec(list_vhosts/2 :: (rabbit_types:user(), vhost_permission_atom())
+                       -> [rabbit_types:vhost()]).
 
 -endif.
 
 %%----------------------------------------------------------------------------
 
-%% SASL PLAIN, as used by the Qpid Java client and our clients. Also,
-%% apparently, by OpenAMQ.
-check_login(<<"PLAIN">>, Response) ->
-    [User, Pass] = [list_to_binary(T) ||
-                       T <- string:tokens(binary_to_list(Response), [0])],
-    user_pass_login(User, Pass);
-%% AMQPLAIN, as used by Qpid Python test suite. The 0-8 spec actually
-%% defines this as PLAIN, but in 0-9 that definition is gone, instead
-%% referring generically to "SASL security mechanism", i.e. the above.
-check_login(<<"AMQPLAIN">>, Response) ->
-    LoginTable = rabbit_binary_parser:parse_table(Response),
-    case {lists:keysearch(<<"LOGIN">>, 1, LoginTable),
-          lists:keysearch(<<"PASSWORD">>, 1, LoginTable)} of
-        {{value, {_, longstr, User}},
-         {value, {_, longstr, Pass}}} ->
-            user_pass_login(User, Pass);
-        _ ->
-            %% Is this an information leak?
-            rabbit_misc:protocol_error(
-              access_refused,
-              "AMQPPLAIN auth info ~w is missing LOGIN or PASSWORD field",
-              [LoginTable])
-    end;
-
-check_login(Mechanism, _Response) ->
-    rabbit_misc:protocol_error(
-      access_refused, "unsupported authentication mechanism '~s'",
-      [Mechanism]).
-
 user_pass_login(User, Pass) ->
     ?LOGDEBUG("Login with user ~p pass ~p~n", [User, Pass]),
     case check_user_pass_login(User, Pass) of
-        refused ->
+        {refused, Msg, Args} ->
             rabbit_misc:protocol_error(
-              access_refused, "login refused for user '~s'", [User]);
+              access_refused, "login refused: ~s", [io_lib:format(Msg, Args)]);
         {ok, U} ->
             U
     end.
 
-check_user_pass_login(User, Pass) ->
-    case lookup_user(User) of
-        {ok, U} ->
-            case check_password(Pass, U#user.password_hash) of
-                true -> {ok, U};
-                _    -> refused
-            end;
-        {error, not_found} ->
-            refused
-    end.
-
-internal_lookup_vhost_access(Username, VHostPath) ->
-    %% TODO: use dirty ops instead
-    rabbit_misc:execute_mnesia_transaction(
-      fun () ->
-              case mnesia:read({rabbit_user_permission,
-                                #user_vhost{username     = Username,
-                                            virtual_host = VHostPath}}) of
-                  [] -> not_found;
-                  [R] -> {ok, R}
-              end
-      end).
-
-check_vhost_access(#user{username = Username}, VHostPath) ->
+check_user_pass_login(Username, Password) ->
+    check_user_login(Username, [{password, Password}]).
+
+check_user_login(Username, AuthProps) ->
+    {ok, Modules} = application:get_env(rabbit, auth_backends),
+    lists:foldl(
+      fun(Module, {refused, _, _}) ->
+              case Module:check_user_login(Username, AuthProps) of
+                  {error, E} ->
+                      {refused, "~s failed authenticating ~s: ~p~n",
+                       [Module, Username, E]};
+                  Else ->
+                      Else
+              end;
+         (_, {ok, User}) ->
+              {ok, User}
+      end, {refused, "No modules checked '~s'", [Username]}, Modules).
+
+check_vhost_access(User = #user{ username     = Username,
+                                 auth_backend = Module }, VHostPath) ->
     ?LOGDEBUG("Checking VHost access for ~p to ~p~n", [Username, VHostPath]),
-    case internal_lookup_vhost_access(Username, VHostPath) of
-        {ok, _R} ->
-            ok;
-        not_found ->
-            rabbit_misc:protocol_error(
-              access_refused, "access to vhost '~s' refused for user '~s'",
-              [VHostPath, Username])
-    end.
-
-permission_index(configure) -> #permission.configure;
-permission_index(write)     -> #permission.write;
-permission_index(read)      -> #permission.read.
-
-check_resource_access(Username,
-                      R = #resource{kind = exchange, name = <<"">>},
+    check_access(
+      fun() ->
+              rabbit_vhost:exists(VHostPath) andalso
+                  Module:check_vhost_access(User, VHostPath, write)
+      end,
+      "~s failed checking vhost access to ~s for ~s: ~p~n",
+      [Module, VHostPath, Username],
+      "access to vhost '~s' refused for user '~s'",
+      [VHostPath, Username]).
+
+check_resource_access(User, R = #resource{kind = exchange, name = <<"">>},
                       Permission) ->
-    check_resource_access(Username,
-                          R#resource{name = <<"amq.default">>},
+    check_resource_access(User, R#resource{name = <<"amq.default">>},
                           Permission);
-check_resource_access(Username,
-                      R = #resource{virtual_host = VHostPath, name = Name},
-                      Permission) ->
-    Res = case mnesia:dirty_read({rabbit_user_permission,
-                                  #user_vhost{username     = Username,
-                                              virtual_host = VHostPath}}) of
-              [] ->
-                  false;
-              [#user_permission{permission = P}] ->
-                  PermRegexp =
-                      case element(permission_index(Permission), P) of
-                          %% <<"^$">> breaks Emacs' erlang mode
-                          <<"">> -> <<$^, $$>>;
-                          RE     -> RE
-                      end,
-                  case re:run(Name, PermRegexp, [{capture, none}]) of
-                      match    -> true;
-                      nomatch  -> false
-                  end
-          end,
-    if Res  -> ok;
-       true -> rabbit_misc:protocol_error(
-                 access_refused, "access to ~s refused for user '~s'",
-                 [rabbit_misc:rs(R), Username])
-    end.
-
-add_user(Username, Password) ->
-    R = rabbit_misc:execute_mnesia_transaction(
-          fun () ->
-                  case mnesia:wread({rabbit_user, Username}) of
-                      [] ->
-                          ok = mnesia:write(rabbit_user,
-                                            #user{username = Username,
-                                                  password_hash =
-                                                      hash_password(Password),
-                                                  is_admin = false},
-                                            write);
-                      _ ->
-                          mnesia:abort({user_already_exists, Username})
-                  end
-          end),
-    rabbit_log:info("Created user ~p~n", [Username]),
-    R.
-
-delete_user(Username) ->
-    R = rabbit_misc:execute_mnesia_transaction(
-          rabbit_misc:with_user(
-            Username,
-            fun () ->
-                    ok = mnesia:delete({rabbit_user, Username}),
-                    [ok = mnesia:delete_object(
-                            rabbit_user_permission, R, write) ||
-                        R <- mnesia:match_object(
-                               rabbit_user_permission,
-                               #user_permission{user_vhost = #user_vhost{
-                                                  username = Username,
-                                                  virtual_host = '_'},
-                                                permission = '_'},
-                               write)],
-                    ok
-            end)),
-    rabbit_log:info("Deleted user ~p~n", [Username]),
-    R.
-
-change_password(Username, Password) ->
-    change_password_hash(Username, hash_password(Password)).
-
-change_password_hash(Username, PasswordHash) ->
-    R = update_user(Username, fun(User) ->
-                                      User#user{ password_hash = PasswordHash }
-                              end),
-    rabbit_log:info("Changed password for user ~p~n", [Username]),
-    R.
-
-hash_password(Cleartext) ->
-    Salt = make_salt(),
-    Hash = salted_md5(Salt, Cleartext),
-    <<Salt/binary, Hash/binary>>.
-
-check_password(Cleartext, <<Salt:4/binary, Hash/binary>>) ->
-    Hash =:= salted_md5(Salt, Cleartext).
-
-make_salt() ->
-    {A1,A2,A3} = now(),
-    random:seed(A1, A2, A3),
-    Salt = random:uniform(16#ffffffff),
-    <<Salt:32>>.
-
-salted_md5(Salt, Cleartext) ->
-    Salted = <<Salt/binary, Cleartext/binary>>,
-    erlang:md5(Salted).
-
-set_admin(Username) ->
-    set_admin(Username, true).
-
-clear_admin(Username) ->
-    set_admin(Username, false).
-
-set_admin(Username, IsAdmin) ->
-    R = update_user(Username, fun(User) ->
-                                      User#user{is_admin = IsAdmin}
-                              end),
-    rabbit_log:info("Set user admin flag for user ~p to ~p~n",
-                    [Username, IsAdmin]),
-    R.
-
-update_user(Username, Fun) ->
-    rabbit_misc:execute_mnesia_transaction(
-      rabbit_misc:with_user(
-        Username,
-        fun () ->
-                {ok, User} = lookup_user(Username),
-                ok = mnesia:write(rabbit_user, Fun(User), write)
-        end)).
-
-list_users() ->
-    [{Username, IsAdmin} ||
-        #user{username = Username, is_admin = IsAdmin} <-
-            mnesia:dirty_match_object(rabbit_user, #user{_ = '_'})].
-
-lookup_user(Username) ->
-    rabbit_misc:dirty_read({rabbit_user, Username}).
-
-add_vhost(VHostPath) ->
-    R = rabbit_misc:execute_mnesia_transaction(
-          fun () ->
-                  case mnesia:wread({rabbit_vhost, VHostPath}) of
-                      [] ->
-                          ok = mnesia:write(rabbit_vhost,
-                                            #vhost{virtual_host = VHostPath},
-                                            write),
-                          [rabbit_exchange:declare(
-                             rabbit_misc:r(VHostPath, exchange, Name),
-                             Type, true, false, []) ||
-                              {Name,Type} <-
-                                  [{<<"">>,           direct},
-                                   {<<"amq.direct">>, direct},
-                                   {<<"amq.topic">>,  topic},
-                                   {<<"amq.match">>,  headers}, %% per 0-9-1 pdf
-                                   {<<"amq.headers">>,  headers}, %% per 0-9-1 xml
-                                   {<<"amq.fanout">>, fanout}]],
-                          ok;
-                      [_] ->
-                          mnesia:abort({vhost_already_exists, VHostPath})
-                  end
-          end),
-    rabbit_log:info("Added vhost ~p~n", [VHostPath]),
-    R.
-
-delete_vhost(VHostPath) ->
-    %%FIXME: We are forced to delete the queues outside the TX below
-    %%because queue deletion involves sending messages to the queue
-    %%process, which in turn results in further mnesia actions and
-    %%eventually the termination of that process.
-    lists:foreach(fun (Q) ->
-                          {ok,_} = rabbit_amqqueue:delete(Q, false, false)
-                  end,
-                  rabbit_amqqueue:list(VHostPath)),
-    R = rabbit_misc:execute_mnesia_transaction(
-          rabbit_misc:with_vhost(
-            VHostPath,
-            fun () ->
-                    ok = internal_delete_vhost(VHostPath)
-            end)),
-    rabbit_log:info("Deleted vhost ~p~n", [VHostPath]),
-    R.
-
-internal_delete_vhost(VHostPath) ->
-    lists:foreach(fun (#exchange{name = Name}) ->
-                          ok = rabbit_exchange:delete(Name, false)
-                  end,
-                  rabbit_exchange:list(VHostPath)),
-    lists:foreach(fun ({Username, _, _, _}) ->
-                          ok = clear_permissions(Username, VHostPath)
-                  end,
-                  list_vhost_permissions(VHostPath)),
-    ok = mnesia:delete({rabbit_vhost, VHostPath}),
-    ok.
-
-vhost_exists(VHostPath) ->
-    mnesia:dirty_read({rabbit_vhost, VHostPath}) /= [].
-
-list_vhosts() ->
-    mnesia:dirty_all_keys(rabbit_vhost).
-
-validate_regexp(RegexpBin) ->
-    Regexp = binary_to_list(RegexpBin),
-    case re:compile(Regexp) of
-        {ok, _}         -> ok;
-        {error, Reason} -> throw({error, {invalid_regexp, Regexp, Reason}})
+check_resource_access(User = #user{username = Username, auth_backend = Module},
+                      Resource, Permission) ->
+    check_access(
+      fun() -> Module:check_resource_access(User, Resource, Permission) end,
+      "~s failed checking resource access to ~p for ~s: ~p~n",
+      [Module, Resource, Username],
+      "access to ~s refused for user '~s'",
+      [rabbit_misc:rs(Resource), Username]).
+
+check_access(Fun, ErrStr, ErrArgs, RefStr, RefArgs) ->
+    Allow = case Fun() of
+                {error, _} = E ->
+                    rabbit_log:error(ErrStr, ErrArgs ++ [E]),
+                    false;
+                Else ->
+                    Else
+            end,
+    case Allow of
+        true ->
+            ok;
+        false ->
+            rabbit_misc:protocol_error(access_refused, RefStr, RefArgs)
     end.
 
-set_permissions(Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm) ->
-    lists:map(fun validate_regexp/1, [ConfigurePerm, WritePerm, ReadPerm]),
-    rabbit_misc:execute_mnesia_transaction(
-      rabbit_misc:with_user_and_vhost(
-        Username, VHostPath,
-        fun () -> ok = mnesia:write(
-                         rabbit_user_permission,
-                         #user_permission{user_vhost = #user_vhost{
-                                            username     = Username,
-                                            virtual_host = VHostPath},
-                                          permission = #permission{
-                                            configure = ConfigurePerm,
-                                            write     = WritePerm,
-                                            read      = ReadPerm}},
-                         write)
-        end)).
-
-
-clear_permissions(Username, VHostPath) ->
-    rabbit_misc:execute_mnesia_transaction(
-      rabbit_misc:with_user_and_vhost(
-        Username, VHostPath,
-        fun () ->
-                ok = mnesia:delete({rabbit_user_permission,
-                                    #user_vhost{username     = Username,
-                                                virtual_host = VHostPath}})
-        end)).
-
-list_permissions() ->
-    [{Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm} ||
-        {Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm} <-
-            list_permissions(match_user_vhost('_', '_'))].
-
-list_vhost_permissions(VHostPath) ->
-    [{Username, ConfigurePerm, WritePerm, ReadPerm} ||
-        {Username, _, ConfigurePerm, WritePerm, ReadPerm} <-
-            list_permissions(rabbit_misc:with_vhost(
-                               VHostPath, match_user_vhost('_', VHostPath)))].
-
-list_user_permissions(Username) ->
-    [{VHostPath, ConfigurePerm, WritePerm, ReadPerm} ||
-        {_, VHostPath, ConfigurePerm, WritePerm, ReadPerm} <-
-            list_permissions(rabbit_misc:with_user(
-                               Username, match_user_vhost(Username, '_')))].
-
-list_user_vhost_permissions(Username, VHostPath) ->
-    [{ConfigurePerm, WritePerm, ReadPerm} ||
-        {_, _, ConfigurePerm, WritePerm, ReadPerm} <-
-            list_permissions(rabbit_misc:with_user_and_vhost(
-                               Username, VHostPath,
-                               match_user_vhost(Username, VHostPath)))].
-
-list_permissions(QueryThunk) ->
-    [{Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm} ||
-        #user_permission{user_vhost = #user_vhost{username     = Username,
-                                                  virtual_host = VHostPath},
-                         permission = #permission{ configure = ConfigurePerm,
-                                                   write     = WritePerm,
-                                                   read      = ReadPerm}} <-
-            %% TODO: use dirty ops instead
-            rabbit_misc:execute_mnesia_transaction(QueryThunk)].
-
-match_user_vhost(Username, VHostPath) ->
-    fun () -> mnesia:match_object(
-                rabbit_user_permission,
-                #user_permission{user_vhost = #user_vhost{
-                                   username     = Username,
-                                   virtual_host = VHostPath},
-                                 permission = '_'},
-                read)
-    end.
+%% Permission = write -> log in
+%% Permission = read  -> learn of the existence of (only relevant for
+%%                       management plugin)
+list_vhosts(User = #user{username = Username, auth_backend = Module},
+            Permission) ->
+    lists:filter(
+      fun(VHost) ->
+              case Module:check_vhost_access(User, VHost, Permission) of
+                  {error, _} = E ->
+                      rabbit_log:warning("~w failed checking vhost access "
+                                         "to ~s for ~s: ~p~n",
+                                         [Module, VHost, Username, E]),
+                      false;
+                  Else ->
+                      Else
+              end
+      end, rabbit_vhost:list()).
diff --git a/src/rabbit_alarm.erl b/src/rabbit_alarm.erl
index 53c713e6..37e40981 100644
--- a/src/rabbit_alarm.erl
+++ b/src/rabbit_alarm.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_alarm).
diff --git a/src/rabbit_amqqueue.erl b/src/rabbit_amqqueue.erl
index 5cdd0e3c..ad9e3ce6 100644
--- a/src/rabbit_amqqueue.erl
+++ b/src/rabbit_amqqueue.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_amqqueue).
@@ -34,7 +19,8 @@
 -export([start/0, stop/0, declare/5, delete_immediately/1, delete/3, purge/1]).
 -export([internal_declare/2, internal_delete/1,
          maybe_run_queue_via_backing_queue/2,
-         update_ram_duration/1, set_ram_duration_target/2,
+         maybe_run_queue_via_backing_queue_async/2,
+         sync_timeout/1, update_ram_duration/1, set_ram_duration_target/2,
          set_maximum_since_use/2, maybe_expire/1, drop_expired/1]).
 -export([pseudo_queue/2]).
 -export([lookup/1, with/2, with_or_die/2, assert_equivalence/5,
@@ -48,11 +34,6 @@
 -export([commit_all/3, rollback_all/3, notify_down_all/2, limit_all/3]).
 -export([on_node_down/1]).
 
--import(mnesia).
--import(gen_server2).
--import(lists).
--import(queue).
-
 -include("rabbit.hrl").
 -include_lib("stdlib/include/qlc.hrl").
 
@@ -73,6 +54,8 @@
 -type(ok_or_errors() ::
       'ok' | {'error', [{'error' | 'exit' | 'throw', any()}]}).
 
+-type(queue_or_not_found() :: rabbit_types:amqqueue() | 'not_found').
+
 -spec(start/0 :: () -> 'ok').
 -spec(stop/0 :: () -> 'ok').
 -spec(declare/5 ::
@@ -151,12 +134,15 @@
 -spec(flush_all/2 :: ([pid()], pid()) -> 'ok').
 -spec(internal_declare/2 ::
         (rabbit_types:amqqueue(), boolean())
-        -> rabbit_types:amqqueue() | 'not_found').
+        -> queue_or_not_found() | rabbit_misc:thunk(queue_or_not_found())).
 -spec(internal_delete/1 ::
         (name()) -> rabbit_types:ok_or_error('not_found') |
                     rabbit_types:connection_exit()).
 -spec(maybe_run_queue_via_backing_queue/2 ::
-        (pid(), (fun ((A) -> A))) -> 'ok').
+        (pid(), (fun ((A) -> {[rabbit_guid:guid()], A}))) -> 'ok').
+-spec(maybe_run_queue_via_backing_queue_async/2 ::
+        (pid(), (fun ((A) -> {[rabbit_guid:guid()], A}))) -> 'ok').
+-spec(sync_timeout/1 :: (pid()) -> 'ok').
 -spec(update_ram_duration/1 :: (pid()) -> 'ok').
 -spec(set_ram_duration_target/2 :: (pid(), number() | 'infinity') -> 'ok').
 -spec(set_maximum_since_use/2 :: (pid(), non_neg_integer()) -> 'ok').
@@ -214,26 +200,23 @@ declare(QueueName, Durable, AutoDelete, Args, Owner) ->
         Q1        -> Q1
     end.
 
-internal_declare(Q = #amqqueue{name = QueueName}, Recover) ->
-    rabbit_misc:execute_mnesia_transaction(
+internal_declare(Q, true) ->
+    rabbit_misc:execute_mnesia_tx_with_tail(
+      fun () -> ok = store_queue(Q), rabbit_misc:const(Q) end);
+internal_declare(Q = #amqqueue{name = QueueName}, false) ->
+    rabbit_misc:execute_mnesia_tx_with_tail(
       fun () ->
-              case Recover of
-                  true ->
-                      ok = store_queue(Q),
-                      Q;
-                  false ->
-                      case mnesia:wread({rabbit_queue, QueueName}) of
-                          [] ->
-                              case mnesia:read({rabbit_durable_queue,
-                                                QueueName}) of
-                                  []  -> ok = store_queue(Q),
-                                         ok = add_default_binding(Q),
-                                         Q;
-                                  [_] -> not_found %% Q exists on stopped node
-                              end;
-                          [ExistingQ] ->
-                              ExistingQ
-                      end
+              case mnesia:wread({rabbit_queue, QueueName}) of
+                  [] ->
+                      case mnesia:read({rabbit_durable_queue, QueueName}) of
+                          []  -> ok = store_queue(Q),
+                                 B = add_default_binding(Q),
+                                 fun (Tx) -> B(Tx), Q end;
+                          [_] -> %% Q exists on stopped node
+                                 rabbit_misc:const(not_found)
+                      end;
+                  [ExistingQ] ->
+                      rabbit_misc:const(ExistingQ)
               end
       end).
 
@@ -279,7 +262,7 @@ assert_equivalence(#amqqueue{durable     = Durable,
 assert_equivalence(#amqqueue{name = QueueName},
                    _Durable, _AutoDelete, _RequiredArgs, _Owner) ->
     rabbit_misc:protocol_error(
-      not_allowed, "parameters for ~s not equivalent",
+      precondition_failed, "parameters for ~s not equivalent",
       [rabbit_misc:rs(QueueName)]).
 
 check_exclusive_access(Q, Owner) -> check_exclusive_access(Q, Owner, lax).
@@ -380,16 +363,13 @@ delete(#amqqueue{ pid = QPid }, IfUnused, IfEmpty) ->
 
 purge(#amqqueue{ pid = QPid }) -> delegate_call(QPid, purge, infinity).
 
-deliver(QPid, #delivery{immediate = true,
-                        txn = Txn, sender = ChPid, message = Message}) ->
-    gen_server2:call(QPid, {deliver_immediately, Txn, Message, ChPid},
-                     infinity);
-deliver(QPid, #delivery{mandatory = true,
-                        txn = Txn, sender = ChPid, message = Message}) ->
-    gen_server2:call(QPid, {deliver, Txn, Message, ChPid}, infinity),
+deliver(QPid, Delivery = #delivery{immediate = true}) ->
+    gen_server2:call(QPid, {deliver_immediately, Delivery}, infinity);
+deliver(QPid, Delivery = #delivery{mandatory = true}) ->
+    gen_server2:call(QPid, {deliver, Delivery}, infinity),
     true;
-deliver(QPid, #delivery{txn = Txn, sender = ChPid, message = Message}) ->
-    gen_server2:cast(QPid, {deliver, Txn, Message, ChPid}),
+deliver(QPid, Delivery) ->
+    gen_server2:cast(QPid, {deliver, Delivery}),
     true.
 
 requeue(QPid, MsgIds, ChPid) ->
@@ -452,20 +432,28 @@ internal_delete1(QueueName) ->
     rabbit_binding:remove_for_destination(QueueName).
 
 internal_delete(QueueName) ->
-    case rabbit_misc:execute_mnesia_transaction(
-           fun () ->
-                   case mnesia:wread({rabbit_queue, QueueName}) of
-                       []  -> {error, not_found};
-                       [_] -> internal_delete1(QueueName)
-                   end
-           end) of
-        {error, _} = Err -> Err;
-        Deletions        -> ok = rabbit_binding:process_deletions(Deletions)
-    end.
+    rabbit_misc:execute_mnesia_transaction(
+      fun () ->
+              case mnesia:wread({rabbit_queue, QueueName}) of
+                  []  -> {error, not_found};
+                  [_] -> internal_delete1(QueueName)
+              end
+      end,
+      fun ({error, _} = Err, _Tx) ->
+              Err;
+          (Deletions, Tx) ->
+              ok = rabbit_binding:process_deletions(Deletions, Tx)
+      end).
 
 maybe_run_queue_via_backing_queue(QPid, Fun) ->
     gen_server2:call(QPid, {maybe_run_queue_via_backing_queue, Fun}, infinity).
 
+maybe_run_queue_via_backing_queue_async(QPid, Fun) ->
+    gen_server2:cast(QPid, {maybe_run_queue_via_backing_queue, Fun}).
+
+sync_timeout(QPid) ->
+    gen_server2:cast(QPid, sync_timeout).
+
 update_ram_duration(QPid) ->
     gen_server2:cast(QPid, update_ram_duration).
 
@@ -482,16 +470,19 @@ drop_expired(QPid) ->
     gen_server2:cast(QPid, drop_expired).
 
 on_node_down(Node) ->
-    rabbit_binding:process_deletions(
-      lists:foldl(
-        fun rabbit_binding:combine_deletions/2,
-        rabbit_binding:new_deletions(),
-        rabbit_misc:execute_mnesia_transaction(
-          fun () -> qlc:e(qlc:q([delete_queue(QueueName) ||
-                                    #amqqueue{name = QueueName, pid = Pid}
-                                        <- mnesia:table(rabbit_queue),
-                                    node(Pid) == Node]))
-          end))).
+    rabbit_misc:execute_mnesia_transaction(
+      fun () -> qlc:e(qlc:q([delete_queue(QueueName) ||
+                                #amqqueue{name = QueueName, pid = Pid}
+                                    <- mnesia:table(rabbit_queue),
+                                node(Pid) == Node]))
+      end,
+      fun (Deletions, Tx) ->
+              rabbit_binding:process_deletions(
+                lists:foldl(fun rabbit_binding:combine_deletions/2,
+                            rabbit_binding:new_deletions(),
+                            Deletions),
+                Tx)
+      end).
 
 delete_queue(QueueName) ->
     ok = mnesia:delete({rabbit_queue, QueueName}),
@@ -505,19 +496,17 @@ pseudo_queue(QueueName, Pid) ->
               pid = Pid}.
 
 safe_delegate_call_ok(F, Pids) ->
-    {_, Bad} = delegate:invoke(Pids,
-                               fun (Pid) ->
+    case delegate:invoke(Pids, fun (Pid) ->
                                        rabbit_misc:with_exit_handler(
                                          fun () -> ok end,
                                          fun () -> F(Pid) end)
-                               end),
-    case Bad of
-        [] -> ok;
-        _  -> {error, Bad}
+                               end) of
+        {_,  []} -> ok;
+        {_, Bad} -> {error, Bad}
     end.
 
 delegate_call(Pid, Msg, Timeout) ->
     delegate:invoke(Pid, fun (P) -> gen_server2:call(P, Msg, Timeout) end).
 
 delegate_cast(Pid, Msg) ->
-    delegate:invoke(Pid, fun (P) -> gen_server2:cast(P, Msg) end).
+    delegate:invoke_no_result(Pid, fun (P) -> gen_server2:cast(P, Msg) end).
diff --git a/src/rabbit_amqqueue_process.erl b/src/rabbit_amqqueue_process.erl
index a999fe58..0346ec7d 100644
--- a/src/rabbit_amqqueue_process.erl
+++ b/src/rabbit_amqqueue_process.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_amqqueue_process).
@@ -39,7 +24,8 @@
 -define(SYNC_INTERVAL,                 5). %% milliseconds
 -define(RAM_DURATION_UPDATE_INTERVAL,  5000).
 
--define(BASE_MESSAGE_PROPERTIES, #message_properties{expiry = undefined}).
+-define(BASE_MESSAGE_PROPERTIES,
+        #message_properties{expiry = undefined, needs_confirming = false}).
 
 -export([start_link/1, info_keys/0]).
 
@@ -47,10 +33,6 @@
          handle_info/2, handle_pre_hibernate/1, prioritise_call/3,
          prioritise_cast/2, prioritise_info/2]).
 
--import(queue).
--import(erlang).
--import(lists).
-
 % Queue's state
 -record(q, {q,
             exclusive_consumer,
@@ -64,6 +46,7 @@
             rate_timer_ref,
             expiry_timer_ref,
             stats_timer,
+            guid_to_channel,
             ttl,
             ttl_timer_ref
            }).
@@ -128,7 +111,8 @@ init(Q) ->
             rate_timer_ref      = undefined,
             expiry_timer_ref    = undefined,
             ttl                 = undefined,
-            stats_timer         = rabbit_event:init_stats_timer()}, hibernate,
+            stats_timer         = rabbit_event:init_stats_timer(),
+            guid_to_channel     = dict:new()}, hibernate,
      {backoff, ?HIBERNATE_AFTER_MIN, ?HIBERNATE_AFTER_MIN, ?DESIRED_HIBERNATE}}.
 
 terminate(shutdown,      State = #q{backing_queue = BQ}) ->
@@ -200,6 +184,8 @@ terminate_shutdown(Fun, State) ->
                                           BQ:tx_rollback(Txn, BQSN),
                                       BQSN1
                               end, BQS, all_ch_record()),
+                     [emit_consumer_deleted(Ch, CTag)
+                      || {Ch, CTag, _} <- consumers(State1)],
                      rabbit_event:notify(queue_deleted, [{pid, self()}]),
                      State1#q{backing_queue_state = Fun(BQS1)}
     end.
@@ -223,11 +209,9 @@ next_state(State) ->
         false -> {stop_sync_timer(State2), hibernate}
     end.
 
-ensure_sync_timer(State = #q{sync_timer_ref = undefined, backing_queue = BQ}) ->
+ensure_sync_timer(State = #q{sync_timer_ref = undefined}) ->
     {ok, TRef} = timer:apply_after(
-                   ?SYNC_INTERVAL,
-                   rabbit_amqqueue, maybe_run_queue_via_backing_queue,
-                   [self(), fun (BQS) -> BQ:idle_timeout(BQS) end]),
+                   ?SYNC_INTERVAL, rabbit_amqqueue, sync_timeout, [self()]),
     State#q{sync_timer_ref = TRef};
 ensure_sync_timer(State) ->
     State.
@@ -348,11 +332,6 @@ ch_record_state_transition(OldCR, NewCR) ->
        true                               -> ok
     end.
 
-record_current_channel_tx(ChPid, Txn) ->
-    %% as a side effect this also starts monitoring the channel (if
-    %% that wasn't happening already)
-    store_ch_record((ch_record(ChPid))#cr{txn = Txn}).
-
 deliver_msgs_to_consumers(Funs = {PredFun, DeliverFun}, FunAcc,
                           State = #q{q = #amqqueue{name = QName},
                                      active_consumers = ActiveConsumers,
@@ -373,11 +352,11 @@ deliver_msgs_to_consumers(Funs = {PredFun, DeliverFun}, FunAcc,
                     rabbit_channel:deliver(
                       ChPid, ConsumerTag, AckRequired,
                       {QName, self(), AckTag, IsDelivered, Message}),
-                    ChAckTags1 = case AckRequired of
-                                     true  -> sets:add_element(
-                                                AckTag, ChAckTags);
-                                     false -> ChAckTags
-                                 end,
+                    ChAckTags1 =
+                        case AckRequired of
+                            true  -> sets:add_element(AckTag, ChAckTags);
+                            false -> ChAckTags
+                        end,
                     NewC = C#cr{unsent_message_count = Count + 1,
                                 acktags = ChAckTags1},
                     true = maybe_store_ch_record(NewC),
@@ -424,6 +403,49 @@ deliver_from_queue_deliver(AckRequired, false, State) ->
         fetch(AckRequired, State),
     {{Message, IsDelivered, AckTag}, 0 == Remaining, State1}.
 
+confirm_messages(Guids, State = #q{guid_to_channel = GTC}) ->
+    {CMs, GTC1} =
+        lists:foldl(
+          fun(Guid, {CMs, GTC0}) ->
+                  case dict:find(Guid, GTC0) of
+                      {ok, {ChPid, MsgSeqNo}} ->
+                          {[{ChPid, MsgSeqNo} | CMs], dict:erase(Guid, GTC0)};
+                      _ ->
+                          {CMs, GTC0}
+                  end
+          end, {[], GTC}, Guids),
+    case lists:usort(CMs) of
+        [{Ch, MsgSeqNo} | CMs1] ->
+            [rabbit_channel:confirm(ChPid, MsgSeqNos) ||
+                {ChPid, MsgSeqNos} <- group_confirms_by_channel(
+                                        CMs1, [{Ch, [MsgSeqNo]}])];
+        [] ->
+            ok
+    end,
+    State#q{guid_to_channel = GTC1}.
+
+group_confirms_by_channel([], Acc) ->
+    Acc;
+group_confirms_by_channel([{Ch, Msg1} | CMs], [{Ch, Msgs} | Acc]) ->
+    group_confirms_by_channel(CMs, [{Ch, [Msg1 | Msgs]} | Acc]);
+group_confirms_by_channel([{Ch, Msg1} | CMs], Acc) ->
+    group_confirms_by_channel(CMs, [{Ch, [Msg1]} | Acc]).
+
+record_confirm_message(#delivery{msg_seq_no = undefined}, State) ->
+    {no_confirm, State};
+record_confirm_message(#delivery{sender     = ChPid,
+                                 msg_seq_no = MsgSeqNo,
+                                 message    = #basic_message {
+                                   is_persistent = true,
+                                   guid          = Guid}},
+                       State =
+                           #q{guid_to_channel = GTC,
+                              q               = #amqqueue{durable = true}}) ->
+    {confirm,
+     State#q{guid_to_channel = dict:store(Guid, {ChPid, MsgSeqNo}, GTC)}};
+record_confirm_message(_Delivery, State) ->
+    {no_confirm, State}.
+
 run_message_queue(State) ->
     Funs = {fun deliver_from_queue_pred/2,
             fun deliver_from_queue_deliver/3},
@@ -433,7 +455,17 @@ run_message_queue(State) ->
     {_IsEmpty1, State2} = deliver_msgs_to_consumers(Funs, IsEmpty, State1),
     State2.
 
-attempt_delivery(none, _ChPid, Message, State = #q{backing_queue = BQ}) ->
+attempt_delivery(#delivery{txn        = none,
+                           sender     = ChPid,
+                           message    = Message,
+                           msg_seq_no = MsgSeqNo},
+                 {NeedsConfirming, State = #q{backing_queue = BQ}}) ->
+    %% must confirm immediately if it has a MsgSeqNo and not NeedsConfirming
+    case {NeedsConfirming, MsgSeqNo} of
+        {_, undefined}  -> ok;
+        {no_confirm, _} -> rabbit_channel:confirm(ChPid, [MsgSeqNo]);
+        {confirm, _}    -> ok
+    end,
     PredFun = fun (IsEmpty, _State) -> not IsEmpty end,
     DeliverFun =
         fun (AckRequired, false, State1 = #q{backing_queue_state = BQS}) ->
@@ -441,35 +473,48 @@ attempt_delivery(none, _ChPid, Message, State = #q{backing_queue = BQ}) ->
                 %% not being enqueued, so we use an empty
                 %% message_properties.
                 {AckTag, BQS1} =
-                    BQ:publish_delivered(AckRequired, Message,
-                                         ?BASE_MESSAGE_PROPERTIES, BQS),
+                    BQ:publish_delivered(
+                      AckRequired, Message,
+                      (?BASE_MESSAGE_PROPERTIES)#message_properties{
+                        needs_confirming = (NeedsConfirming =:= confirm)},
+                      BQS),
                 {{Message, false, AckTag}, true,
                  State1#q{backing_queue_state = BQS1}}
         end,
-    deliver_msgs_to_consumers({ PredFun, DeliverFun }, false, State);
-attempt_delivery(Txn, ChPid, Message, State = #q{backing_queue       = BQ,
-                                                 backing_queue_state = BQS}) ->
-    record_current_channel_tx(ChPid, Txn),
+    {Delivered, State1} =
+        deliver_msgs_to_consumers({ PredFun, DeliverFun }, false, State),
+    {Delivered, NeedsConfirming, State1};
+attempt_delivery(#delivery{txn = Txn,
+                           sender  = ChPid,
+                           message = Message},
+                 {NeedsConfirming,
+                  State = #q{backing_queue = BQ,
+                            backing_queue_state = BQS}}) ->
+    store_ch_record((ch_record(ChPid))#cr{txn = Txn}),
     {true,
+     NeedsConfirming,
      State#q{backing_queue_state =
                  BQ:tx_publish(Txn, Message, ?BASE_MESSAGE_PROPERTIES, BQS)}}.
 
-deliver_or_enqueue(Txn, ChPid, Message, State = #q{backing_queue = BQ}) ->
-    case attempt_delivery(Txn, ChPid, Message, State) of
-        {true, NewState} ->
-            {true, NewState};
-        {false, NewState} ->
-            %% Txn is none and no unblocked channels with consumers
-            BQS = BQ:publish(Message,
-                             message_properties(State),
-                             State #q.backing_queue_state),
-            {false, ensure_ttl_timer(NewState#q{backing_queue_state = BQS})}
+deliver_or_enqueue(Delivery, State) ->
+    case attempt_delivery(Delivery, record_confirm_message(Delivery, State)) of
+        {true, _, State1} ->
+            {true, State1};
+        {false, NeedsConfirming, State1 = #q{backing_queue = BQ,
+                                             backing_queue_state = BQS}} ->
+            #delivery{message = Message} = Delivery,
+            BQS1 = BQ:publish(Message,
+                              (message_properties(State)) #message_properties{
+                                needs_confirming =
+                                    (NeedsConfirming =:= confirm)},
+                              BQS),
+            {false, ensure_ttl_timer(State1#q{backing_queue_state = BQS1})}
     end.
 
 requeue_and_run(AckTags, State = #q{backing_queue = BQ, ttl=TTL}) ->
     maybe_run_queue_via_backing_queue(
       fun (BQS) ->
-              BQ:requeue(AckTags, reset_msg_expiry_fun(TTL), BQS)
+              {[], BQ:requeue(AckTags, reset_msg_expiry_fun(TTL), BQS)}
       end, State).
 
 fetch(AckRequired, State = #q{backing_queue_state = BQS,
@@ -485,12 +530,19 @@ remove_consumer(ChPid, ConsumerTag, Queue) ->
                  end, Queue).
 
 remove_consumers(ChPid, Queue) ->
-    queue:filter(fun ({CP, _}) -> CP /= ChPid end, Queue).
+    {Kept, Removed} = split_by_channel(ChPid, Queue),
+    [emit_consumer_deleted(Ch, CTag) ||
+        {Ch, #consumer{tag = CTag}} <- queue:to_list(Removed)],
+    Kept.
 
 move_consumers(ChPid, From, To) ->
+    {Kept, Removed} = split_by_channel(ChPid, From),
+    {Kept, queue:join(To, Removed)}.
+
+split_by_channel(ChPid, Queue) ->
     {Kept, Removed} = lists:partition(fun ({CP, _}) -> CP /= ChPid end,
-                                      queue:to_list(From)),
-    {queue:from_list(Kept), queue:join(To, queue:from_list(Removed))}.
+                                      queue:to_list(Queue)),
+    {queue:from_list(Kept), queue:from_list(Removed)}.
 
 possibly_unblock(State, ChPid, Update) ->
     case lookup_ch(ChPid) of
@@ -534,7 +586,7 @@ handle_ch_down(DownPid, State = #q{exclusive_consumer = Holder}) ->
                 true  -> {stop, State1};
                 false -> State2 = case Txn of
                                       none -> State1;
-                                      _    -> rollback_transaction(Txn, ChPid,
+                                      _    -> rollback_transaction(Txn, C,
                                                                    State1)
                                   end,
                          {ok, requeue_and_run(sets:to_list(ChAckTags),
@@ -566,28 +618,27 @@ maybe_send_reply(ChPid, Msg) -> ok = rabbit_channel:send_command(ChPid, Msg).
 qname(#q{q = #amqqueue{name = QName}}) -> QName.
 
 maybe_run_queue_via_backing_queue(Fun, State = #q{backing_queue_state = BQS}) ->
-    run_message_queue(State#q{backing_queue_state = Fun(BQS)}).
-
-commit_transaction(Txn, From, ChPid, State = #q{backing_queue       = BQ,
-                                                backing_queue_state = BQS,
-                                                ttl                 = TTL}) ->
-    {AckTags, BQS1} = BQ:tx_commit(Txn,
-                                   fun () -> gen_server2:reply(From, ok) end,
-                                   reset_msg_expiry_fun(TTL),
-                                   BQS),
-    %% ChPid must be known here because of the participant management
-    %% by the channel.
-    C = #cr{acktags = ChAckTags} = lookup_ch(ChPid),
+    {Guids, BQS1} = Fun(BQS),
+    run_message_queue(
+      confirm_messages(Guids, State#q{backing_queue_state = BQS1})).
+
+commit_transaction(Txn, From, C = #cr{acktags = ChAckTags},
+                   State = #q{backing_queue       = BQ,
+                              backing_queue_state = BQS,
+                              ttl                 = TTL}) ->
+    {AckTags, BQS1} = BQ:tx_commit(
+                        Txn, fun () -> gen_server2:reply(From, ok) end,
+                        reset_msg_expiry_fun(TTL), BQS),
     ChAckTags1 = subtract_acks(ChAckTags, AckTags),
     maybe_store_ch_record(C#cr{acktags = ChAckTags1, txn = none}),
     State#q{backing_queue_state = BQS1}.
 
-rollback_transaction(Txn, ChPid, State = #q{backing_queue = BQ,
-                                            backing_queue_state = BQS}) ->
+rollback_transaction(Txn, C, State = #q{backing_queue = BQ,
+                                        backing_queue_state = BQS}) ->
     {_AckTags, BQS1} = BQ:tx_rollback(Txn, BQS),
     %% Iff we removed acktags from the channel record on ack+txn then
-    %% we would add them back in here (would also require ChPid)
-    record_current_channel_tx(ChPid, none),
+    %% we would add them back in here.
+    maybe_store_ch_record(C#cr{txn = none}),
     State#q{backing_queue_state = BQS1}.
 
 subtract_acks(A, B) when is_list(B) ->
@@ -668,12 +719,34 @@ i(backing_queue_status, #q{backing_queue_state = BQS, backing_queue = BQ}) ->
 i(Item, _) ->
     throw({bad_argument, Item}).
 
+consumers(#q{active_consumers = ActiveConsumers,
+             blocked_consumers = BlockedConsumers}) ->
+    rabbit_misc:queue_fold(
+            fun ({ChPid, #consumer{tag = ConsumerTag,
+                                   ack_required = AckRequired}}, Acc) ->
+                    [{ChPid, ConsumerTag, AckRequired} | Acc]
+            end, [], queue:join(ActiveConsumers, BlockedConsumers)).
+
 emit_stats(State) ->
     emit_stats(State, []).
 
 emit_stats(State, Extra) ->
     rabbit_event:notify(queue_stats, Extra ++ infos(?STATISTICS_KEYS, State)).
 
+emit_consumer_created(ChPid, ConsumerTag, Exclusive, AckRequired) ->
+    rabbit_event:notify(consumer_created,
+                        [{consumer_tag, ConsumerTag},
+                         {exclusive,    Exclusive},
+                         {ack_required, AckRequired},
+                         {channel,      ChPid},
+                         {queue,        self()}]).
+
+emit_consumer_deleted(ChPid, ConsumerTag) ->
+    rabbit_event:notify(consumer_deleted,
+                        [{consumer_tag, ConsumerTag},
+                         {channel,      ChPid},
+                         {queue,        self()}]).
+
 %---------------------------------------------------------------------------
 
 prioritise_call(Msg, _From, _State) ->
@@ -687,18 +760,20 @@ prioritise_call(Msg, _From, _State) ->
 
 prioritise_cast(Msg, _State) ->
     case Msg of
-        update_ram_duration                  -> 8;
-        delete_immediately                   -> 8;
-        {set_ram_duration_target, _Duration} -> 8;
-        {set_maximum_since_use, _Age}        -> 8;
-        maybe_expire                         -> 8;
-        drop_expired                         -> 8;
-        emit_stats                           -> 7;
-        {ack, _Txn, _MsgIds, _ChPid}         -> 7;
-        {reject, _MsgIds, _Requeue, _ChPid}  -> 7;
-        {notify_sent, _ChPid}                -> 7;
-        {unblock, _ChPid}                    -> 7;
-        _                                    -> 0
+        update_ram_duration                       -> 8;
+        delete_immediately                        -> 8;
+        {set_ram_duration_target, _Duration}      -> 8;
+        {set_maximum_since_use, _Age}             -> 8;
+        maybe_expire                              -> 8;
+        drop_expired                              -> 8;
+        emit_stats                                -> 7;
+        {ack, _Txn, _MsgIds, _ChPid}              -> 7;
+        {reject, _MsgIds, _Requeue, _ChPid}       -> 7;
+        {notify_sent, _ChPid}                     -> 7;
+        {unblock, _ChPid}                         -> 7;
+        {maybe_run_queue_via_backing_queue, _Fun} -> 6;
+        sync_timeout                              -> 6;
+        _                                         -> 0
     end.
 
 prioritise_info({'DOWN', _MonitorRef, process, DownPid, _Reason},
@@ -736,16 +811,11 @@ handle_call({info, Items}, _From, State) ->
     catch Error -> reply({error, Error}, State)
     end;
 
-handle_call(consumers, _From,
-            State = #q{active_consumers = ActiveConsumers,
-                       blocked_consumers = BlockedConsumers}) ->
-    reply(rabbit_misc:queue_fold(
-            fun ({ChPid, #consumer{tag = ConsumerTag,
-                                   ack_required = AckRequired}}, Acc) ->
-                    [{ChPid, ConsumerTag, AckRequired} | Acc]
-            end, [], queue:join(ActiveConsumers, BlockedConsumers)), State);
+handle_call(consumers, _From, State) ->
+    reply(consumers(State), State);
 
-handle_call({deliver_immediately, Txn, Message, ChPid}, _From, State) ->
+handle_call({deliver_immediately, Delivery},
+            _From, State) ->
     %% Synchronous, "immediate" delivery mode
     %%
     %% FIXME: Is this correct semantics?
@@ -759,17 +829,22 @@ handle_call({deliver_immediately, Txn, Message, ChPid}, _From, State) ->
     %% just all ready-to-consume queues get the message, with unready
     %% queues discarding the message?
     %%
-    {Delivered, NewState} = attempt_delivery(Txn, ChPid, Message, State),
-    reply(Delivered, NewState);
-
-handle_call({deliver, Txn, Message, ChPid}, _From, State) ->
-    %% Synchronous, "mandatory" delivery mode
-    {Delivered, NewState} = deliver_or_enqueue(Txn, ChPid, Message, State),
-    reply(Delivered, NewState);
+    {Delivered, _NeedsConfirming, State1} =
+        attempt_delivery(Delivery, record_confirm_message(Delivery, State)),
+    reply(Delivered, State1);
+
+handle_call({deliver, Delivery}, From, State) ->
+    %% Synchronous, "mandatory" delivery mode. Reply asap.
+    gen_server2:reply(From, true),
+    {_Delivered, NewState} = deliver_or_enqueue(Delivery, State),
+    noreply(NewState);
 
 handle_call({commit, Txn, ChPid}, From, State) ->
-    NewState = commit_transaction(Txn, From, ChPid, State),
-    noreply(run_message_queue(NewState));
+    case lookup_ch(ChPid) of
+        not_found -> reply(ok, State);
+        C         -> noreply(run_message_queue(
+                               commit_transaction(Txn, From, C, State)))
+    end;
 
 handle_call({notify_down, ChPid}, _From, State) ->
     %% we want to do this synchronously, so that auto_deleted queues
@@ -790,15 +865,18 @@ handle_call({basic_get, ChPid, NoAck}, _From,
         {empty, State2} ->
             reply(empty, State2);
         {{Message, IsDelivered, AckTag, Remaining}, State2} ->
-            case AckRequired of
-                true  -> C = #cr{acktags = ChAckTags} = ch_record(ChPid),
-                         true = maybe_store_ch_record(
-                                  C#cr{acktags = sets:add_element(AckTag,
-                                                                  ChAckTags)});
-                false -> ok
-            end,
+            State3 =
+                case AckRequired of
+                    true  -> C = #cr{acktags = ChAckTags} = ch_record(ChPid),
+                             true = maybe_store_ch_record(
+                                      C#cr{acktags =
+                                               sets:add_element(AckTag,
+                                                                ChAckTags)}),
+                             State2;
+                    false -> State2
+                end,
             Msg = {QName, self(), AckTag, IsDelivered, Message},
-            reply({ok, Remaining, Msg}, State2)
+            reply({ok, Remaining, Msg}, State3)
     end;
 
 handle_call({basic_consume, NoAck, ChPid, LimiterPid,
@@ -838,6 +916,8 @@ handle_call({basic_consume, NoAck, ChPid, LimiterPid,
                                    ChPid, Consumer,
                                    State1#q.active_consumers)})
                 end,
+            emit_consumer_created(ChPid, ConsumerTag, ExclusiveConsume,
+                                  not NoAck),
             reply(ok, State2)
     end;
 
@@ -856,6 +936,7 @@ handle_call({basic_cancel, ChPid, ConsumerTag, OkMsg}, _From,
                        C1#cr{limiter_pid = undefined};
                   _ -> C1
               end),
+            emit_consumer_deleted(ChPid, ConsumerTag),
             ok = maybe_send_reply(ChPid, OkMsg),
             NewState =
                 State#q{exclusive_consumer = cancel_holder(ChPid,
@@ -911,9 +992,18 @@ handle_call({requeue, AckTags, ChPid}, From, State) ->
 handle_call({maybe_run_queue_via_backing_queue, Fun}, _From, State) ->
     reply(ok, maybe_run_queue_via_backing_queue(Fun, State)).
 
-handle_cast({deliver, Txn, Message, ChPid}, State) ->
+
+handle_cast({maybe_run_queue_via_backing_queue, Fun}, State) ->
+    noreply(maybe_run_queue_via_backing_queue(Fun, State));
+
+handle_cast(sync_timeout, State = #q{backing_queue = BQ,
+                                     backing_queue_state = BQS}) ->
+    noreply(State#q{backing_queue_state = BQ:idle_timeout(BQS),
+                    sync_timer_ref = undefined});
+
+handle_cast({deliver, Delivery}, State) ->
     %% Asynchronous, non-"mandatory", non-"immediate" deliver mode.
-    {_Delivered, NewState} = deliver_or_enqueue(Txn, ChPid, Message, State),
+    {_Delivered, NewState} = deliver_or_enqueue(Delivery, State),
     noreply(NewState);
 
 handle_cast({ack, Txn, AckTags, ChPid},
@@ -922,18 +1012,23 @@ handle_cast({ack, Txn, AckTags, ChPid},
         not_found ->
             noreply(State);
         C = #cr{acktags = ChAckTags} ->
-            {C1, BQS1} =
+            {C1, State1} =
                 case Txn of
                     none -> ChAckTags1 = subtract_acks(ChAckTags, AckTags),
-                            {C#cr{acktags = ChAckTags1}, BQ:ack(AckTags, BQS)};
-                    _    -> {C#cr{txn = Txn}, BQ:tx_ack(Txn, AckTags, BQS)}
+                            NewC = C#cr{acktags = ChAckTags1},
+                            BQS1 = BQ:ack(AckTags, BQS),
+                            {NewC, State#q{backing_queue_state = BQS1}};
+                    _    -> BQS1 = BQ:tx_ack(Txn, AckTags, BQS),
+                            {C#cr{txn = Txn},
+                             State#q{backing_queue_state = BQS1}}
                 end,
             maybe_store_ch_record(C1),
-            noreply(State#q{backing_queue_state = BQS1})
+            noreply(State1)
     end;
 
 handle_cast({reject, AckTags, Requeue, ChPid},
-            State = #q{backing_queue = BQ, backing_queue_state = BQS}) ->
+            State = #q{backing_queue       = BQ,
+                       backing_queue_state = BQS}) ->
     case lookup_ch(ChPid) of
         not_found ->
             noreply(State);
@@ -943,12 +1038,15 @@ handle_cast({reject, AckTags, Requeue, ChPid},
             noreply(case Requeue of
                         true  -> requeue_and_run(AckTags, State);
                         false -> BQS1 = BQ:ack(AckTags, BQS),
-                                 State #q { backing_queue_state = BQS1 }
+                                 State#q{backing_queue_state = BQS1}
                     end)
     end;
 
 handle_cast({rollback, Txn, ChPid}, State) ->
-    noreply(rollback_transaction(Txn, ChPid, State));
+    noreply(case lookup_ch(ChPid) of
+                not_found -> State;
+                C         -> rollback_transaction(Txn, C, State)
+            end);
 
 handle_cast(delete_immediately, State) ->
     {stop, normal, State};
@@ -1037,7 +1135,7 @@ handle_info({'DOWN', _MonitorRef, process, DownPid, _Reason}, State) ->
 
 handle_info(timeout, State = #q{backing_queue = BQ}) ->
     noreply(maybe_run_queue_via_backing_queue(
-              fun (BQS) -> BQ:idle_timeout(BQS) end, State));
+              fun (BQS) -> {[], BQ:idle_timeout(BQS)} end, State));
 
 handle_info({'EXIT', _Pid, Reason}, State) ->
     {stop, Reason, State};
diff --git a/src/rabbit_amqqueue_sup.erl b/src/rabbit_amqqueue_sup.erl
index 97d6cef9..1344956e 100644
--- a/src/rabbit_amqqueue_sup.erl
+++ b/src/rabbit_amqqueue_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_amqqueue_sup).
diff --git a/src/rabbit_auth_backend.erl b/src/rabbit_auth_backend.erl
new file mode 100644
index 00000000..09820c5b
--- /dev/null
+++ b/src/rabbit_auth_backend.erl
@@ -0,0 +1,61 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_auth_backend).
+
+-export([behaviour_info/1]).
+
+behaviour_info(callbacks) ->
+    [
+     %% A description proplist as with auth mechanisms,
+     %% exchanges. Currently unused.
+     {description, 0},
+
+     %% Check a user can log in, given a username and a proplist of
+     %% authentication information (e.g. [{password, Password}]).
+     %%
+     %% Possible responses:
+     %% {ok, User}
+     %%     Authentication succeeded, and here's the user record.
+     %% {error, Error}
+     %%     Something went wrong. Log and die.
+     %% {refused, Msg, Args}
+     %%     Client failed authentication. Log and die.
+     {check_user_login, 2},
+
+     %% Given #user, vhost path and permission, can a user access a vhost?
+     %% Permission is read  - learn of the existence of (only relevant for
+     %%                       management plugin)
+     %%            or write - log in
+     %%
+     %% Possible responses:
+     %% true
+     %% false
+     %% {error, Error}
+     %%     Something went wrong. Log and die.
+     {check_vhost_access, 3},
+
+     %% Given #user, resource and permission, can a user access a resource?
+     %%
+     %% Possible responses:
+     %% true
+     %% false
+     %% {error, Error}
+     %%     Something went wrong. Log and die.
+     {check_resource_access, 3}
+    ];
+behaviour_info(_Other) ->
+    undefined.
diff --git a/src/rabbit_auth_backend_internal.erl b/src/rabbit_auth_backend_internal.erl
new file mode 100644
index 00000000..a564480b
--- /dev/null
+++ b/src/rabbit_auth_backend_internal.erl
@@ -0,0 +1,332 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_auth_backend_internal).
+-include("rabbit.hrl").
+
+-behaviour(rabbit_auth_backend).
+
+-export([description/0]).
+-export([check_user_login/2, check_vhost_access/3, check_resource_access/3]).
+
+-export([add_user/2, delete_user/1, change_password/2, set_admin/1,
+         clear_admin/1, list_users/0, lookup_user/1, clear_password/1]).
+-export([make_salt/0, check_password/2, change_password_hash/2,
+         hash_password/1]).
+-export([set_permissions/5, clear_permissions/2,
+         list_permissions/0, list_vhost_permissions/1, list_user_permissions/1,
+         list_user_vhost_permissions/2]).
+
+-include("rabbit_auth_backend_spec.hrl").
+
+-ifdef(use_specs).
+
+-type(regexp() :: binary()).
+
+-spec(add_user/2 :: (rabbit_types:username(), rabbit_types:password()) -> 'ok').
+-spec(delete_user/1 :: (rabbit_types:username()) -> 'ok').
+-spec(change_password/2 :: (rabbit_types:username(), rabbit_types:password())
+                           -> 'ok').
+-spec(clear_password/1 :: (rabbit_types:username()) -> 'ok').
+-spec(make_salt/0 :: () -> binary()).
+-spec(check_password/2 :: (rabbit_types:password(),
+                           rabbit_types:password_hash()) -> boolean()).
+-spec(change_password_hash/2 :: (rabbit_types:username(),
+                                 rabbit_types:password_hash()) -> 'ok').
+-spec(hash_password/1 :: (rabbit_types:password())
+                         -> rabbit_types:password_hash()).
+-spec(set_admin/1 :: (rabbit_types:username()) -> 'ok').
+-spec(clear_admin/1 :: (rabbit_types:username()) -> 'ok').
+-spec(list_users/0 :: () -> [{rabbit_types:username(), boolean()}]).
+-spec(lookup_user/1 :: (rabbit_types:username())
+        -> rabbit_types:ok(rabbit_types:internal_user())
+               | rabbit_types:error('not_found')).
+-spec(set_permissions/5 ::(rabbit_types:username(), rabbit_types:vhost(),
+                           regexp(), regexp(), regexp()) -> 'ok').
+-spec(clear_permissions/2 :: (rabbit_types:username(), rabbit_types:vhost())
+                             -> 'ok').
+-spec(list_permissions/0 ::
+        () -> [{rabbit_types:username(), rabbit_types:vhost(),
+                regexp(), regexp(), regexp()}]).
+-spec(list_vhost_permissions/1 ::
+        (rabbit_types:vhost()) -> [{rabbit_types:username(),
+                                    regexp(), regexp(), regexp()}]).
+-spec(list_user_permissions/1 ::
+        (rabbit_types:username()) -> [{rabbit_types:vhost(),
+                                       regexp(), regexp(), regexp()}]).
+-spec(list_user_vhost_permissions/2 ::
+        (rabbit_types:username(), rabbit_types:vhost())
+        -> [{regexp(), regexp(), regexp()}]).
+
+-endif.
+
+%%----------------------------------------------------------------------------
+
+%% Implementation of rabbit_auth_backend
+
+description() ->
+    [{name, <<"Internal">>},
+     {description, <<"Internal user / password database">>}].
+
+check_user_login(Username, []) ->
+    internal_check_user_login(Username, fun(_) -> true end);
+check_user_login(Username, [{password, Password}]) ->
+    internal_check_user_login(
+      Username,
+      fun(#internal_user{password_hash = Hash}) ->
+              check_password(Password, Hash)
+      end);
+check_user_login(Username, AuthProps) ->
+    exit({unknown_auth_props, Username, AuthProps}).
+
+internal_check_user_login(Username, Fun) ->
+    Refused = {refused, "user '~s' - invalid credentials", [Username]},
+    case lookup_user(Username) of
+        {ok, User = #internal_user{is_admin = IsAdmin}} ->
+            case Fun(User) of
+                true -> {ok, #user{username     = Username,
+                                   is_admin     = IsAdmin,
+                                   auth_backend = ?MODULE,
+                                   impl         = User}};
+                _    -> Refused
+            end;
+        {error, not_found} ->
+            Refused
+    end.
+
+check_vhost_access(#user{is_admin = true},    _VHostPath, read) ->
+    true;
+
+check_vhost_access(#user{username = Username}, VHostPath, _) ->
+    %% TODO: use dirty ops instead
+    rabbit_misc:execute_mnesia_transaction(
+      fun () ->
+              case mnesia:read({rabbit_user_permission,
+                                #user_vhost{username     = Username,
+                                            virtual_host = VHostPath}}) of
+                  []   -> false;
+                  [_R] -> true
+              end
+      end).
+
+check_resource_access(#user{username = Username},
+                      #resource{virtual_host = VHostPath, name = Name},
+                      Permission) ->
+    case mnesia:dirty_read({rabbit_user_permission,
+                            #user_vhost{username     = Username,
+                                        virtual_host = VHostPath}}) of
+        [] ->
+            false;
+        [#user_permission{permission = P}] ->
+            PermRegexp =
+                case element(permission_index(Permission), P) of
+                    %% <<"^$">> breaks Emacs' erlang mode
+                    <<"">> -> <<$^, $$>>;
+                    RE     -> RE
+                end,
+            case re:run(Name, PermRegexp, [{capture, none}]) of
+                match    -> true;
+                nomatch  -> false
+            end
+    end.
+
+permission_index(configure) -> #permission.configure;
+permission_index(write)     -> #permission.write;
+permission_index(read)      -> #permission.read.
+
+%%----------------------------------------------------------------------------
+%% Manipulation of the user database
+
+add_user(Username, Password) ->
+    R = rabbit_misc:execute_mnesia_transaction(
+          fun () ->
+                  case mnesia:wread({rabbit_user, Username}) of
+                      [] ->
+                          ok = mnesia:write(
+                                 rabbit_user,
+                                 #internal_user{username = Username,
+                                                password_hash =
+                                                    hash_password(Password),
+                                                is_admin = false},
+                                 write);
+                      _ ->
+                          mnesia:abort({user_already_exists, Username})
+                  end
+          end),
+    rabbit_log:info("Created user ~p~n", [Username]),
+    R.
+
+delete_user(Username) ->
+    R = rabbit_misc:execute_mnesia_transaction(
+          rabbit_misc:with_user(
+            Username,
+            fun () ->
+                    ok = mnesia:delete({rabbit_user, Username}),
+                    [ok = mnesia:delete_object(
+                            rabbit_user_permission, R, write) ||
+                        R <- mnesia:match_object(
+                               rabbit_user_permission,
+                               #user_permission{user_vhost = #user_vhost{
+                                                  username = Username,
+                                                  virtual_host = '_'},
+                                                permission = '_'},
+                               write)],
+                    ok
+            end)),
+    rabbit_log:info("Deleted user ~p~n", [Username]),
+    R.
+
+change_password(Username, Password) ->
+    change_password_hash(Username, hash_password(Password)).
+
+clear_password(Username) ->
+    change_password_hash(Username, <<"">>).
+
+change_password_hash(Username, PasswordHash) ->
+    R = update_user(Username, fun(User) ->
+                                      User#internal_user{
+                                        password_hash = PasswordHash }
+                              end),
+    rabbit_log:info("Changed password for user ~p~n", [Username]),
+    R.
+
+hash_password(Cleartext) ->
+    Salt = make_salt(),
+    Hash = salted_md5(Salt, Cleartext),
+    <<Salt/binary, Hash/binary>>.
+
+check_password(Cleartext, <<Salt:4/binary, Hash/binary>>) ->
+    Hash =:= salted_md5(Salt, Cleartext).
+
+make_salt() ->
+    {A1,A2,A3} = now(),
+    random:seed(A1, A2, A3),
+    Salt = random:uniform(16#ffffffff),
+    <<Salt:32>>.
+
+salted_md5(Salt, Cleartext) ->
+    Salted = <<Salt/binary, Cleartext/binary>>,
+    erlang:md5(Salted).
+
+set_admin(Username) ->
+    set_admin(Username, true).
+
+clear_admin(Username) ->
+    set_admin(Username, false).
+
+set_admin(Username, IsAdmin) ->
+    R = update_user(Username, fun(User) ->
+                                      User#internal_user{is_admin = IsAdmin}
+                              end),
+    rabbit_log:info("Set user admin flag for user ~p to ~p~n",
+                    [Username, IsAdmin]),
+    R.
+
+update_user(Username, Fun) ->
+    rabbit_misc:execute_mnesia_transaction(
+      rabbit_misc:with_user(
+        Username,
+        fun () ->
+                {ok, User} = lookup_user(Username),
+                ok = mnesia:write(rabbit_user, Fun(User), write)
+        end)).
+
+list_users() ->
+    [{Username, IsAdmin} ||
+        #internal_user{username = Username, is_admin = IsAdmin} <-
+            mnesia:dirty_match_object(rabbit_user, #internal_user{_ = '_'})].
+
+lookup_user(Username) ->
+    rabbit_misc:dirty_read({rabbit_user, Username}).
+
+validate_regexp(RegexpBin) ->
+    Regexp = binary_to_list(RegexpBin),
+    case re:compile(Regexp) of
+        {ok, _}         -> ok;
+        {error, Reason} -> throw({error, {invalid_regexp, Regexp, Reason}})
+    end.
+
+set_permissions(Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm) ->
+    lists:map(fun validate_regexp/1, [ConfigurePerm, WritePerm, ReadPerm]),
+    rabbit_misc:execute_mnesia_transaction(
+      rabbit_misc:with_user_and_vhost(
+        Username, VHostPath,
+        fun () -> ok = mnesia:write(
+                         rabbit_user_permission,
+                         #user_permission{user_vhost = #user_vhost{
+                                            username     = Username,
+                                            virtual_host = VHostPath},
+                                          permission = #permission{
+                                            configure = ConfigurePerm,
+                                            write     = WritePerm,
+                                            read      = ReadPerm}},
+                         write)
+        end)).
+
+
+clear_permissions(Username, VHostPath) ->
+    rabbit_misc:execute_mnesia_transaction(
+      rabbit_misc:with_user_and_vhost(
+        Username, VHostPath,
+        fun () ->
+                ok = mnesia:delete({rabbit_user_permission,
+                                    #user_vhost{username     = Username,
+                                                virtual_host = VHostPath}})
+        end)).
+
+list_permissions() ->
+    [{Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm} ||
+        {Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm} <-
+            list_permissions(match_user_vhost('_', '_'))].
+
+list_vhost_permissions(VHostPath) ->
+    [{Username, ConfigurePerm, WritePerm, ReadPerm} ||
+        {Username, _, ConfigurePerm, WritePerm, ReadPerm} <-
+            list_permissions(rabbit_vhost:with(
+                               VHostPath, match_user_vhost('_', VHostPath)))].
+
+list_user_permissions(Username) ->
+    [{VHostPath, ConfigurePerm, WritePerm, ReadPerm} ||
+        {_, VHostPath, ConfigurePerm, WritePerm, ReadPerm} <-
+            list_permissions(rabbit_misc:with_user(
+                               Username, match_user_vhost(Username, '_')))].
+
+list_user_vhost_permissions(Username, VHostPath) ->
+    [{ConfigurePerm, WritePerm, ReadPerm} ||
+        {_, _, ConfigurePerm, WritePerm, ReadPerm} <-
+            list_permissions(rabbit_misc:with_user_and_vhost(
+                               Username, VHostPath,
+                               match_user_vhost(Username, VHostPath)))].
+
+list_permissions(QueryThunk) ->
+    [{Username, VHostPath, ConfigurePerm, WritePerm, ReadPerm} ||
+        #user_permission{user_vhost = #user_vhost{username     = Username,
+                                                  virtual_host = VHostPath},
+                         permission = #permission{ configure = ConfigurePerm,
+                                                   write     = WritePerm,
+                                                   read      = ReadPerm}} <-
+            %% TODO: use dirty ops instead
+            rabbit_misc:execute_mnesia_transaction(QueryThunk)].
+
+match_user_vhost(Username, VHostPath) ->
+    fun () -> mnesia:match_object(
+                rabbit_user_permission,
+                #user_permission{user_vhost = #user_vhost{
+                                   username     = Username,
+                                   virtual_host = VHostPath},
+                                 permission = '_'},
+                read)
+    end.
diff --git a/src/rabbit_auth_mechanism.erl b/src/rabbit_auth_mechanism.erl
new file mode 100644
index 00000000..1d14f9f0
--- /dev/null
+++ b/src/rabbit_auth_mechanism.erl
@@ -0,0 +1,42 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_auth_mechanism).
+
+-export([behaviour_info/1]).
+
+behaviour_info(callbacks) ->
+    [
+     %% A description.
+     {description, 0},
+
+     %% Called before authentication starts. Should create a state
+     %% object to be passed through all the stages of authentication.
+     {init, 1},
+
+     %% Handle a stage of authentication. Possible responses:
+     %% {ok, User}
+     %%     Authentication succeeded, and here's the user record.
+     %% {challenge, Challenge, NextState}
+     %%     Another round is needed. Here's the state I want next time.
+     %% {protocol_error, Msg, Args}
+     %%     Client got the protocol wrong. Log and die.
+     %% {refused, Msg, Args}
+     %%     Client failed authentication. Log and die.
+     {handle_response, 2}
+    ];
+behaviour_info(_Other) ->
+    undefined.
diff --git a/src/rabbit_auth_mechanism_amqplain.erl b/src/rabbit_auth_mechanism_amqplain.erl
new file mode 100644
index 00000000..5e422eee
--- /dev/null
+++ b/src/rabbit_auth_mechanism_amqplain.erl
@@ -0,0 +1,55 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_auth_mechanism_amqplain).
+-include("rabbit.hrl").
+
+-behaviour(rabbit_auth_mechanism).
+
+-export([description/0, init/1, handle_response/2]).
+
+-include("rabbit_auth_mechanism_spec.hrl").
+
+-rabbit_boot_step({?MODULE,
+                   [{description, "auth mechanism amqplain"},
+                    {mfa,         {rabbit_registry, register,
+                                   [auth_mechanism, <<"AMQPLAIN">>, ?MODULE]}},
+                    {requires,    rabbit_registry},
+                    {enables,     kernel_ready}]}).
+
+%% AMQPLAIN, as used by Qpid Python test suite. The 0-8 spec actually
+%% defines this as PLAIN, but in 0-9 that definition is gone, instead
+%% referring generically to "SASL security mechanism", i.e. the above.
+
+description() ->
+    [{name, <<"AMQPLAIN">>},
+     {description, <<"QPid AMQPLAIN mechanism">>}].
+
+init(_Sock) ->
+    [].
+
+handle_response(Response, _State) ->
+    LoginTable = rabbit_binary_parser:parse_table(Response),
+    case {lists:keysearch(<<"LOGIN">>, 1, LoginTable),
+          lists:keysearch(<<"PASSWORD">>, 1, LoginTable)} of
+        {{value, {_, longstr, User}},
+         {value, {_, longstr, Pass}}} ->
+            rabbit_access_control:check_user_pass_login(User, Pass);
+        _ ->
+            {protocol_error,
+             "AMQPLAIN auth info ~w is missing LOGIN or PASSWORD field",
+              [LoginTable]}
+    end.
diff --git a/src/rabbit_auth_mechanism_cr_demo.erl b/src/rabbit_auth_mechanism_cr_demo.erl
new file mode 100644
index 00000000..7fd20f8b
--- /dev/null
+++ b/src/rabbit_auth_mechanism_cr_demo.erl
@@ -0,0 +1,59 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_auth_mechanism_cr_demo).
+-include("rabbit.hrl").
+
+-behaviour(rabbit_auth_mechanism).
+
+-export([description/0, init/1, handle_response/2]).
+
+-include("rabbit_auth_mechanism_spec.hrl").
+
+-rabbit_boot_step({?MODULE,
+                   [{description, "auth mechanism cr-demo"},
+                    {mfa,         {rabbit_registry, register,
+                                   [auth_mechanism, <<"RABBIT-CR-DEMO">>,
+                                    ?MODULE]}},
+                    {requires,    rabbit_registry},
+                    {enables,     kernel_ready}]}).
+
+-record(state, {username = undefined}).
+
+%% Provides equivalent security to PLAIN but demos use of Connection.Secure(Ok)
+%% START-OK: Username
+%% SECURE: "Please tell me your password"
+%% SECURE-OK: "My password is ~s", [Password]
+
+description() ->
+    [{name, <<"RABBIT-CR-DEMO">>},
+     {description, <<"RabbitMQ Demo challenge-response authentication "
+                     "mechanism">>}].
+
+init(_Sock) ->
+    #state{}.
+
+handle_response(Response, State = #state{username = undefined}) ->
+    {challenge, <<"Please tell me your password">>,
+     State#state{username = Response}};
+
+handle_response(Response, #state{username = Username}) ->
+    case Response of
+        <<"My password is ", Password/binary>> ->
+            rabbit_access_control:check_user_pass_login(Username, Password);
+        _ ->
+            {protocol_error, "Invalid response '~s'", [Response]}
+    end.
diff --git a/src/rabbit_auth_mechanism_plain.erl b/src/rabbit_auth_mechanism_plain.erl
new file mode 100644
index 00000000..7d9dcd20
--- /dev/null
+++ b/src/rabbit_auth_mechanism_plain.erl
@@ -0,0 +1,51 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_auth_mechanism_plain).
+-include("rabbit.hrl").
+
+-behaviour(rabbit_auth_mechanism).
+
+-export([description/0, init/1, handle_response/2]).
+
+-include("rabbit_auth_mechanism_spec.hrl").
+
+-rabbit_boot_step({?MODULE,
+                   [{description, "auth mechanism plain"},
+                    {mfa,         {rabbit_registry, register,
+                                   [auth_mechanism, <<"PLAIN">>, ?MODULE]}},
+                    {requires,    rabbit_registry},
+                    {enables,     kernel_ready}]}).
+
+%% SASL PLAIN, as used by the Qpid Java client and our clients. Also,
+%% apparently, by OpenAMQ.
+
+description() ->
+    [{name, <<"PLAIN">>},
+     {description, <<"SASL PLAIN authentication mechanism">>}].
+
+init(_Sock) ->
+    [].
+
+handle_response(Response, _State) ->
+    %% The '%%"' at the end of the next line is for Emacs
+    case re:run(Response, "^\\0([^\\0]*)\\0([^\\0]*)$",%%"
+                [{capture, all_but_first, binary}]) of
+        {match, [User, Pass]} ->
+            rabbit_access_control:check_user_pass_login(User, Pass);
+        _ ->
+            {protocol_error, "response ~p invalid", [Response]}
+    end.
diff --git a/src/rabbit_backing_queue.erl b/src/rabbit_backing_queue.erl
index 352e76fd..6a21e10f 100644
--- a/src/rabbit_backing_queue.erl
+++ b/src/rabbit_backing_queue.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_backing_queue).
@@ -77,7 +62,7 @@ behaviour_info(callbacks) ->
      {fetch, 2},
 
      %% Acktags supplied are for messages which can now be forgotten
-     %% about.
+     %% about. Must return 1 guid per Ack, in the same order as Acks.
      {ack, 2},
 
      %% A publish, but in the context of a transaction.
diff --git a/src/rabbit_basic.erl b/src/rabbit_basic.erl
index 38412982..c5bd9575 100644
--- a/src/rabbit_basic.erl
+++ b/src/rabbit_basic.erl
@@ -1,39 +1,24 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_basic).
 -include("rabbit.hrl").
 -include("rabbit_framing.hrl").
 
--export([publish/1, message/4, properties/1, delivery/4]).
+-export([publish/1, message/4, properties/1, delivery/5]).
 -export([publish/4, publish/7]).
 -export([build_content/2, from_content/1]).
 -export([is_message_persistent/1]).
@@ -50,9 +35,10 @@
 
 -spec(publish/1 ::
         (rabbit_types:delivery()) -> publish_result()).
--spec(delivery/4 ::
+-spec(delivery/5 ::
         (boolean(), boolean(), rabbit_types:maybe(rabbit_types:txn()),
-         rabbit_types:message()) -> rabbit_types:delivery()).
+         rabbit_types:message(), undefined | integer()) ->
+                         rabbit_types:delivery()).
 -spec(message/4 ::
         (rabbit_exchange:name(), rabbit_router:routing_key(),
          properties_input(), binary()) ->
@@ -88,9 +74,9 @@ publish(Delivery = #delivery{
             Other
     end.
 
-delivery(Mandatory, Immediate, Txn, Message) ->
+delivery(Mandatory, Immediate, Txn, Message, MsgSeqNo) ->
     #delivery{mandatory = Mandatory, immediate = Immediate, txn = Txn,
-              sender = self(), message = Message}.
+              sender = self(), message = Message, msg_seq_no = MsgSeqNo}.
 
 build_content(Properties, BodyBin) ->
     %% basic.publish hasn't changed so we can just hard-code amqp_0_9_1
@@ -157,7 +143,8 @@ publish(ExchangeName, RoutingKeyBin, Mandatory, Immediate, Txn, Properties,
         BodyBin) ->
     publish(delivery(Mandatory, Immediate, Txn,
                      message(ExchangeName, RoutingKeyBin,
-                             properties(Properties), BodyBin))).
+                             properties(Properties), BodyBin),
+                     undefined)).
 
 is_message_persistent(#content{properties = #'P_basic'{
                                  delivery_mode = Mode}}) ->
diff --git a/src/rabbit_binary_generator.erl b/src/rabbit_binary_generator.erl
index b2997ae2..d67c7f58 100644
--- a/src/rabbit_binary_generator.erl
+++ b/src/rabbit_binary_generator.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_binary_generator).
@@ -49,8 +34,6 @@
 -export([ensure_content_encoded/2, clear_encoded_content/1]).
 -export([map_exception/3]).
 
--import(lists).
-
 %%----------------------------------------------------------------------------
 
 -ifdef(use_specs).
@@ -346,8 +329,7 @@ lookup_amqp_exception(#amqp_error{name        = Name,
     {ShouldClose, Code, ExplBin, Method};
 lookup_amqp_exception(Other, Protocol) ->
     rabbit_log:warning("Non-AMQP exit reason '~p'~n", [Other]),
-    {ShouldClose, Code, Text} =
-        Protocol:lookup_amqp_exception(internal_error, Protocol),
+    {ShouldClose, Code, Text} = Protocol:lookup_amqp_exception(internal_error),
     {ShouldClose, Code, Text, none}.
 
 amqp_exception_explanation(Text, Expl) ->
diff --git a/src/rabbit_binary_parser.erl b/src/rabbit_binary_parser.erl
index ebf063f0..88026bab 100644
--- a/src/rabbit_binary_parser.erl
+++ b/src/rabbit_binary_parser.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_binary_parser).
@@ -36,8 +21,6 @@
 -export([parse_table/1, parse_properties/2]).
 -export([ensure_content_decoded/1, clear_decoded_content/1]).
 
--import(lists).
-
 %%----------------------------------------------------------------------------
 
 -ifdef(use_specs).
diff --git a/src/rabbit_binding.erl b/src/rabbit_binding.erl
index 9d1399f7..b270927b 100644
--- a/src/rabbit_binding.erl
+++ b/src/rabbit_binding.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_binding).
@@ -36,7 +21,7 @@
 -export([list_for_source/1, list_for_destination/1,
          list_for_source_and_destination/2]).
 -export([new_deletions/0, combine_deletions/2, add_deletion/3,
-         process_deletions/1]).
+         process_deletions/2]).
 -export([info_keys/0, info/1, info/2, info_all/1, info_all/2]).
 %% these must all be run inside a mnesia tx
 -export([has_for_source/1, remove_for_source/1,
@@ -59,17 +44,18 @@
              rabbit_types:exchange() | rabbit_types:amqqueue()) ->
                    rabbit_types:ok_or_error(rabbit_types:amqp_error()))).
 -type(bindings() :: [rabbit_types:binding()]).
+-type(add_res() :: bind_res() | rabbit_misc:const(bind_res())).
+-type(bind_or_error() :: bind_res() | rabbit_types:error('binding_not_found')).
+-type(remove_res() :: bind_or_error() | rabbit_misc:const(bind_or_error())).
 
 -opaque(deletions() :: dict()).
 
 -spec(recover/0 :: () -> [rabbit_types:binding()]).
 -spec(exists/1 :: (rabbit_types:binding()) -> boolean() | bind_errors()).
--spec(add/1 :: (rabbit_types:binding()) -> bind_res()).
--spec(remove/1 :: (rabbit_types:binding()) ->
-                       bind_res() | rabbit_types:error('binding_not_found')).
--spec(add/2 :: (rabbit_types:binding(), inner_fun()) -> bind_res()).
--spec(remove/2 :: (rabbit_types:binding(), inner_fun()) ->
-                       bind_res() | rabbit_types:error('binding_not_found')).
+-spec(add/1 :: (rabbit_types:binding()) -> add_res()).
+-spec(remove/1 :: (rabbit_types:binding()) -> remove_res()).
+-spec(add/2 :: (rabbit_types:binding(), inner_fun()) -> add_res()).
+-spec(remove/2 :: (rabbit_types:binding(), inner_fun()) -> remove_res()).
 -spec(list/1 :: (rabbit_types:vhost()) -> bindings()).
 -spec(list_for_source/1 ::
         (rabbit_types:binding_source()) -> bindings()).
@@ -91,7 +77,7 @@
         (rabbit_types:binding_destination()) -> deletions()).
 -spec(remove_transient_for_destination/1 ::
         (rabbit_types:binding_destination()) -> deletions()).
--spec(process_deletions/1 :: (deletions()) -> 'ok').
+-spec(process_deletions/2 :: (deletions(), boolean()) -> 'ok').
 -spec(combine_deletions/2 :: (deletions(), deletions()) -> deletions()).
 -spec(add_deletion/3 :: (rabbit_exchange:name(),
                          {'undefined' | rabbit_types:exchange(),
@@ -118,69 +104,66 @@ recover() ->
 
 exists(Binding) ->
     binding_action(
-      Binding,
-      fun (_Src, _Dst, B) -> mnesia:read({rabbit_route, B}) /= [] end).
+      Binding, fun (_Src, _Dst, B) ->
+                       rabbit_misc:const(mnesia:read({rabbit_route, B}) /= [])
+               end).
 
 add(Binding) -> add(Binding, fun (_Src, _Dst) -> ok end).
 
 remove(Binding) -> remove(Binding, fun (_Src, _Dst) -> ok end).
 
 add(Binding, InnerFun) ->
-    case binding_action(
-           Binding,
-           fun (Src, Dst, B) ->
-                   %% this argument is used to check queue exclusivity;
-                   %% in general, we want to fail on that in preference to
-                   %% anything else
-                   case InnerFun(Src, Dst) of
-                       ok ->
-                           case mnesia:read({rabbit_route, B}) of
-                               []  -> ok = sync_binding(
-                                             B, all_durable([Src, Dst]),
-                                             fun mnesia:write/3),
-                                      {new, Src, B};
-                               [_] -> {existing, Src, B}
-                           end;
-                       {error, _} = E ->
-                           E
-                   end
-           end) of
-        {new, Src = #exchange{ type = Type }, B} ->
-            ok = (type_to_module(Type)):add_binding(Src, B),
-            rabbit_event:notify(binding_created, info(B));
-        {existing, _, _} ->
-            ok;
-        {error, _} = Err ->
-            Err
-    end.
+    binding_action(
+      Binding,
+      fun (Src, Dst, B) ->
+              %% this argument is used to check queue exclusivity;
+              %% in general, we want to fail on that in preference to
+              %% anything else
+              case InnerFun(Src, Dst) of
+                  ok ->
+                      case mnesia:read({rabbit_route, B}) of
+                          []  -> ok = sync_binding(B, all_durable([Src, Dst]),
+                                                   fun mnesia:write/3),
+                                 fun (Tx) ->
+                                         ok = rabbit_exchange:callback(
+                                                Src, add_binding, [Tx, Src, B]),
+                                         rabbit_event:notify_if(
+                                           not Tx, binding_created, info(B))
+                                 end;
+                          [_] -> fun rabbit_misc:const_ok/1
+                      end;
+                  {error, _} = Err ->
+                      rabbit_misc:const(Err)
+              end
+      end).
 
 remove(Binding, InnerFun) ->
-    case binding_action(
-           Binding,
-           fun (Src, Dst, B) ->
-                   case mnesia:match_object(rabbit_route, #route{binding = B},
-                                            write) of
-                       [] ->
-                           {error, binding_not_found};
-                       [_] ->
-                           case InnerFun(Src, Dst) of
-                               ok ->
-                                   ok = sync_binding(
-                                          B, all_durable([Src, Dst]),
-                                          fun mnesia:delete_object/3),
-                                   {ok,
-                                    maybe_auto_delete(B#binding.source,
-                                                      [B], new_deletions())};
-                               {error, _} = E ->
-                                   E
-                           end
-                   end
-           end) of
-        {error, _} = Err ->
-            Err;
-        {ok, Deletions} ->
-            ok = process_deletions(Deletions)
-    end.
+    binding_action(
+      Binding,
+      fun (Src, Dst, B) ->
+              Result =
+                  case mnesia:match_object(rabbit_route, #route{binding = B},
+                                           write) of
+                      [] ->
+                          {error, binding_not_found};
+                      [_] ->
+                          case InnerFun(Src, Dst) of
+                              ok ->
+                                  ok = sync_binding(B, all_durable([Src, Dst]),
+                                                    fun mnesia:delete_object/3),
+                                  {ok, maybe_auto_delete(B#binding.source,
+                                                         [B], new_deletions())};
+                              {error, _} = E ->
+                                  E
+                          end
+                  end,
+              case Result of
+                  {error, _} = Err ->
+                      rabbit_misc:const(Err);
+                  {ok, Deletions} ->
+                      fun (Tx) -> ok = process_deletions(Deletions, Tx) end
+              end
+      end).
 
 list(VHostPath) ->
     VHostResource = rabbit_misc:r(VHostPath, '_'),
@@ -290,24 +273,22 @@ sync_binding(Binding, Durable, Fun) ->
 call_with_source_and_destination(SrcName, DstName, Fun) ->
     SrcTable = table_for_resource(SrcName),
     DstTable = table_for_resource(DstName),
-    rabbit_misc:execute_mnesia_transaction(
-      fun () -> case {mnesia:read({SrcTable, SrcName}),
-                      mnesia:read({DstTable, DstName})} of
-                    {[Src], [Dst]} -> Fun(Src, Dst);
-                    {[],    [_]  } -> {error, source_not_found};
-                    {[_],   []   } -> {error, destination_not_found};
-                    {[],    []   } -> {error, source_and_destination_not_found}
-                end
+    ErrFun = fun (Err) -> rabbit_misc:const(Err) end,
+    rabbit_misc:execute_mnesia_tx_with_tail(
+      fun () ->
+              case {mnesia:read({SrcTable, SrcName}),
+                    mnesia:read({DstTable, DstName})} of
+                  {[Src], [Dst]} -> Fun(Src, Dst);
+                  {[],    [_]  } -> ErrFun({error, source_not_found});
+                  {[_],   []   } -> ErrFun({error, destination_not_found});
+                  {[],    []   } -> ErrFun({error,
+                                            source_and_destination_not_found})
+              end
       end).
 
 table_for_resource(#resource{kind = exchange}) -> rabbit_exchange;
 table_for_resource(#resource{kind = queue})    -> rabbit_queue.
 
-%% Used with atoms from records; e.g., the type is expected to exist.
-type_to_module(T) ->
-    {ok, Module} = rabbit_exchange_type_registry:lookup_module(T),
-    Module.
-
 contains(Table, MatchHead) ->
     continue(mnesia:select(Table, [{MatchHead, [], ['$_']}], 1, read)).
 
@@ -350,10 +331,10 @@ group_bindings_fold(Fun, SrcName, Acc, Removed, Bindings) ->
     group_bindings_fold(Fun, Fun(SrcName, Bindings, Acc), Removed).
 
 maybe_auto_delete(XName, Bindings, Deletions) ->
-    case rabbit_exchange:lookup(XName) of
-        {error, not_found} ->
+    case mnesia:read(rabbit_exchange, XName) of
+        [] ->
             add_deletion(XName, {undefined, not_deleted, Bindings}, Deletions);
-        {ok, X} ->
+        [X] ->
             add_deletion(XName, {X, not_deleted, Bindings},
                          case rabbit_exchange:maybe_auto_delete(X) of
                              not_deleted           -> Deletions;
@@ -423,17 +404,19 @@ merge_entry({X1, Deleted1, Bindings1}, {X2, Deleted2, Bindings2}) ->
      anything_but(not_deleted, Deleted1, Deleted2),
      [Bindings1 | Bindings2]}.
 
-process_deletions(Deletions) ->
+process_deletions(Deletions, Tx) ->
     dict:fold(
-      fun (_XName, {X = #exchange{ type = Type }, Deleted, Bindings}, ok) ->
+      fun (_XName, {X, Deleted, Bindings}, ok) ->
               FlatBindings = lists:flatten(Bindings),
-              [rabbit_event:notify(binding_deleted, info(B)) ||
+              [rabbit_event:notify_if(not Tx, binding_deleted, info(B)) ||
                   B <- FlatBindings],
-              TypeModule = type_to_module(Type),
               case Deleted of
-                  not_deleted -> TypeModule:remove_bindings(X, FlatBindings);
-                  deleted     -> rabbit_event:notify(exchange_deleted,
-                                                     [{name, X#exchange.name}]),
-                                 TypeModule:delete(X, FlatBindings)
+                  not_deleted ->
+                      rabbit_exchange:callback(X, remove_bindings,
+                                               [Tx, X, FlatBindings]);
+                  deleted ->
+                      rabbit_event:notify_if(not Tx, exchange_deleted,
+                                             [{name, X#exchange.name}]),
+                      rabbit_exchange:callback(X, delete, [Tx, X, FlatBindings])
               end
       end, ok, Deletions).
diff --git a/src/rabbit_channel.erl b/src/rabbit_channel.erl
index 6bed63a3..91559ea6 100644
--- a/src/rabbit_channel.erl
+++ b/src/rabbit_channel.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_channel).
@@ -35,10 +20,10 @@
 
 -behaviour(gen_server2).
 
--export([start_link/7, do/2, do/3, shutdown/1]).
--export([send_command/2, deliver/4, flushed/2]).
+-export([start_link/7, do/2, do/3, flush/1, shutdown/1]).
+-export([send_command/2, deliver/4, flushed/2, confirm/2]).
 -export([list/0, info_keys/0, info/1, info/2, info_all/0, info_all/1]).
--export([emit_stats/1, flush/1]).
+-export([emit_stats/1]).
 
 -export([init/1, terminate/2, code_change/3, handle_call/3, handle_cast/2,
          handle_info/2, handle_pre_hibernate/1, prioritise_call/3,
@@ -47,16 +32,19 @@
 -record(ch, {state, channel, reader_pid, writer_pid, limiter_pid,
              start_limiter_fun, transaction_id, tx_participants, next_tag,
              uncommitted_ack_q, unacked_message_q,
-             username, virtual_host, most_recently_declared_queue,
-             consumer_mapping, blocking, queue_collector_pid, stats_timer}).
+             user, virtual_host, most_recently_declared_queue,
+             consumer_mapping, blocking, queue_collector_pid, stats_timer,
+             confirm_enabled, publish_seqno, unconfirmed, confirmed}).
 
 -define(MAX_PERMISSION_CACHE_SIZE, 12).
 
 -define(STATISTICS_KEYS,
         [pid,
          transactional,
+         confirm,
          consumer_count,
          messages_unacknowledged,
+         messages_unconfirmed,
          acks_uncommitted,
          prefetch_count,
          client_flow_blocked]).
@@ -79,19 +67,21 @@
 -type(channel_number() :: non_neg_integer()).
 
 -spec(start_link/7 ::
-      (channel_number(), pid(), pid(), rabbit_access_control:username(),
+      (channel_number(), pid(), pid(), rabbit_types:user(),
        rabbit_types:vhost(), pid(),
        fun ((non_neg_integer()) -> rabbit_types:ok(pid()))) ->
                            rabbit_types:ok_pid_or_error()).
 -spec(do/2 :: (pid(), rabbit_framing:amqp_method_record()) -> 'ok').
 -spec(do/3 :: (pid(), rabbit_framing:amqp_method_record(),
                rabbit_types:maybe(rabbit_types:content())) -> 'ok').
+-spec(flush/1 :: (pid()) -> 'ok').
 -spec(shutdown/1 :: (pid()) -> 'ok').
 -spec(send_command/2 :: (pid(), rabbit_framing:amqp_method_record()) -> 'ok').
 -spec(deliver/4 ::
         (pid(), rabbit_types:ctag(), boolean(), rabbit_amqqueue:qmsg())
         -> 'ok').
 -spec(flushed/2 :: (pid(), pid()) -> 'ok').
+-spec(confirm/2 ::(pid(), [non_neg_integer()]) -> 'ok').
 -spec(list/0 :: () -> [pid()]).
 -spec(info_keys/0 :: () -> rabbit_types:info_keys()).
 -spec(info/1 :: (pid()) -> rabbit_types:infos()).
@@ -104,9 +94,9 @@
 
 %%----------------------------------------------------------------------------
 
-start_link(Channel, ReaderPid, WriterPid, Username, VHost, CollectorPid,
+start_link(Channel, ReaderPid, WriterPid, User, VHost, CollectorPid,
            StartLimiterFun) ->
-    gen_server2:start_link(?MODULE, [Channel, ReaderPid, WriterPid, Username,
+    gen_server2:start_link(?MODULE, [Channel, ReaderPid, WriterPid, User,
                                      VHost, CollectorPid, StartLimiterFun], []).
 
 do(Pid, Method) ->
@@ -115,6 +105,9 @@ do(Pid, Method) ->
 do(Pid, Method, Content) ->
     gen_server2:cast(Pid, {method, Method, Content}).
 
+flush(Pid) ->
+    gen_server2:call(Pid, flush).
+
 shutdown(Pid) ->
     gen_server2:cast(Pid, terminate).
 
@@ -127,6 +120,9 @@ deliver(Pid, ConsumerTag, AckRequired, Msg) ->
 flushed(Pid, QPid) ->
     gen_server2:cast(Pid, {flushed, QPid}).
 
+confirm(Pid, MsgSeqNos) ->
+    gen_server2:cast(Pid, {confirm, MsgSeqNos, self()}).
+
 list() ->
     pg_local:get_members(rabbit_channels).
 
@@ -150,12 +146,9 @@ info_all(Items) ->
 emit_stats(Pid) ->
     gen_server2:cast(Pid, emit_stats).
 
-flush(Pid) ->
-    gen_server2:call(Pid, flush).
-
 %%---------------------------------------------------------------------------
 
-init([Channel, ReaderPid, WriterPid, Username, VHost, CollectorPid,
+init([Channel, ReaderPid, WriterPid, User, VHost, CollectorPid,
       StartLimiterFun]) ->
     process_flag(trap_exit, true),
     ok = pg_local:join(rabbit_channels, self()),
@@ -171,13 +164,17 @@ init([Channel, ReaderPid, WriterPid, Username, VHost, CollectorPid,
                 next_tag                = 1,
                 uncommitted_ack_q       = queue:new(),
                 unacked_message_q       = queue:new(),
-                username                = Username,
+                user                    = User,
                 virtual_host            = VHost,
                 most_recently_declared_queue = <<>>,
                 consumer_mapping        = dict:new(),
                 blocking                = dict:new(),
                 queue_collector_pid     = CollectorPid,
-                stats_timer             = StatsTimer},
+                stats_timer             = StatsTimer,
+                confirm_enabled         = false,
+                publish_seqno           = 1,
+                unconfirmed             = gb_trees:empty(),
+                confirmed               = []},
     rabbit_event:notify(channel_created, infos(?CREATION_EVENT_KEYS, State)),
     rabbit_event:if_enabled(StatsTimer,
                             fun() -> internal_emit_stats(State) end),
@@ -193,10 +190,14 @@ prioritise_call(Msg, _From, _State) ->
 
 prioritise_cast(Msg, _State) ->
     case Msg of
-        emit_stats -> 7;
-        _          -> 0
+        emit_stats                   -> 7;
+        {confirm, _MsgSeqNos, _QPid} -> 5;
+        _                            -> 0
     end.
 
+handle_call(flush, _From, State) ->
+    reply(ok, State);
+
 handle_call(info, _From, State) ->
     reply(infos(?INFO_KEYS, State), State);
 
@@ -206,9 +207,6 @@ handle_call({info, Items}, _From, State) ->
     catch Error -> reply({error, Error}, State)
     end;
 
-handle_call(flush, _From, State) ->
-    reply(ok, State);
-
 handle_call(_Request, _From, State) ->
     noreply(State).
 
@@ -242,14 +240,24 @@ handle_cast({command, Msg}, State = #ch{writer_pid = WriterPid}) ->
     ok = rabbit_writer:send_command(WriterPid, Msg),
     noreply(State);
 
-handle_cast({deliver, ConsumerTag, AckRequired, Msg},
+handle_cast({deliver, ConsumerTag, AckRequired,
+             Msg = {_QName, QPid, _MsgId, Redelivered,
+                    #basic_message{exchange_name = ExchangeName,
+                                   routing_key = RoutingKey,
+                                   content = Content}}},
             State = #ch{writer_pid = WriterPid,
                         next_tag = DeliveryTag}) ->
     State1 = lock_message(AckRequired,
                           ack_record(DeliveryTag, ConsumerTag, Msg),
                           State),
-    ok = internal_deliver(WriterPid, true, ConsumerTag, DeliveryTag, Msg),
-    {_QName, QPid, _MsgId, _Redelivered, _Msg} = Msg,
+
+    M = #'basic.deliver'{consumer_tag = ConsumerTag,
+                         delivery_tag = DeliveryTag,
+                         redelivered = Redelivered,
+                         exchange = ExchangeName#resource.name,
+                         routing_key = RoutingKey},
+    rabbit_writer:send_command_and_notify(WriterPid, QPid, self(), M, Content),
+
     maybe_incr_stats([{QPid, 1}],
                      case AckRequired of
                          true  -> deliver;
@@ -259,13 +267,27 @@ handle_cast({deliver, ConsumerTag, AckRequired, Msg},
 
 handle_cast(emit_stats, State = #ch{stats_timer = StatsTimer}) ->
     internal_emit_stats(State),
-    {noreply,
-     State#ch{stats_timer = rabbit_event:reset_stats_timer(StatsTimer)},
-     hibernate}.
+    noreply([ensure_stats_timer],
+            State#ch{stats_timer = rabbit_event:reset_stats_timer(StatsTimer)});
+
+handle_cast({confirm, MsgSeqNos, From}, State) ->
+    State1 = #ch{confirmed = C} = confirm(MsgSeqNos, From, State),
+    noreply([send_confirms], State1, case C of [] -> hibernate; _ -> 0 end).
+
+handle_info(timeout, State) ->
+    noreply(State);
 
-handle_info({'DOWN', _MRef, process, QPid, _Reason}, State) ->
+handle_info({'DOWN', _MRef, process, QPid, _Reason},
+            State = #ch{unconfirmed = UC}) ->
+    %% TODO: this does a complete scan and partial rebuild of the
+    %% tree, which is quite efficient. To do better we'd need to
+    %% maintain a secondary mapping, from QPids to MsgSeqNos.
+    {MXs, UC1} = remove_queue_unconfirmed(
+                   gb_trees:next(gb_trees:iterator(UC)), QPid,
+                   {[], UC}, State),
     erase_queue_stats(QPid),
-    {noreply, queue_blocked(QPid, State), hibernate}.
+    noreply(
+      queue_blocked(QPid, record_confirms(MXs, State#ch{unconfirmed = UC1}))).
 
 handle_pre_hibernate(State = #ch{stats_timer = StatsTimer}) ->
     ok = clear_permission_cache(),
@@ -274,8 +296,8 @@ handle_pre_hibernate(State = #ch{stats_timer = StatsTimer}) ->
                                     internal_emit_stats(
                                       State, [{idle_since, now()}])
                             end),
-    {hibernate,
-     State#ch{stats_timer = rabbit_event:stop_stats_timer(StatsTimer)}}.
+    StatsTimer1 = rabbit_event:stop_stats_timer(StatsTimer),
+    {hibernate, State#ch{stats_timer = StatsTimer1}}.
 
 terminate(_Reason, State = #ch{state = terminating}) ->
     terminate(State);
@@ -295,11 +317,24 @@ code_change(_OldVsn, State, _Extra) ->
 
 %%---------------------------------------------------------------------------
 
-reply(Reply, NewState) ->
-    {reply, Reply, ensure_stats_timer(NewState), hibernate}.
+reply(Reply, NewState) -> reply(Reply, [], NewState).
+
+reply(Reply, Mask, NewState) -> reply(Reply, Mask, NewState, hibernate).
+
+reply(Reply, Mask, NewState, Timeout) ->
+    {reply, Reply, next_state(Mask, NewState), Timeout}.
+
+noreply(NewState) -> noreply([], NewState).
+
+noreply(Mask, NewState) -> noreply(Mask, NewState, hibernate).
 
-noreply(NewState) ->
-    {noreply, ensure_stats_timer(NewState), hibernate}.
+noreply(Mask, NewState, Timeout) ->
+    {noreply, next_state(Mask, NewState), Timeout}.
+
+next_state(Mask, State) ->
+    lists:foldl(fun (ensure_stats_timer, State1) -> ensure_stats_timer(State1);
+                    (send_confirms,      State1) -> send_confirms(State1)
+                end, State, [ensure_stats_timer, send_confirms] -- Mask).
 
 ensure_stats_timer(State = #ch{stats_timer = StatsTimer}) ->
     ChPid = self(),
@@ -325,7 +360,7 @@ return_queue_declare_ok(#resource{name = ActualName},
                                   message_count  = MessageCount,
                                   consumer_count = ConsumerCount}).
 
-check_resource_access(Username, Resource, Perm) ->
+check_resource_access(User, Resource, Perm) ->
     V = {Resource, Perm},
     Cache = case get(permission_cache) of
                 undefined -> [];
@@ -335,7 +370,7 @@ check_resource_access(Username, Resource, Perm) ->
         case lists:member(V, Cache) of
             true  -> lists:delete(V, Cache);
             false -> ok = rabbit_access_control:check_resource_access(
-                            Username, Resource, Perm),
+                            User, Resource, Perm),
                      lists:sublist(Cache, ?MAX_PERMISSION_CACHE_SIZE - 1)
         end,
     put(permission_cache, [V | CacheTail]),
@@ -345,14 +380,32 @@ clear_permission_cache() ->
     erase(permission_cache),
     ok.
 
-check_configure_permitted(Resource, #ch{username = Username}) ->
-    check_resource_access(Username, Resource, configure).
+check_configure_permitted(Resource, #ch{user = User}) ->
+    check_resource_access(User, Resource, configure).
+
+check_write_permitted(Resource, #ch{user = User}) ->
+    check_resource_access(User, Resource, write).
 
-check_write_permitted(Resource, #ch{username = Username}) ->
-    check_resource_access(Username, Resource, write).
+check_read_permitted(Resource, #ch{user = User}) ->
+    check_resource_access(User, Resource, read).
 
-check_read_permitted(Resource, #ch{username = Username}) ->
-    check_resource_access(Username, Resource, read).
+check_user_id_header(#'P_basic'{user_id = undefined}, _) ->
+    ok;
+check_user_id_header(#'P_basic'{user_id = Username},
+                     #ch{user = #user{username = Username}}) ->
+    ok;
+check_user_id_header(#'P_basic'{user_id = Claimed},
+                     #ch{user = #user{username = Actual}}) ->
+    rabbit_misc:protocol_error(
+      precondition_failed, "user_id property set to '~s' but "
+      "authenticated user was '~s'", [Claimed, Actual]).
+
+check_internal_exchange(#exchange{name = Name, internal = true}) ->
+    rabbit_misc:protocol_error(access_refused,
+                               "cannot publish to internal ~s",
+                               [rabbit_misc:rs(Name)]);
+check_internal_exchange(_) ->
+    ok.
 
 expand_queue_name_shortcut(<<>>, #ch{most_recently_declared_queue = <<>>}) ->
     rabbit_misc:protocol_error(
@@ -420,6 +473,44 @@ queue_blocked(QPid, State = #ch{blocking = Blocking}) ->
                       State#ch{blocking = Blocking1}
     end.
 
+remove_queue_unconfirmed(none, _QPid, Acc, _State) ->
+    Acc;
+remove_queue_unconfirmed({MsgSeqNo, XQ, Next}, QPid, Acc, State) ->
+    remove_queue_unconfirmed(gb_trees:next(Next), QPid,
+                             remove_qmsg(MsgSeqNo, QPid, XQ, Acc, State),
+                             State).
+
+record_confirm(undefined, _, State) ->
+    State;
+record_confirm(MsgSeqNo, XName, State) ->
+    record_confirms([{MsgSeqNo, XName}], State).
+
+record_confirms([], State) ->
+    State;
+record_confirms(MXs, State = #ch{confirmed = C}) ->
+    State#ch{confirmed = [MXs | C]}.
+
+confirm([], _QPid, State) ->
+    State;
+confirm(MsgSeqNos, QPid, State = #ch{unconfirmed = UC}) ->
+    {MXs, UC1} =
+        lists:foldl(
+          fun(MsgSeqNo, {_DMs, UC0} = Acc) ->
+                  case gb_trees:lookup(MsgSeqNo, UC0) of
+                      none        -> Acc;
+                      {value, XQ} -> remove_qmsg(MsgSeqNo, QPid, XQ, Acc, State)
+                  end
+          end, {[], UC}, MsgSeqNos),
+    record_confirms(MXs, State#ch{unconfirmed = UC1}).
+
+remove_qmsg(MsgSeqNo, QPid, {XName, Qs}, {MXs, UC}, State) ->
+    Qs1 = sets:del_element(QPid, Qs),
+    maybe_incr_stats([{{QPid, XName}, 1}], confirm, State),
+    case sets:size(Qs1) of
+        0 -> {[{MsgSeqNo, XName} | MXs], gb_trees:delete(MsgSeqNo, UC)};
+        _ -> {MXs, gb_trees:update(MsgSeqNo, {XName, Qs1}, UC)}
+    end.
+
 handle_method(#'channel.open'{}, _, State = #ch{state = starting}) ->
     {reply, #'channel.open_ok'{}, State#ch{state = running}};
 
@@ -442,16 +533,24 @@ handle_method(#'basic.publish'{exchange    = ExchangeNameBin,
                                routing_key = RoutingKey,
                                mandatory   = Mandatory,
                                immediate   = Immediate},
-              Content, State = #ch{virtual_host   = VHostPath,
-                                   transaction_id = TxnKey,
-                                   writer_pid     = WriterPid}) ->
+              Content, State = #ch{virtual_host    = VHostPath,
+                                   transaction_id  = TxnKey,
+                                   confirm_enabled = ConfirmEnabled}) ->
     ExchangeName = rabbit_misc:r(VHostPath, exchange, ExchangeNameBin),
     check_write_permitted(ExchangeName, State),
     Exchange = rabbit_exchange:lookup_or_die(ExchangeName),
+    check_internal_exchange(Exchange),
     %% We decode the content's properties here because we're almost
     %% certain to want to look at delivery-mode and priority.
     DecodedContent = rabbit_binary_parser:ensure_content_decoded(Content),
+    check_user_id_header(DecodedContent#content.properties, State),
     IsPersistent = is_message_persistent(DecodedContent),
+    {MsgSeqNo, State1} =
+        case ConfirmEnabled of
+            false -> {undefined, State};
+            true  -> SeqNo = State#ch.publish_seqno,
+                     {SeqNo, State#ch{publish_seqno = SeqNo + 1}}
+        end,
     Message = #basic_message{exchange_name = ExchangeName,
                              routing_key   = RoutingKey,
                              content       = DecodedContent,
@@ -460,20 +559,24 @@ handle_method(#'basic.publish'{exchange    = ExchangeNameBin,
     {RoutingRes, DeliveredQPids} =
         rabbit_exchange:publish(
           Exchange,
-          rabbit_basic:delivery(Mandatory, Immediate, TxnKey, Message)),
-    case RoutingRes of
-        routed        -> ok;
-        unroutable    -> ok = basic_return(Message, WriterPid, no_route);
-        not_delivered -> ok = basic_return(Message, WriterPid, no_consumers)
-    end,
+          rabbit_basic:delivery(Mandatory, Immediate, TxnKey, Message,
+                                MsgSeqNo)),
+    State2 = process_routing_result(RoutingRes, DeliveredQPids, ExchangeName,
+                                    MsgSeqNo, Message, State1),
     maybe_incr_stats([{ExchangeName, 1} |
                       [{{QPid, ExchangeName}, 1} ||
-                          QPid <- DeliveredQPids]], publish, State),
+                          QPid <- DeliveredQPids]], publish, State2),
     {noreply, case TxnKey of
-                  none -> State;
-                  _    -> add_tx_participants(DeliveredQPids, State)
+                  none -> State2;
+                  _    -> add_tx_participants(DeliveredQPids, State2)
               end};
 
+handle_method(#'basic.nack'{delivery_tag = DeliveryTag,
+                            multiple     = Multiple,
+                            requeue      = Requeue},
+              _, State) ->
+    reject(DeliveryTag, Requeue, Multiple, State);
+
 handle_method(#'basic.ack'{delivery_tag = DeliveryTag,
                            multiple = Multiple},
               _, State = #ch{transaction_id = TxnKey,
@@ -659,21 +762,15 @@ handle_method(#'basic.recover'{requeue = Requeue}, Content, State) ->
 
 handle_method(#'basic.reject'{delivery_tag = DeliveryTag,
                               requeue = Requeue},
-              _, State = #ch{unacked_message_q = UAMQ}) ->
-    {Acked, Remaining} = collect_acks(UAMQ, DeliveryTag, false),
-    ok = fold_per_queue(
-           fun (QPid, MsgIds, ok) ->
-                   rabbit_amqqueue:reject(QPid, MsgIds, Requeue, self())
-           end, ok, Acked),
-    ok = notify_limiter(State#ch.limiter_pid, Acked),
-    {noreply, State#ch{unacked_message_q = Remaining}};
+              _, State) ->
+    reject(DeliveryTag, Requeue, false, State);
 
 handle_method(#'exchange.declare'{exchange = ExchangeNameBin,
                                   type = TypeNameBin,
                                   passive = false,
                                   durable = Durable,
                                   auto_delete = AutoDelete,
-                                  internal = false,
+                                  internal = Internal,
                                   nowait = NoWait,
                                   arguments = Args},
               _, State = #ch{virtual_host = VHostPath}) ->
@@ -696,10 +793,11 @@ handle_method(#'exchange.declare'{exchange = ExchangeNameBin,
                                         CheckedType,
                                         Durable,
                                         AutoDelete,
+                                        Internal,
                                         Args)
         end,
     ok = rabbit_exchange:assert_equivalence(X, CheckedType, Durable,
-                                            AutoDelete, Args),
+                                            AutoDelete, Internal, Args),
     return_ok(State, NoWait, #'exchange.declare_ok'{});
 
 handle_method(#'exchange.declare'{exchange = ExchangeNameBin,
@@ -860,6 +958,11 @@ handle_method(#'queue.purge'{queue = QueueNameBin,
     return_ok(State, NoWait,
               #'queue.purge_ok'{message_count = PurgedMessageCount});
 
+
+handle_method(#'tx.select'{}, _, #ch{confirm_enabled = true}) ->
+    rabbit_misc:protocol_error(
+      precondition_failed, "cannot switch from confirm to tx mode", []);
+
 handle_method(#'tx.select'{}, _, State = #ch{transaction_id = none}) ->
     {reply, #'tx.select_ok'{}, new_tx(State)};
 
@@ -880,6 +983,15 @@ handle_method(#'tx.rollback'{}, _, #ch{transaction_id = none}) ->
 handle_method(#'tx.rollback'{}, _, State) ->
     {reply, #'tx.rollback_ok'{}, internal_rollback(State)};
 
+handle_method(#'confirm.select'{}, _, #ch{transaction_id = TxId})
+  when TxId =/= none ->
+    rabbit_misc:protocol_error(
+      precondition_failed, "cannot switch from tx to confirm mode", []);
+
+handle_method(#'confirm.select'{nowait = NoWait}, _, State) ->
+    return_ok(State#ch{confirm_enabled = true},
+              NoWait, #'confirm.select_ok'{});
+
 handle_method(#'channel.flow'{active = true}, _,
               State = #ch{limiter_pid = LimiterPid}) ->
     LimiterPid1 = case rabbit_limiter:unblock(LimiterPid) of
@@ -969,6 +1081,15 @@ basic_return(#basic_message{exchange_name = ExchangeName,
                            routing_key = RoutingKey},
            Content).
 
+reject(DeliveryTag, Requeue, Multiple, State = #ch{unacked_message_q = UAMQ}) ->
+    {Acked, Remaining} = collect_acks(UAMQ, DeliveryTag, Multiple),
+    ok = fold_per_queue(
+           fun (QPid, MsgIds, ok) ->
+                   rabbit_amqqueue:reject(QPid, MsgIds, Requeue, self())
+           end, ok, Acked),
+    ok = notify_limiter(State#ch.limiter_pid, Acked),
+    {noreply, State#ch{unacked_message_q = Remaining}}.
+
 ack_record(DeliveryTag, ConsumerTag,
            _MsgStruct = {_QName, QPid, MsgId, _Redelivered, _Msg}) ->
     {DeliveryTag, ConsumerTag, {QPid, MsgId}}.
@@ -1107,26 +1228,57 @@ is_message_persistent(Content) ->
             IsPersistent
     end.
 
+process_routing_result(unroutable,    _, XName,  MsgSeqNo, Msg, State) ->
+    ok = basic_return(Msg, State#ch.writer_pid, no_route),
+    record_confirm(MsgSeqNo, XName, State);
+process_routing_result(not_delivered, _, XName,  MsgSeqNo, Msg, State) ->
+    ok = basic_return(Msg, State#ch.writer_pid, no_consumers),
+    record_confirm(MsgSeqNo, XName, State);
+process_routing_result(routed,       [], XName,  MsgSeqNo,   _, State) ->
+    record_confirm(MsgSeqNo, XName, State);
+process_routing_result(routed,        _,     _, undefined,   _, State) ->
+    State;
+process_routing_result(routed,    QPids, XName,  MsgSeqNo,   _, State) ->
+    #ch{unconfirmed = UC} = State,
+    [maybe_monitor(QPid) || QPid <- QPids],
+    UC1 = gb_trees:insert(MsgSeqNo, {XName, sets:from_list(QPids)}, UC),
+    State#ch{unconfirmed = UC1}.
+
 lock_message(true, MsgStruct, State = #ch{unacked_message_q = UAMQ}) ->
     State#ch{unacked_message_q = queue:in(MsgStruct, UAMQ)};
 lock_message(false, _MsgStruct, State) ->
     State.
 
-internal_deliver(WriterPid, Notify, ConsumerTag, DeliveryTag,
-                 {_QName, QPid, _MsgId, Redelivered,
-                  #basic_message{exchange_name = ExchangeName,
-                                 routing_key = RoutingKey,
-                                 content = Content}}) ->
-    M = #'basic.deliver'{consumer_tag = ConsumerTag,
-                         delivery_tag = DeliveryTag,
-                         redelivered = Redelivered,
-                         exchange = ExchangeName#resource.name,
-                         routing_key = RoutingKey},
-    ok = case Notify of
-             true  -> rabbit_writer:send_command_and_notify(
-                        WriterPid, QPid, self(), M, Content);
-             false -> rabbit_writer:send_command(WriterPid, M, Content)
-         end.
+send_confirms(State = #ch{confirmed = C}) ->
+    C1 = lists:append(C),
+    MsgSeqNos = [ begin maybe_incr_stats([{ExchangeName, 1}], confirm, State),
+                        MsgSeqNo
+                  end || {MsgSeqNo, ExchangeName} <- C1 ],
+    send_confirms(MsgSeqNos, State #ch{confirmed = []}).
+send_confirms([], State) ->
+    State;
+send_confirms([MsgSeqNo], State = #ch{writer_pid = WriterPid}) ->
+    send_confirm(MsgSeqNo, WriterPid),
+    State;
+send_confirms(Cs, State = #ch{writer_pid  = WriterPid, unconfirmed = UC}) ->
+    SCs = lists:usort(Cs),
+    CutOff = case gb_trees:is_empty(UC) of
+                 true  -> lists:last(SCs) + 1;
+                 false -> {SeqNo, _XQ} = gb_trees:smallest(UC), SeqNo
+             end,
+    {Ms, Ss} = lists:splitwith(fun(X) -> X < CutOff end, SCs),
+    case Ms of
+        [] -> ok;
+        _  -> ok = rabbit_writer:send_command(
+                     WriterPid, #'basic.ack'{delivery_tag = lists:last(Ms),
+                                             multiple = true})
+    end,
+    [ok = send_confirm(SeqNo, WriterPid) || SeqNo <- Ss],
+    State.
+
+send_confirm(SeqNo, WriterPid) ->
+    ok = rabbit_writer:send_command(WriterPid,
+                                    #'basic.ack'{delivery_tag = SeqNo}).
 
 terminate(_State) ->
     pg_local:leave(rabbit_channels, self()),
@@ -1137,11 +1289,14 @@ infos(Items, State) -> [{Item, i(Item, State)} || Item <- Items].
 i(pid,            _)                                 -> self();
 i(connection,     #ch{reader_pid       = ReaderPid}) -> ReaderPid;
 i(number,         #ch{channel          = Channel})   -> Channel;
-i(user,           #ch{username         = Username})  -> Username;
+i(user,           #ch{user             = User})      -> User#user.username;
 i(vhost,          #ch{virtual_host     = VHost})     -> VHost;
 i(transactional,  #ch{transaction_id   = TxnKey})    -> TxnKey =/= none;
+i(confirm,        #ch{confirm_enabled  = CE})        -> CE;
 i(consumer_count, #ch{consumer_mapping = ConsumerMapping}) ->
     dict:size(ConsumerMapping);
+i(messages_unconfirmed, #ch{unconfirmed = UC}) ->
+    gb_trees:size(UC);
 i(messages_unacknowledged, #ch{unacked_message_q = UAMQ,
                                uncommitted_ack_q = UAQ}) ->
     queue:len(UAMQ) + queue:len(UAQ);
diff --git a/src/rabbit_channel_sup.erl b/src/rabbit_channel_sup.erl
index 02199a65..d426d55d 100644
--- a/src/rabbit_channel_sup.erl
+++ b/src/rabbit_channel_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_channel_sup).
@@ -48,15 +33,15 @@
 -type(start_link_args() ::
         {rabbit_types:protocol(), rabbit_net:socket(),
          rabbit_channel:channel_number(), non_neg_integer(), pid(),
-         rabbit_access_control:username(), rabbit_types:vhost(), pid()}).
+         rabbit_types:user(), rabbit_types:vhost(), pid()}).
 
--spec(start_link/1 :: (start_link_args()) -> {'ok', pid(), pid()}).
+-spec(start_link/1 :: (start_link_args()) -> {'ok', pid(), {pid(), any()}}).
 
 -endif.
 
 %%----------------------------------------------------------------------------
 
-start_link({Protocol, Sock, Channel, FrameMax, ReaderPid, Username, VHost,
+start_link({Protocol, Sock, Channel, FrameMax, ReaderPid, User, VHost,
             Collector}) ->
     {ok, SupPid} = supervisor2:start_link(?MODULE, []),
     {ok, WriterPid} =
@@ -69,16 +54,11 @@ start_link({Protocol, Sock, Channel, FrameMax, ReaderPid, Username, VHost,
         supervisor2:start_child(
           SupPid,
           {channel, {rabbit_channel, start_link,
-                     [Channel, ReaderPid, WriterPid, Username, VHost,
+                     [Channel, ReaderPid, WriterPid, User, VHost,
                       Collector, start_limiter_fun(SupPid)]},
            intrinsic, ?MAX_WAIT, worker, [rabbit_channel]}),
-    {ok, FramingChannelPid} =
-        supervisor2:start_child(
-          SupPid,
-          {framing_channel, {rabbit_framing_channel, start_link,
-                             [ReaderPid, ChannelPid, Protocol]},
-           intrinsic, ?MAX_WAIT, worker, [rabbit_framing_channel]}),
-    {ok, SupPid, FramingChannelPid}.
+    {ok, AState} = rabbit_command_assembler:init(Protocol),
+    {ok, SupPid, {ChannelPid, AState}}.
 
 %%----------------------------------------------------------------------------
 
diff --git a/src/rabbit_channel_sup_sup.erl b/src/rabbit_channel_sup_sup.erl
index 21c39780..e2561c80 100644
--- a/src/rabbit_channel_sup_sup.erl
+++ b/src/rabbit_channel_sup_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_channel_sup_sup).
@@ -43,7 +28,7 @@
 
 -spec(start_link/0 :: () -> rabbit_types:ok_pid_or_error()).
 -spec(start_channel/2 :: (pid(), rabbit_channel_sup:start_link_args()) ->
-                              {'ok', pid(), pid()}).
+                              {'ok', pid(), {pid(), any()}}).
 
 -endif.
 
diff --git a/src/rabbit_command_assembler.erl b/src/rabbit_command_assembler.erl
new file mode 100644
index 00000000..07036ce8
--- /dev/null
+++ b/src/rabbit_command_assembler.erl
@@ -0,0 +1,133 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_command_assembler).
+-include("rabbit_framing.hrl").
+-include("rabbit.hrl").
+
+-export([analyze_frame/3, init/1, process/2]).
+
+%%----------------------------------------------------------------------------
+
+-ifdef(use_specs).
+
+-type(frame_type() :: ?FRAME_METHOD | ?FRAME_HEADER | ?FRAME_BODY |
+                      ?FRAME_OOB_METHOD | ?FRAME_OOB_HEADER | ?FRAME_OOB_BODY |
+                      ?FRAME_TRACE | ?FRAME_HEARTBEAT).
+-type(protocol()   :: rabbit_framing:protocol()).
+-type(method()     :: rabbit_framing:amqp_method_record()).
+-type(class_id()   :: rabbit_framing:amqp_class_id()).
+-type(weight()     :: non_neg_integer()).
+-type(body_size()  :: non_neg_integer()).
+-type(content()    :: rabbit_types:undecoded_content()).
+
+-type(frame() ::
+        {'method',         rabbit_framing:amqp_method_name(), binary()} |
+        {'content_header', class_id(), weight(), body_size(), binary()} |
+        {'content_body',   binary()}).
+
+-type(state() ::
+        {'method',         protocol()} |
+        {'content_header', method(), class_id(), protocol()} |
+        {'content_body',   method(), body_size(), class_id(), protocol()}).
+
+-spec(analyze_frame/3 :: (frame_type(), binary(), protocol()) ->
+                              frame() | 'heartbeat' | 'error').
+
+-spec(init/1 :: (protocol()) -> {ok, state()}).
+-spec(process/2 :: (frame(), state()) ->
+                        {ok, state()} |
+                        {ok, method(), state()} |
+                        {ok, method(), content(), state()} |
+                        {error, rabbit_types:amqp_error()}).
+
+-endif.
+
+%%--------------------------------------------------------------------
+
+analyze_frame(?FRAME_METHOD,
+              <<ClassId:16, MethodId:16, MethodFields/binary>>,
+              Protocol) ->
+    MethodName = Protocol:lookup_method_name({ClassId, MethodId}),
+    {method, MethodName, MethodFields};
+analyze_frame(?FRAME_HEADER,
+              <<ClassId:16, Weight:16, BodySize:64, Properties/binary>>,
+              _Protocol) ->
+    {content_header, ClassId, Weight, BodySize, Properties};
+analyze_frame(?FRAME_BODY, Body, _Protocol) ->
+    {content_body, Body};
+analyze_frame(?FRAME_HEARTBEAT, <<>>, _Protocol) ->
+    heartbeat;
+analyze_frame(_Type, _Body, _Protocol) ->
+    error.
+
+init(Protocol) -> {ok, {method, Protocol}}.
+
+process({method, MethodName, FieldsBin}, {method, Protocol}) ->
+    try
+        Method = Protocol:decode_method_fields(MethodName, FieldsBin),
+        case Protocol:method_has_content(MethodName) of
+            true  -> {ClassId, _MethodId} = Protocol:method_id(MethodName),
+                     {ok, {content_header, Method, ClassId, Protocol}};
+            false -> {ok, Method, {method, Protocol}}
+        end
+    catch exit:#amqp_error{} = Reason -> {error, Reason}
+    end;
+process(_Frame, {method, _Protocol}) ->
+    unexpected_frame("expected method frame, "
+                     "got non method frame instead", [], none);
+process({content_header, ClassId, 0, 0, PropertiesBin},
+        {content_header, Method, ClassId, Protocol}) ->
+    Content = empty_content(ClassId, PropertiesBin, Protocol),
+    {ok, Method, Content, {method, Protocol}};
+process({content_header, ClassId, 0, BodySize, PropertiesBin},
+        {content_header, Method, ClassId, Protocol}) ->
+    Content = empty_content(ClassId, PropertiesBin, Protocol),
+    {ok, {content_body, Method, BodySize, Content, Protocol}};
+process({content_header, HeaderClassId, 0, _BodySize, _PropertiesBin},
+        {content_header, Method, ClassId, _Protocol}) ->
+    unexpected_frame("expected content header for class ~w, "
+                     "got one for class ~w instead",
+                     [ClassId, HeaderClassId], Method);
+process(_Frame, {content_header, Method, ClassId, _Protocol}) ->
+    unexpected_frame("expected content header for class ~w, "
+                     "got non content header frame instead", [ClassId], Method);
+process({content_body, FragmentBin},
+        {content_body, Method, RemainingSize,
+         Content = #content{payload_fragments_rev = Fragments}, Protocol}) ->
+    NewContent = Content#content{
+                   payload_fragments_rev = [FragmentBin | Fragments]},
+    case RemainingSize - size(FragmentBin) of
+        0  -> {ok, Method, NewContent, {method, Protocol}};
+        Sz -> {ok, {content_body, Method, Sz, NewContent, Protocol}}
+    end;
+process(_Frame, {content_body, Method, _RemainingSize, _Content, _Protocol}) ->
+    unexpected_frame("expected content body, "
+                     "got non content body frame instead", [], Method).
+
+%%--------------------------------------------------------------------
+
+empty_content(ClassId, PropertiesBin, Protocol) ->
+    #content{class_id              = ClassId,
+             properties            = none,
+             properties_bin        = PropertiesBin,
+             protocol              = Protocol,
+             payload_fragments_rev = []}.
+
+unexpected_frame(Format, Params, Method) when is_atom(Method) ->
+    {error, rabbit_misc:amqp_error(unexpected_frame, Format, Params, Method)};
+unexpected_frame(Format, Params, Method) ->
+    unexpected_frame(Format, Params, rabbit_misc:method_record_type(Method)).
diff --git a/src/rabbit_connection_sup.erl b/src/rabbit_connection_sup.erl
index ff3995b5..b2aba2ee 100644
--- a/src/rabbit_connection_sup.erl
+++ b/src/rabbit_connection_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_connection_sup).
@@ -78,4 +63,3 @@ reader(Pid) ->
 
 init([]) ->
     {ok, {{one_for_all, 0, 1}, []}}.
-
diff --git a/src/rabbit_control.erl b/src/rabbit_control.erl
index f05aaedf..7e6df0b6 100644
--- a/src/rabbit_control.erl
+++ b/src/rabbit_control.erl
@@ -1,38 +1,23 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_control).
 -include("rabbit.hrl").
 
--export([start/0, stop/0, action/5]).
+-export([start/0, stop/0, action/5, diagnostics/1]).
 
 -define(RPC_TIMEOUT, infinity).
 
@@ -50,6 +35,7 @@
         (atom(), node(), [string()], [{string(), any()}],
          fun ((string(), [any()]) -> 'ok'))
         -> 'ok').
+-spec(diagnostics/1 :: (node()) -> [{string(), [any()]}]).
 -spec(usage/0 :: () -> no_return()).
 
 -endif.
@@ -116,24 +102,28 @@ fmt_stderr(Format, Args) -> rabbit_misc:format_stderr(Format ++ "~n", Args).
 print_error(Format, Args) -> fmt_stderr("Error: " ++ Format, Args).
 
 print_badrpc_diagnostics(Node) ->
-    fmt_stderr("diagnostics:", []),
+    [fmt_stderr(Fmt, Args) || {Fmt, Args} <- diagnostics(Node)].
+
+diagnostics(Node) ->
     {_NodeName, NodeHost} = rabbit_misc:nodeparts(Node),
-    case net_adm:names(NodeHost) of
-        {error, EpmdReason} ->
-            fmt_stderr("- unable to connect to epmd on ~s: ~w",
-                       [NodeHost, EpmdReason]);
-        {ok, NamePorts} ->
-            fmt_stderr("- nodes and their ports on ~s: ~p",
-                       [NodeHost, [{list_to_atom(Name), Port} ||
-                                      {Name, Port} <- NamePorts]])
-            end,
-    fmt_stderr("- current node: ~w", [node()]),
-    case init:get_argument(home) of
-        {ok, [[Home]]} -> fmt_stderr("- current node home dir: ~s", [Home]);
-        Other          -> fmt_stderr("- no current node home dir: ~p", [Other])
-    end,
-    fmt_stderr("- current node cookie hash: ~s", [rabbit_misc:cookie_hash()]),
-    ok.
+    [
+        {"diagnostics:", []},
+        case net_adm:names(NodeHost) of
+            {error, EpmdReason} ->
+                {"- unable to connect to epmd on ~s: ~w",
+                    [NodeHost, EpmdReason]};
+            {ok, NamePorts} ->
+                {"- nodes and their ports on ~s: ~p",
+                              [NodeHost, [{list_to_atom(Name), Port} ||
+                                          {Name, Port} <- NamePorts]]}
+        end,
+        {"- current node: ~w", [node()]},
+        case init:get_argument(home) of
+            {ok, [[Home]]} -> {"- current node home dir: ~s", [Home]};
+            Other          -> {"- no current node home dir: ~p", [Other]}
+        end,
+        {"- current node cookie hash: ~s", [rabbit_misc:cookie_hash()]}
+    ].
 
 stop() ->
     ok.
@@ -196,44 +186,48 @@ action(close_connection, Node, [PidStr, Explanation], _Opts, Inform) ->
 
 action(add_user, Node, Args = [Username, _Password], _Opts, Inform) ->
     Inform("Creating user ~p", [Username]),
-    call(Node, {rabbit_access_control, add_user, Args});
+    call(Node, {rabbit_auth_backend_internal, add_user, Args});
 
 action(delete_user, Node, Args = [_Username], _Opts, Inform) ->
     Inform("Deleting user ~p", Args),
-    call(Node, {rabbit_access_control, delete_user, Args});
+    call(Node, {rabbit_auth_backend_internal, delete_user, Args});
 
 action(change_password, Node, Args = [Username, _Newpassword], _Opts, Inform) ->
     Inform("Changing password for user ~p", [Username]),
-    call(Node, {rabbit_access_control, change_password, Args});
+    call(Node, {rabbit_auth_backend_internal, change_password, Args});
+
+action(clear_password, Node, Args = [Username], _Opts, Inform) ->
+    Inform("Clearing password for user ~p", [Username]),
+    call(Node, {rabbit_auth_backend_internal, clear_password, Args});
 
 action(set_admin, Node, [Username], _Opts, Inform) ->
     Inform("Setting administrative status for user ~p", [Username]),
-    call(Node, {rabbit_access_control, set_admin, [Username]});
+    call(Node, {rabbit_auth_backend_internal, set_admin, [Username]});
 
 action(clear_admin, Node, [Username], _Opts, Inform) ->
     Inform("Clearing administrative status for user ~p", [Username]),
-    call(Node, {rabbit_access_control, clear_admin, [Username]});
+    call(Node, {rabbit_auth_backend_internal, clear_admin, [Username]});
 
 action(list_users, Node, [], _Opts, Inform) ->
     Inform("Listing users", []),
-    display_list(call(Node, {rabbit_access_control, list_users, []}));
+    display_list(call(Node, {rabbit_auth_backend_internal, list_users, []}));
 
 action(add_vhost, Node, Args = [_VHostPath], _Opts, Inform) ->
     Inform("Creating vhost ~p", Args),
-    call(Node, {rabbit_access_control, add_vhost, Args});
+    call(Node, {rabbit_vhost, add, Args});
 
 action(delete_vhost, Node, Args = [_VHostPath], _Opts, Inform) ->
     Inform("Deleting vhost ~p", Args),
-    call(Node, {rabbit_access_control, delete_vhost, Args});
+    call(Node, {rabbit_vhost, delete, Args});
 
 action(list_vhosts, Node, [], _Opts, Inform) ->
     Inform("Listing vhosts", []),
-    display_list(call(Node, {rabbit_access_control, list_vhosts, []}));
+    display_list(call(Node, {rabbit_vhost, list, []}));
 
 action(list_user_permissions, Node, Args = [_Username], _Opts, Inform) ->
     Inform("Listing permissions for user ~p", Args),
-    display_list(call(Node, {rabbit_access_control, list_user_permissions,
-                             Args}));
+    display_list(call(Node, {rabbit_auth_backend_internal,
+                             list_user_permissions, Args}));
 
 action(list_queues, Node, Args, Opts, Inform) ->
     Inform("Listing queues", []),
@@ -279,27 +273,31 @@ action(list_consumers, Node, _Args, Opts, Inform) ->
     Inform("Listing consumers", []),
     VHostArg = list_to_binary(proplists:get_value(?VHOST_OPT, Opts)),
     InfoKeys = [queue_name, channel_pid, consumer_tag, ack_required],
-    display_info_list(
-      [lists:zip(InfoKeys, tuple_to_list(X)) ||
-          X <- rpc_call(Node, rabbit_amqqueue, consumers_all, [VHostArg])],
-      InfoKeys);
+    case rpc_call(Node, rabbit_amqqueue, consumers_all, [VHostArg]) of
+        L when is_list(L) -> display_info_list(
+                               [lists:zip(InfoKeys, tuple_to_list(X)) ||
+                                   X <- L],
+                               InfoKeys);
+        Other             -> Other
+    end;
 
 action(set_permissions, Node, [Username, CPerm, WPerm, RPerm], Opts, Inform) ->
     VHost = proplists:get_value(?VHOST_OPT, Opts),
     Inform("Setting permissions for user ~p in vhost ~p", [Username, VHost]),
-    call(Node, {rabbit_access_control, set_permissions,
+    call(Node, {rabbit_auth_backend_internal, set_permissions,
                 [Username, VHost, CPerm, WPerm, RPerm]});
 
 action(clear_permissions, Node, [Username], Opts, Inform) ->
     VHost = proplists:get_value(?VHOST_OPT, Opts),
     Inform("Clearing permissions for user ~p in vhost ~p", [Username, VHost]),
-    call(Node, {rabbit_access_control, clear_permissions, [Username, VHost]});
+    call(Node, {rabbit_auth_backend_internal, clear_permissions,
+                [Username, VHost]});
 
 action(list_permissions, Node, [], Opts, Inform) ->
     VHost = proplists:get_value(?VHOST_OPT, Opts),
     Inform("Listing permissions in vhost ~p", [VHost]),
-    display_list(call(Node, {rabbit_access_control, list_vhost_permissions,
-                             [VHost]})).
+    display_list(call(Node, {rabbit_auth_backend_internal,
+                             list_vhost_permissions, [VHost]})).
 
 default_if_empty(List, Default) when is_list(List) ->
     if List == [] ->
diff --git a/src/rabbit_error_logger.erl b/src/rabbit_error_logger.erl
index 42861f86..0120f0d6 100644
--- a/src/rabbit_error_logger.erl
+++ b/src/rabbit_error_logger.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_error_logger).
@@ -49,7 +34,7 @@ boot() ->
 init([DefaultVHost]) ->
     #exchange{} = rabbit_exchange:declare(
                     rabbit_misc:r(DefaultVHost, exchange, ?LOG_EXCH_NAME),
-                    topic, true, false, []),
+                    topic, true, false, false, []),
     {ok, #resource{virtual_host = DefaultVHost,
                    kind = exchange,
                    name = ?LOG_EXCH_NAME}}.
diff --git a/src/rabbit_error_logger_file_h.erl b/src/rabbit_error_logger_file_h.erl
index 875d680f..7e9ebc4f 100644
--- a/src/rabbit_error_logger_file_h.erl
+++ b/src/rabbit_error_logger_file_h.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_error_logger_file_h).
diff --git a/src/rabbit_event.erl b/src/rabbit_event.erl
index 2b236531..40ade4b7 100644
--- a/src/rabbit_event.erl
+++ b/src/rabbit_event.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_event).
@@ -37,7 +22,7 @@
 -export([init_stats_timer/0, ensure_stats_timer/2, stop_stats_timer/1]).
 -export([reset_stats_timer/1]).
 -export([stats_level/1, if_enabled/2]).
--export([notify/2]).
+-export([notify/2, notify_if/3]).
 
 %%----------------------------------------------------------------------------
 
@@ -77,6 +62,7 @@
 -spec(stats_level/1 :: (state()) -> level()).
 -spec(if_enabled/2 :: (state(), timer_fun()) -> 'ok').
 -spec(notify/2 :: (event_type(), event_props()) -> 'ok').
+-spec(notify_if/3 :: (boolean(), event_type(), event_props()) -> 'ok').
 
 -endif.
 
@@ -140,6 +126,9 @@ if_enabled(_State, Fun) ->
     Fun(),
     ok.
 
+notify_if(true,   Type,  Props) -> notify(Type, Props);
+notify_if(false, _Type, _Props) -> ok.
+
 notify(Type, Props) ->
     try
         %% TODO: switch to os:timestamp() when we drop support for
diff --git a/src/rabbit_exchange.erl b/src/rabbit_exchange.erl
index 4c0f341f..92259195 100644
--- a/src/rabbit_exchange.erl
+++ b/src/rabbit_exchange.erl
@@ -1,43 +1,29 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_exchange).
 -include("rabbit.hrl").
 -include("rabbit_framing.hrl").
 
--export([recover/0, declare/5, lookup/1, lookup_or_die/1, list/1, info_keys/0,
+-export([recover/0, declare/6, lookup/1, lookup_or_die/1, list/1, info_keys/0,
          info/1, info/2, info_all/1, info_all/2, publish/2, delete/2]).
+-export([callback/3]).
 %% this must be run inside a mnesia tx
 -export([maybe_auto_delete/1]).
--export([assert_equivalence/5, assert_args_equivalence/2, check_type/1]).
+-export([assert_equivalence/6, assert_args_equivalence/2, check_type/1]).
 
 %%----------------------------------------------------------------------------
 
@@ -49,13 +35,14 @@
 -type(type() :: atom()).
 
 -spec(recover/0 :: () -> 'ok').
--spec(declare/5 ::
-        (name(), type(), boolean(), boolean(), rabbit_framing:amqp_table())
+-spec(declare/6 ::
+        (name(), type(), boolean(), boolean(), boolean(),
+         rabbit_framing:amqp_table())
         -> rabbit_types:exchange()).
 -spec(check_type/1 ::
         (binary()) -> atom() | rabbit_types:connection_exit()).
--spec(assert_equivalence/5 ::
-        (rabbit_types:exchange(), atom(), boolean(), boolean(),
+-spec(assert_equivalence/6 ::
+        (rabbit_types:exchange(), atom(), boolean(), boolean(), boolean(),
          rabbit_framing:amqp_table())
         -> 'ok' | rabbit_types:connection_exit()).
 -spec(assert_args_equivalence/2 ::
@@ -85,12 +72,13 @@
 -spec(maybe_auto_delete/1::
         (rabbit_types:exchange())
         -> 'not_deleted' | {'deleted', rabbit_binding:deletions()}).
+-spec(callback/3:: (rabbit_types:exchange(), atom(), [any()]) -> 'ok').
 
 -endif.
 
 %%----------------------------------------------------------------------------
 
--define(INFO_KEYS, [name, type, durable, auto_delete, arguments]).
+-define(INFO_KEYS, [name, type, durable, auto_delete, internal, arguments]).
 
 recover() ->
     Xs = rabbit_misc:table_fold(
@@ -113,54 +101,53 @@ recover_with_bindings(Bs, [X = #exchange{type = Type} | Xs], Bindings) ->
 recover_with_bindings([], [], []) ->
     ok.
 
-declare(XName, Type, Durable, AutoDelete, Args) ->
+declare(XName, Type, Durable, AutoDelete, Internal, Args) ->
     X = #exchange{name        = XName,
                   type        = Type,
                   durable     = Durable,
                   auto_delete = AutoDelete,
+                  internal    = Internal,
                   arguments   = Args},
-    %% We want to upset things if it isn't ok; this is different from
-    %% the other hooks invocations, where we tend to ignore the return
-    %% value.
-    TypeModule = type_to_module(Type),
-    ok = TypeModule:validate(X),
-    case rabbit_misc:execute_mnesia_transaction(
-           fun () ->
-                   case mnesia:wread({rabbit_exchange, XName}) of
-                       [] ->
-                           ok = mnesia:write(rabbit_exchange, X, write),
-                           ok = case Durable of
-                                    true ->
-                                        mnesia:write(rabbit_durable_exchange,
+    %% We want to upset things if it isn't ok
+    ok = (type_to_module(Type)):validate(X),
+    rabbit_misc:execute_mnesia_transaction(
+      fun () ->
+              case mnesia:wread({rabbit_exchange, XName}) of
+                  [] ->
+                      ok = mnesia:write(rabbit_exchange, X, write),
+                      ok = case Durable of
+                               true  -> mnesia:write(rabbit_durable_exchange,
                                                      X, write);
-                                    false ->
-                                        ok
+                               false -> ok
                            end,
-                           {new, X};
-                       [ExistingX] ->
-                           {existing, ExistingX}
-                   end
-           end) of
-        {new, X}      -> TypeModule:create(X),
-                         rabbit_event:notify(exchange_created, info(X)),
-                         X;
-        {existing, X} -> X;
-        Err           -> Err
-    end.
+                      {new, X};
+                  [ExistingX] ->
+                      {existing, ExistingX}
+              end
+      end,
+      fun ({new, Exchange}, Tx) ->
+              callback(Exchange, create, [Tx, Exchange]),
+              rabbit_event:notify_if(not Tx, exchange_created, info(Exchange)),
+              Exchange;
+          ({existing, Exchange}, _Tx) ->
+              Exchange;
+          (Err, _Tx) ->
+              Err
+      end).
 
 %% Used with atoms from records; e.g., the type is expected to exist.
 type_to_module(T) ->
-    {ok, Module} = rabbit_exchange_type_registry:lookup_module(T),
+    {ok, Module} = rabbit_registry:lookup_module(exchange, T),
     Module.
 
 %% Used with binaries sent over the wire; the type may not exist.
 check_type(TypeBin) ->
-    case rabbit_exchange_type_registry:binary_to_type(TypeBin) of
+    case rabbit_registry:binary_to_type(TypeBin) of
         {error, not_found} ->
             rabbit_misc:protocol_error(
               command_invalid, "unknown exchange type '~s'", [TypeBin]);
         T ->
-            case rabbit_exchange_type_registry:lookup_module(T) of
+            case rabbit_registry:lookup_module(exchange, T) of
                 {error, not_found} -> rabbit_misc:protocol_error(
                                         command_invalid,
                                         "invalid exchange type '~s'", [T]);
@@ -170,14 +157,16 @@ check_type(TypeBin) ->
 
 assert_equivalence(X = #exchange{ durable     = Durable,
                                   auto_delete = AutoDelete,
+                                  internal    = Internal,
                                   type        = Type},
-                   Type, Durable, AutoDelete, RequiredArgs) ->
+                   Type, Durable, AutoDelete, Internal, RequiredArgs) ->
     (type_to_module(Type)):assert_args_equivalence(X, RequiredArgs);
-assert_equivalence(#exchange{ name = Name }, _Type, _Durable, _AutoDelete,
-                   _Args) ->
+assert_equivalence(#exchange{ name = Name },
+                   _Type, _Durable, _Internal, _AutoDelete, _Args) ->
     rabbit_misc:protocol_error(
-      not_allowed,
-      "cannot redeclare ~s with different type, durable or autodelete value",
+      precondition_failed,
+      "cannot redeclare ~s with different type, durable, "
+      "internal or autodelete value",
       [rabbit_misc:rs(Name)]).
 
 assert_args_equivalence(#exchange{ name = Name, arguments = Args },
@@ -215,6 +204,7 @@ i(name,        #exchange{name        = Name})       -> Name;
 i(type,        #exchange{type        = Type})       -> Type;
 i(durable,     #exchange{durable     = Durable})    -> Durable;
 i(auto_delete, #exchange{auto_delete = AutoDelete}) -> AutoDelete;
+i(internal,    #exchange{internal    = Internal})   -> Internal;
 i(arguments,   #exchange{arguments   = Arguments})  -> Arguments;
 i(Item, _) -> throw({bad_argument, Item}).
 
@@ -273,27 +263,28 @@ process_route(#resource{kind = queue} = QName,
               {WorkList, SeenXs, QNames}) ->
     {WorkList, SeenXs, [QName | QNames]}.
 
-call_with_exchange(XName, Fun) ->
+call_with_exchange(XName, Fun, PrePostCommitFun) ->
     rabbit_misc:execute_mnesia_transaction(
       fun () -> case mnesia:read({rabbit_exchange, XName}) of
                    []  -> {error, not_found};
                    [X] -> Fun(X)
                end
-      end).
+      end, PrePostCommitFun).
 
 delete(XName, IfUnused) ->
-    Fun = case IfUnused of
-              true  -> fun conditional_delete/1;
-              false -> fun unconditional_delete/1
-          end,
-    case call_with_exchange(XName, Fun) of
-        {deleted, X, Bs, Deletions} ->
-            ok = rabbit_binding:process_deletions(
-                   rabbit_binding:add_deletion(
-                     XName, {X, deleted, Bs}, Deletions));
-        Error = {error, _InUseOrNotFound} ->
-            Error
-    end.
+    call_with_exchange(
+      XName,
+      case IfUnused of
+          true  -> fun conditional_delete/1;
+          false -> fun unconditional_delete/1
+      end,
+      fun ({deleted, X, Bs, Deletions}, Tx) ->
+              ok = rabbit_binding:process_deletions(
+                     rabbit_binding:add_deletion(
+                       XName, {X, deleted, Bs}, Deletions), Tx);
+          (Error = {error, _InUseOrNotFound}, _Tx) ->
+              Error
+      end).
 
 maybe_auto_delete(#exchange{auto_delete = false}) ->
     not_deleted;
@@ -303,6 +294,9 @@ maybe_auto_delete(#exchange{auto_delete = true} = X) ->
         {deleted, X, [], Deletions} -> {deleted, Deletions}
     end.
 
+callback(#exchange{type = XType}, Fun, Args) ->
+    apply(type_to_module(XType), Fun, Args).
+
 conditional_delete(X = #exchange{name = XName}) ->
     case rabbit_binding:has_for_source(XName) of
         false  -> unconditional_delete(X);
diff --git a/src/rabbit_exchange_type.erl b/src/rabbit_exchange_type.erl
index 742944dc..547583e9 100644
--- a/src/rabbit_exchange_type.erl
+++ b/src/rabbit_exchange_type.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_exchange_type).
@@ -42,19 +27,19 @@ behaviour_info(callbacks) ->
      {validate, 1},
 
      %% called after declaration when previously absent
-     {create, 1},
+     {create, 2},
 
      %% called when recovering
      {recover, 2},
 
      %% called after exchange deletion.
-     {delete, 2},
+     {delete, 3},
 
      %% called after a binding has been added
-     {add_binding, 2},
+     {add_binding, 3},
 
      %% called after bindings have been deleted.
-     {remove_bindings, 2},
+     {remove_bindings, 3},
 
      %% called when comparing exchanges for equivalence - should return ok or
      %% exit with #amqp_error{}
diff --git a/src/rabbit_exchange_type_direct.erl b/src/rabbit_exchange_type_direct.erl
index d934a497..c51b0913 100644
--- a/src/rabbit_exchange_type_direct.erl
+++ b/src/rabbit_exchange_type_direct.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_exchange_type_direct).
@@ -35,15 +20,15 @@
 -behaviour(rabbit_exchange_type).
 
 -export([description/0, route/2]).
--export([validate/1, create/1, recover/2, delete/2,
-         add_binding/2, remove_bindings/2, assert_args_equivalence/2]).
+-export([validate/1, create/2, recover/2, delete/3,
+         add_binding/3, remove_bindings/3, assert_args_equivalence/2]).
 -include("rabbit_exchange_type_spec.hrl").
 
 -rabbit_boot_step({?MODULE,
                    [{description, "exchange type direct"},
-                    {mfa,         {rabbit_exchange_type_registry, register,
-                                   [<<"direct">>, ?MODULE]}},
-                    {requires,    rabbit_exchange_type_registry},
+                    {mfa,         {rabbit_registry, register,
+                                   [exchange, <<"direct">>, ?MODULE]}},
+                    {requires,    rabbit_registry},
                     {enables,     kernel_ready}]}).
 
 description() ->
@@ -55,10 +40,10 @@ route(#exchange{name = Name},
     rabbit_router:match_routing_key(Name, RoutingKey).
 
 validate(_X) -> ok.
-create(_X) -> ok.
+create(_Tx, _X) -> ok.
 recover(_X, _Bs) -> ok.
-delete(_X, _Bs) -> ok.
-add_binding(_X, _B) -> ok.
-remove_bindings(_X, _Bs) -> ok.
+delete(_Tx, _X, _Bs) -> ok.
+add_binding(_Tx, _X, _B) -> ok.
+remove_bindings(_Tx, _X, _Bs) -> ok.
 assert_args_equivalence(X, Args) ->
     rabbit_exchange:assert_args_equivalence(X, Args).
diff --git a/src/rabbit_exchange_type_fanout.erl b/src/rabbit_exchange_type_fanout.erl
index 77ca9686..382fb627 100644
--- a/src/rabbit_exchange_type_fanout.erl
+++ b/src/rabbit_exchange_type_fanout.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_exchange_type_fanout).
@@ -35,15 +20,15 @@
 -behaviour(rabbit_exchange_type).
 
 -export([description/0, route/2]).
--export([validate/1, create/1, recover/2, delete/2, add_binding/2,
-         remove_bindings/2, assert_args_equivalence/2]).
+-export([validate/1, create/2, recover/2, delete/3, add_binding/3,
+         remove_bindings/3, assert_args_equivalence/2]).
 -include("rabbit_exchange_type_spec.hrl").
 
 -rabbit_boot_step({?MODULE,
                    [{description, "exchange type fanout"},
-                    {mfa,         {rabbit_exchange_type_registry, register,
-                                   [<<"fanout">>, ?MODULE]}},
-                    {requires,    rabbit_exchange_type_registry},
+                    {mfa,         {rabbit_registry, register,
+                                   [exchange, <<"fanout">>, ?MODULE]}},
+                    {requires,    rabbit_registry},
                     {enables,     kernel_ready}]}).
 
 description() ->
@@ -54,10 +39,10 @@ route(#exchange{name = Name}, _Delivery) ->
     rabbit_router:match_routing_key(Name, '_').
 
 validate(_X) -> ok.
-create(_X) -> ok.
+create(_Tx, _X) -> ok.
 recover(_X, _Bs) -> ok.
-delete(_X, _Bs) -> ok.
-add_binding(_X, _B) -> ok.
-remove_bindings(_X, _Bs) -> ok.
+delete(_Tx, _X, _Bs) -> ok.
+add_binding(_Tx, _X, _B) -> ok.
+remove_bindings(_Tx, _X, _Bs) -> ok.
 assert_args_equivalence(X, Args) ->
     rabbit_exchange:assert_args_equivalence(X, Args).
diff --git a/src/rabbit_exchange_type_headers.erl b/src/rabbit_exchange_type_headers.erl
index ec9e7ba4..d3529b06 100644
--- a/src/rabbit_exchange_type_headers.erl
+++ b/src/rabbit_exchange_type_headers.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_exchange_type_headers).
@@ -36,15 +21,15 @@
 -behaviour(rabbit_exchange_type).
 
 -export([description/0, route/2]).
--export([validate/1, create/1, recover/2, delete/2, add_binding/2,
-         remove_bindings/2, assert_args_equivalence/2]).
+-export([validate/1, create/2, recover/2, delete/3, add_binding/3,
+         remove_bindings/3, assert_args_equivalence/2]).
 -include("rabbit_exchange_type_spec.hrl").
 
 -rabbit_boot_step({?MODULE,
                    [{description, "exchange type headers"},
-                    {mfa,         {rabbit_exchange_type_registry, register,
-                                   [<<"headers">>, ?MODULE]}},
-                    {requires,    rabbit_exchange_type_registry},
+                    {mfa,         {rabbit_registry, register,
+                                   [exchange, <<"headers">>, ?MODULE]}},
+                    {requires,    rabbit_registry},
                     {enables,     kernel_ready}]}).
 
 -ifdef(use_specs).
@@ -128,10 +113,10 @@ headers_match([{PK, PT, PV} | PRest], [{DK, DT, DV} | DRest],
     headers_match(PRest, DRest, AllMatch1, AnyMatch1, MatchKind).
 
 validate(_X) -> ok.
-create(_X) -> ok.
+create(_Tx, _X) -> ok.
 recover(_X, _Bs) -> ok.
-delete(_X, _Bs) -> ok.
-add_binding(_X, _B) -> ok.
-remove_bindings(_X, _Bs) -> ok.
+delete(_Tx, _X, _Bs) -> ok.
+add_binding(_Tx, _X, _B) -> ok.
+remove_bindings(_Tx, _X, _Bs) -> ok.
 assert_args_equivalence(X, Args) ->
     rabbit_exchange:assert_args_equivalence(X, Args).
diff --git a/src/rabbit_exchange_type_topic.erl b/src/rabbit_exchange_type_topic.erl
index d3ecdd4d..9cbf8100 100644
--- a/src/rabbit_exchange_type_topic.erl
+++ b/src/rabbit_exchange_type_topic.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_exchange_type_topic).
@@ -35,15 +20,15 @@
 -behaviour(rabbit_exchange_type).
 
 -export([description/0, route/2]).
--export([validate/1, create/1, recover/2, delete/2, add_binding/2,
-         remove_bindings/2, assert_args_equivalence/2]).
+-export([validate/1, create/2, recover/2, delete/3, add_binding/3,
+         remove_bindings/3, assert_args_equivalence/2]).
 -include("rabbit_exchange_type_spec.hrl").
 
 -rabbit_boot_step({?MODULE,
                    [{description, "exchange type topic"},
-                    {mfa,         {rabbit_exchange_type_registry, register,
-                                   [<<"topic">>, ?MODULE]}},
-                    {requires,    rabbit_exchange_type_registry},
+                    {mfa,         {rabbit_registry, register,
+                                   [exchange, <<"topic">>, ?MODULE]}},
+                    {requires,    rabbit_registry},
                     {enables,     kernel_ready}]}).
 
 -export([topic_matches/2]).
@@ -94,10 +79,10 @@ last_topic_match(P, R, [BacktrackNext | BacktrackList]) ->
         last_topic_match(P, [BacktrackNext | R], BacktrackList).
 
 validate(_X) -> ok.
-create(_X) -> ok.
+create(_Tx, _X) -> ok.
 recover(_X, _Bs) -> ok.
-delete(_X, _Bs) -> ok.
-add_binding(_X, _B) -> ok.
-remove_bindings(_X, _Bs) -> ok.
+delete(_Tx, _X, _Bs) -> ok.
+add_binding(_Tx, _X, _B) -> ok.
+remove_bindings(_Tx, _X, _Bs) -> ok.
 assert_args_equivalence(X, Args) ->
     rabbit_exchange:assert_args_equivalence(X, Args).
diff --git a/src/rabbit_framing.erl b/src/rabbit_framing.erl
index a0c8f4d5..da1a6a49 100644
--- a/src/rabbit_framing.erl
+++ b/src/rabbit_framing.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 %% TODO auto-generate
diff --git a/src/rabbit_framing_channel.erl b/src/rabbit_framing_channel.erl
deleted file mode 100644
index cb53185f..00000000
--- a/src/rabbit_framing_channel.erl
+++ /dev/null
@@ -1,129 +0,0 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
-%%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
-%%
-%%   The Original Code is RabbitMQ.
-%%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
-%%
-
--module(rabbit_framing_channel).
--include("rabbit.hrl").
-
--export([start_link/3, process/2, shutdown/1]).
-
-%% internal
--export([mainloop/3]).
-
-%%--------------------------------------------------------------------
-
-start_link(Parent, ChannelPid, Protocol) ->
-    {ok, proc_lib:spawn_link(
-           fun () -> mainloop(Parent, ChannelPid, Protocol) end)}.
-
-process(Pid, Frame) ->
-    Pid ! {frame, Frame},
-    ok.
-
-shutdown(Pid) ->
-    Pid ! terminate,
-    ok.
-
-%%--------------------------------------------------------------------
-
-read_frame(ChannelPid) ->
-    receive
-        {frame, Frame}         -> Frame;
-        terminate              -> rabbit_channel:shutdown(ChannelPid),
-                                  read_frame(ChannelPid);
-        Msg                    -> exit({unexpected_message, Msg})
-    end.
-
-mainloop(Parent, ChannelPid, Protocol) ->
-    case read_frame(ChannelPid) of
-        {method, MethodName, FieldsBin} ->
-            Method = Protocol:decode_method_fields(MethodName, FieldsBin),
-            case Protocol:method_has_content(MethodName) of
-                true  -> {ClassId, _MethodId} = Protocol:method_id(MethodName),
-                         case collect_content(ChannelPid, ClassId, Protocol) of
-                             {ok, Content} ->
-                                 rabbit_channel:do(ChannelPid, Method, Content),
-                                 ?MODULE:mainloop(Parent, ChannelPid, Protocol);
-                             {error, Reason} ->
-                                 channel_exit(Parent, Reason, MethodName)
-                         end;
-                false -> rabbit_channel:do(ChannelPid, Method),
-                         ?MODULE:mainloop(Parent, ChannelPid, Protocol)
-            end;
-        _ ->
-            channel_exit(Parent, {unexpected_frame,
-                                  "expected method frame, "
-                                  "got non method frame instead",
-                                  []}, none)
-    end.
-
-collect_content(ChannelPid, ClassId, Protocol) ->
-    case read_frame(ChannelPid) of
-        {content_header, ClassId, 0, BodySize, PropertiesBin} ->
-            case collect_content_payload(ChannelPid, BodySize, []) of
-                {ok, Payload} -> {ok, #content{
-                                    class_id = ClassId,
-                                    properties = none,
-                                    properties_bin = PropertiesBin,
-                                    protocol = Protocol,
-                                    payload_fragments_rev = Payload}};
-                Error         -> Error
-            end;
-        {content_header, HeaderClassId, 0, _BodySize, _PropertiesBin} ->
-            {error, {unexpected_frame,
-                     "expected content header for class ~w, "
-                     "got one for class ~w instead",
-                     [ClassId, HeaderClassId]}};
-        _ ->
-            {error, {unexpected_frame,
-                     "expected content header for class ~w, "
-                     "got non content header frame instead",
-                     [ClassId]}}
-    end.
-
-collect_content_payload(_ChannelPid, 0, Acc) ->
-    {ok, Acc};
-collect_content_payload(ChannelPid, RemainingByteCount, Acc) ->
-    case read_frame(ChannelPid) of
-        {content_body, FragmentBin} ->
-            collect_content_payload(ChannelPid,
-                                    RemainingByteCount - size(FragmentBin),
-                                    [FragmentBin | Acc]);
-        _ ->
-            {error, {unexpected_frame,
-                     "expected content body, "
-                     "got non content body frame instead",
-                     []}}
-    end.
-
-channel_exit(Parent, {ErrorName, ExplanationFormat, Params}, MethodName) ->
-    Reason = rabbit_misc:amqp_error(ErrorName, ExplanationFormat, Params,
-                                    MethodName),
-    Parent ! {channel_exit, self(), Reason}.
diff --git a/src/rabbit_guid.erl b/src/rabbit_guid.erl
index e7d0c101..234bc55b 100644
--- a/src/rabbit_guid.erl
+++ b/src/rabbit_guid.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_guid).
diff --git a/src/rabbit_heartbeat.erl b/src/rabbit_heartbeat.erl
index 589bf7cc..177ae868 100644
--- a/src/rabbit_heartbeat.erl
+++ b/src/rabbit_heartbeat.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_heartbeat).
diff --git a/src/rabbit_invariable_queue.erl b/src/rabbit_invariable_queue.erl
deleted file mode 100644
index 5a0532ea..00000000
--- a/src/rabbit_invariable_queue.erl
+++ /dev/null
@@ -1,314 +0,0 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
-%%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
-%%
-%%   The Original Code is RabbitMQ.
-%%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
-%%
-
--module(rabbit_invariable_queue).
-
--export([init/3, terminate/1, delete_and_terminate/1, purge/1, publish/3,
-         publish_delivered/4, fetch/2, ack/2, tx_publish/4, tx_ack/3,
-         dropwhile/2, tx_rollback/2, tx_commit/4, requeue/3, len/1, is_empty/1,
-         set_ram_duration_target/2, ram_duration/1, needs_idle_timeout/1,
-         idle_timeout/1, handle_pre_hibernate/1, status/1]).
-
--export([start/1, stop/0]).
-
--behaviour(rabbit_backing_queue).
-
--include("rabbit.hrl").
-
--record(iv_state, { queue, qname, durable, len, pending_ack }).
--record(tx, { pending_messages, pending_acks, is_persistent }).
-
--ifdef(use_specs).
-
--type(ack() :: rabbit_guid:guid() | 'blank_ack').
--type(state() :: #iv_state { queue       :: queue(),
-                             qname       :: rabbit_amqqueue:name(),
-                             len         :: non_neg_integer(),
-                             pending_ack :: dict()
-                           }).
--include("rabbit_backing_queue_spec.hrl").
-
--endif.
-
-start(DurableQueues) ->
-    ok = rabbit_sup:start_child(rabbit_persister, [DurableQueues]).
-
-stop() ->
-    ok = rabbit_sup:stop_child(rabbit_persister).
-
-init(QName, IsDurable, Recover) ->
-    Q = queue:from_list(case IsDurable andalso Recover of
-                            true  -> rabbit_persister:queue_content(QName);
-                            false -> []
-                        end),
-    #iv_state { queue       = Q,
-                qname       = QName,
-                durable     = IsDurable,
-                len         = queue:len(Q),
-                pending_ack = dict:new() }.
-
-terminate(State) ->
-    State #iv_state { queue = queue:new(), len = 0, pending_ack = dict:new() }.
-
-delete_and_terminate(State = #iv_state { qname = QName, durable = IsDurable,
-                                         pending_ack = PA }) ->
-    ok = persist_acks(QName, IsDurable, none, dict:fetch_keys(PA), PA),
-    {_PLen, State1} = purge(State),
-    terminate(State1).
-
-purge(State = #iv_state { queue = Q, qname = QName, durable = IsDurable,
-                          len = Len }) ->
-    %% We do not purge messages pending acks.
-    {AckTags, PA} =
-        rabbit_misc:queue_fold(
-          fun ({#basic_message { is_persistent = false },
-                _MsgProps, _IsDelivered}, Acc) ->
-                  Acc;
-              ({Msg = #basic_message { guid = Guid }, MsgProps, IsDelivered},
-               {AckTagsN, PAN}) ->
-                  ok = persist_delivery(QName, IsDurable, IsDelivered, Msg),
-                  {[Guid | AckTagsN], store_ack(Msg, MsgProps, PAN)}
-          end, {[], dict:new()}, Q),
-    ok = persist_acks(QName, IsDurable, none, AckTags, PA),
-    {Len, State #iv_state { len = 0, queue = queue:new() }}.
-
-publish(Msg, MsgProps, State = #iv_state { queue   = Q,
-                                           qname   = QName,
-                                           durable = IsDurable,
-                                           len     = Len }) ->
-    ok = persist_message(QName, IsDurable, none, Msg, MsgProps),
-    State #iv_state { queue = enqueue(Msg, MsgProps, false, Q), len = Len + 1 }.
-
-publish_delivered(false, _Msg, _MsgProps, State) ->
-    {blank_ack, State};
-publish_delivered(true, Msg = #basic_message { guid = Guid },
-                  MsgProps,
-                  State = #iv_state { qname = QName, durable = IsDurable,
-                                      len = 0, pending_ack = PA }) ->
-    ok = persist_message(QName, IsDurable, none, Msg, MsgProps),
-    ok = persist_delivery(QName, IsDurable, false, Msg),
-    {Guid, State #iv_state { pending_ack = store_ack(Msg, MsgProps, PA) }}.
-
-dropwhile(_Pred, State = #iv_state { len = 0 }) ->
-    State;
-dropwhile(Pred, State = #iv_state { queue = Q }) ->
-    {{value, {Msg, MsgProps, IsDelivered}}, Q1} = queue:out(Q),
-    case Pred(MsgProps) of
-        true  -> {_, State1} = fetch_internal(false, Q1, Msg, MsgProps,
-                                              IsDelivered, State),
-                 dropwhile(Pred, State1);
-        false -> State
-     end.
-
-fetch(_AckRequired, State = #iv_state { len = 0 }) ->
-    {empty, State};
-fetch(AckRequired, State = #iv_state { queue = Q }) ->
-    {{value, {Msg, MsgProps, IsDelivered}}, Q1} = queue:out(Q),
-    fetch_internal(AckRequired, Q1, Msg, MsgProps, IsDelivered, State).
-
-fetch_internal(AckRequired, Q1,
-               Msg = #basic_message { guid = Guid },
-               MsgProps, IsDelivered,
-               State = #iv_state { len         = Len,
-                                   qname       = QName,
-                                   durable     = IsDurable,
-                                   pending_ack = PA }) ->
-    Len1 = Len - 1,
-    ok = persist_delivery(QName, IsDurable, IsDelivered, Msg),
-    PA1 = store_ack(Msg, MsgProps, PA),
-    {AckTag, PA2} = case AckRequired of
-                        true  -> {Guid, PA1};
-                        false -> ok = persist_acks(QName, IsDurable, none,
-                                                   [Guid], PA1),
-                                 {blank_ack, PA}
-                    end,
-    {{Msg, IsDelivered, AckTag, Len1},
-     State #iv_state { queue = Q1, len = Len1, pending_ack = PA2 }}.
-
-ack(AckTags, State = #iv_state { qname = QName, durable = IsDurable,
-                                 pending_ack = PA }) ->
-    ok = persist_acks(QName, IsDurable, none, AckTags, PA),
-    PA1 = remove_acks(AckTags, PA),
-    State #iv_state { pending_ack = PA1 }.
-
-tx_publish(Txn, Msg, MsgProps, State = #iv_state { qname   = QName,
-                                                   durable = IsDurable }) ->
-    Tx = #tx { pending_messages = Pubs } = lookup_tx(Txn),
-    store_tx(Txn, Tx #tx { pending_messages = [{Msg, MsgProps} | Pubs] }),
-    ok = persist_message(QName, IsDurable, Txn, Msg, MsgProps),
-    State.
-
-tx_ack(Txn, AckTags, State = #iv_state { qname = QName, durable = IsDurable,
-                                         pending_ack = PA }) ->
-    Tx = #tx { pending_acks = Acks } = lookup_tx(Txn),
-    store_tx(Txn, Tx #tx { pending_acks = [AckTags | Acks] }),
-    ok = persist_acks(QName, IsDurable, Txn, AckTags, PA),
-    State.
-
-tx_rollback(Txn, State = #iv_state { qname = QName }) ->
-    #tx { pending_acks = AckTags } = lookup_tx(Txn),
-    ok = do_if_persistent(fun rabbit_persister:rollback_transaction/1,
-                          Txn, QName),
-    erase_tx(Txn),
-    {lists:flatten(AckTags), State}.
-
-tx_commit(Txn, Fun, MsgPropsFun, State = #iv_state { qname       = QName,
-                                                     pending_ack = PA,
-                                                     queue       = Q,
-                                                     len         = Len }) ->
-    #tx { pending_acks = AckTags, pending_messages = PubsRev } = lookup_tx(Txn),
-    ok = do_if_persistent(fun rabbit_persister:commit_transaction/1,
-                          Txn, QName),
-    erase_tx(Txn),
-    Fun(),
-    AckTags1 = lists:flatten(AckTags),
-    PA1 = remove_acks(AckTags1, PA),
-    {Q1, Len1} = lists:foldr(fun ({Msg, MsgProps}, {QN, LenN}) ->
-                                     {enqueue(Msg, MsgPropsFun(MsgProps),
-                                              false, QN),
-                                      LenN + 1}
-                             end, {Q, Len}, PubsRev),
-    {AckTags1, State #iv_state { pending_ack = PA1, queue = Q1, len = Len1 }}.
-
-requeue(AckTags, MsgPropsFun, State = #iv_state { pending_ack = PA,
-                                                  queue       = Q,
-                                                  len         = Len }) ->
-    %% We don't need to touch the persister here - the persister will
-    %% already have these messages published and delivered as
-    %% necessary. The complication is that the persister's seq_id will
-    %% now be wrong, given the position of these messages in our queue
-    %% here. However, the persister's seq_id is only used for sorting
-    %% on startup, and requeue is silent as to where the requeued
-    %% messages should appear, thus the persister is permitted to sort
-    %% based on seq_id, even though it'll likely give a different
-    %% order to the last known state of our queue, prior to shutdown.
-    {Q1, Len1} = lists:foldl(
-                   fun (Guid, {QN, LenN}) ->
-                           {Msg = #basic_message {}, MsgProps}
-                               = dict:fetch(Guid, PA),
-                           {enqueue(Msg, MsgPropsFun(MsgProps), true, QN),
-                            LenN + 1}
-                   end, {Q, Len}, AckTags),
-    PA1 = remove_acks(AckTags, PA),
-    State #iv_state { pending_ack = PA1, queue = Q1, len = Len1 }.
-
-enqueue(Msg, MsgProps, IsDelivered, Q) ->
-    queue:in({Msg, MsgProps, IsDelivered}, Q).
-
-len(#iv_state { len = Len }) -> Len.
-
-is_empty(State) -> 0 == len(State).
-
-set_ram_duration_target(_DurationTarget, State) -> State.
-
-ram_duration(State) -> {0, State}.
-
-needs_idle_timeout(_State) -> false.
-
-idle_timeout(State) -> State.
-
-handle_pre_hibernate(State) -> State.
-
-status(_State) -> [].
-
-%%----------------------------------------------------------------------------
-
-remove_acks(AckTags, PA) -> lists:foldl(fun dict:erase/2, PA, AckTags).
-
-store_ack(Msg = #basic_message { guid = Guid }, MsgProps, PA) ->
-    dict:store(Guid, {Msg, MsgProps}, PA).
-
-%%----------------------------------------------------------------------------
-
-lookup_tx(Txn) ->
-    case get({txn, Txn}) of
-        undefined -> #tx { pending_messages = [],
-                           pending_acks     = [],
-                           is_persistent    = false };
-        V         -> V
-    end.
-
-store_tx(Txn, Tx) ->
-    put({txn, Txn}, Tx).
-
-erase_tx(Txn) ->
-    erase({txn, Txn}).
-
-mark_tx_persistent(Txn) ->
-    store_tx(Txn, (lookup_tx(Txn)) #tx { is_persistent = true }).
-
-is_tx_persistent(Txn) ->
-    (lookup_tx(Txn)) #tx.is_persistent.
-
-do_if_persistent(F, Txn, QName) ->
-    ok = case is_tx_persistent(Txn) of
-             false -> ok;
-             true  -> F({Txn, QName})
-         end.
-
-%%----------------------------------------------------------------------------
-
-persist_message(QName, true, Txn, Msg = #basic_message {
-                                    is_persistent = true }, MsgProps) ->
-    Msg1 = Msg #basic_message {
-             %% don't persist any recoverable decoded properties
-             content = rabbit_binary_parser:clear_decoded_content(
-                         Msg #basic_message.content)},
-    persist_work(Txn, QName,
-                 [{publish, Msg1, MsgProps,
-                   {QName, Msg1 #basic_message.guid}}]);
-persist_message(_QName, _IsDurable, _Txn, _Msg, _MsgProps) ->
-    ok.
-
-persist_delivery(QName, true, false, #basic_message { is_persistent = true,
-                                                      guid = Guid }) ->
-    persist_work(none, QName, [{deliver, {QName, Guid}}]);
-persist_delivery(_QName, _IsDurable, _IsDelivered, _Msg) ->
-    ok.
-
-persist_acks(QName, true, Txn, AckTags, PA) ->
-    persist_work(Txn, QName,
-                 [{ack, {QName, Guid}} || Guid <- AckTags,
-                                          begin
-                                              {Msg, _MsgProps}
-                                                  = dict:fetch(Guid, PA),
-                                              Msg #basic_message.is_persistent
-                                          end]);
-persist_acks(_QName, _IsDurable, _Txn, _AckTags, _PA) ->
-    ok.
-
-persist_work(_Txn,_QName, []) ->
-    ok;
-persist_work(none, _QName, WorkList) ->
-    rabbit_persister:dirty_work(WorkList);
-persist_work(Txn, QName, WorkList) ->
-    mark_tx_persistent(Txn),
-    rabbit_persister:extend_transaction({Txn, QName}, WorkList).
diff --git a/src/rabbit_limiter.erl b/src/rabbit_limiter.erl
index be1dcad1..86ea7282 100644
--- a/src/rabbit_limiter.erl
+++ b/src/rabbit_limiter.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_limiter).
diff --git a/src/rabbit_log.erl b/src/rabbit_log.erl
index 863f77e7..8207d6bc 100644
--- a/src/rabbit_log.erl
+++ b/src/rabbit_log.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_log).
@@ -41,9 +26,6 @@
 -export([debug/1, debug/2, message/4, info/1, info/2,
          warning/1, warning/2, error/1, error/2]).
 
--import(io).
--import(error_logger).
-
 -define(SERVER, ?MODULE).
 
 %%----------------------------------------------------------------------------
diff --git a/src/rabbit_memory_monitor.erl b/src/rabbit_memory_monitor.erl
index bb4d77a4..2f8c940b 100644
--- a/src/rabbit_memory_monitor.erl
+++ b/src/rabbit_memory_monitor.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 
diff --git a/src/rabbit_misc.erl b/src/rabbit_misc.erl
index 230f4db5..03317d70 100644
--- a/src/rabbit_misc.erl
+++ b/src/rabbit_misc.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_misc).
@@ -46,8 +31,10 @@
 -export([enable_cover/1, report_cover/1]).
 -export([start_cover/1]).
 -export([throw_on_error/2, with_exit_handler/2, filter_exit_map/2]).
--export([with_user/2, with_vhost/2, with_user_and_vhost/3]).
+-export([with_user/2, with_user_and_vhost/3]).
 -export([execute_mnesia_transaction/1]).
+-export([execute_mnesia_transaction/2]).
+-export([execute_mnesia_tx_with_tail/1]).
 -export([ensure_ok/2]).
 -export([makenode/1, nodeparts/1, cookie_hash/0, tcp_name/3]).
 -export([upmap/2, map_in_order/2]).
@@ -61,25 +48,23 @@
 -export([sort_field_table/1]).
 -export([pid_to_string/1, string_to_pid/1]).
 -export([version_compare/2, version_compare/3]).
--export([recursive_delete/1, dict_cons/3, orddict_cons/3,
+-export([recursive_delete/1, recursive_copy/2, dict_cons/3, orddict_cons/3,
          unlink_and_capture_exit/1]).
 -export([get_options/2]).
 -export([all_module_attributes/1, build_acyclic_graph/3]).
 -export([now_ms/0]).
-
--import(mnesia).
--import(lists).
--import(cover).
--import(disk_log).
+-export([lock_file/1]).
+-export([const_ok/1, const/1]).
 
 %%----------------------------------------------------------------------------
 
 -ifdef(use_specs).
 
--export_type([resource_name/0]).
+-export_type([resource_name/0, thunk/1, const/1]).
 
 -type(ok_or_error() :: rabbit_types:ok_or_error(any())).
 -type(thunk(T) :: fun(() -> T)).
+-type(const(T) :: fun((any()) -> T)).
 -type(resource_name() :: binary()).
 -type(optdef() :: {flag, string()} | {option, string(), any()}).
 -type(channel_or_connection_exit()
@@ -141,12 +126,15 @@
         (atom(), thunk(rabbit_types:error(any()) | {ok, A} | A)) -> A).
 -spec(with_exit_handler/2 :: (thunk(A), thunk(A)) -> A).
 -spec(filter_exit_map/2 :: (fun ((A) -> B), [A]) -> [B]).
--spec(with_user/2 :: (rabbit_access_control:username(), thunk(A)) -> A).
--spec(with_vhost/2 :: (rabbit_types:vhost(), thunk(A)) -> A).
+-spec(with_user/2 :: (rabbit_types:username(), thunk(A)) -> A).
 -spec(with_user_and_vhost/3 ::
-        (rabbit_access_control:username(), rabbit_types:vhost(), thunk(A))
+        (rabbit_types:username(), rabbit_types:vhost(), thunk(A))
         -> A).
 -spec(execute_mnesia_transaction/1 :: (thunk(A)) -> A).
+-spec(execute_mnesia_transaction/2 ::
+        (thunk(A), fun ((A, boolean()) -> B)) -> B).
+-spec(execute_mnesia_tx_with_tail/1 ::
+        (thunk(fun ((boolean()) -> B))) -> B | (fun ((boolean()) -> B))).
 -spec(ensure_ok/2 :: (ok_or_error(), atom()) -> 'ok').
 -spec(makenode/1 :: ({string(), string()} | string()) -> node()).
 -spec(nodeparts/1 :: (node() | string()) -> {string(), string()}).
@@ -183,6 +171,9 @@
 -spec(recursive_delete/1 ::
         ([file:filename()])
         -> rabbit_types:ok_or_error({file:filename(), any()})).
+-spec(recursive_copy/2 ::
+        (file:filename(), file:filename())
+        -> rabbit_types:ok_or_error({file:filename(), file:filename(), any()})).
 -spec(dict_cons/3 :: (any(), any(), dict()) -> dict()).
 -spec(orddict_cons/3 :: (any(), any(), orddict:orddict()) -> orddict:orddict()).
 -spec(unlink_and_capture_exit/1 :: (pid()) -> 'ok').
@@ -197,6 +188,9 @@
                                                {bad_edge, [digraph:vertex()]}),
                                       digraph:vertex(), digraph:vertex()})).
 -spec(now_ms/0 :: () -> non_neg_integer()).
+-spec(lock_file/1 :: (file:filename()) -> rabbit_types:ok_or_error('eexist')).
+-spec(const_ok/1 :: (any()) -> 'ok').
+-spec(const/1 :: (A) -> const(A)).
 
 -endif.
 
@@ -242,7 +236,7 @@ assert_args_equivalence1(Orig, New, Name, Key) ->
     case {table_lookup(Orig, Key), table_lookup(New, Key)} of
         {Same, Same}  -> ok;
         {Orig1, New1} -> protocol_error(
-                           not_allowed,
+                           precondition_failed,
                            "inequivalent arg '~s' for ~s:  "
                            "required ~w, received ~w",
                            [Key, rabbit_misc:rs(Name), New1, Orig1])
@@ -344,8 +338,8 @@ throw_on_error(E, Thunk) ->
 with_exit_handler(Handler, Thunk) ->
     try
         Thunk()
-    catch
-        exit:{R, _} when R =:= noproc; R =:= normal; R =:= shutdown ->
+    catch exit:{R, _} when R =:= noproc; R =:= nodedown;
+                           R =:= normal; R =:= shutdown ->
             Handler()
     end.
 
@@ -366,19 +360,8 @@ with_user(Username, Thunk) ->
             end
     end.
 
-with_vhost(VHostPath, Thunk) ->
-    fun () ->
-            case mnesia:read({rabbit_vhost, VHostPath}) of
-                [] ->
-                    mnesia:abort({no_such_vhost, VHostPath});
-                [_V] ->
-                    Thunk()
-            end
-    end.
-
 with_user_and_vhost(Username, VHostPath, Thunk) ->
-    with_user(Username, with_vhost(VHostPath, Thunk)).
-
+    with_user(Username, rabbit_vhost:with(VHostPath, Thunk)).
 
 execute_mnesia_transaction(TxFun) ->
     %% Making this a sync_transaction allows us to use dirty_read
@@ -389,6 +372,35 @@ execute_mnesia_transaction(TxFun) ->
         {aborted, Reason} -> throw({error, Reason})
     end.
 
+
+%% Like execute_mnesia_transaction/1 with additional Pre- and Post-
+%% commit function
+execute_mnesia_transaction(TxFun, PrePostCommitFun) ->
+    case mnesia:is_transaction() of
+        true  -> throw(unexpected_transaction);
+        false -> ok
+    end,
+    PrePostCommitFun(execute_mnesia_transaction(
+                       fun () ->
+                               Result = TxFun(),
+                               PrePostCommitFun(Result, true),
+                               Result
+                       end), false).
+
+%% Like execute_mnesia_transaction/2, but TxFun is expected to return a
+%% TailFun which gets called immediately before and after the tx commit
+execute_mnesia_tx_with_tail(TxFun) ->
+    case mnesia:is_transaction() of
+        true  -> execute_mnesia_transaction(TxFun);
+        false -> TailFun = execute_mnesia_transaction(
+                             fun () ->
+                                     TailFun1 = TxFun(),
+                                     TailFun1(true),
+                                     TailFun1
+                             end),
+                 TailFun(false)
+    end.
+
 ensure_ok(ok, _) -> ok;
 ensure_ok({error, Reason}, ErrorTag) -> throw({error, {ErrorTag, Reason}}).
 
@@ -589,19 +601,19 @@ sort_field_table(Arguments) ->
 pid_to_string(Pid) when is_pid(Pid) ->
     %% see http://erlang.org/doc/apps/erts/erl_ext_dist.html (8.10 and
     %% 8.7)
-    <<131,103,100,NodeLen:16,NodeBin:NodeLen/binary,Id:32,Ser:32,_Cre:8>>
+    <<131,103,100,NodeLen:16,NodeBin:NodeLen/binary,Id:32,Ser:32,Cre:8>>
         = term_to_binary(Pid),
     Node = binary_to_term(<<131,100,NodeLen:16,NodeBin:NodeLen/binary>>),
-    lists:flatten(io_lib:format("<~w.~B.~B>", [Node, Id, Ser])).
+    lists:flatten(io_lib:format("<~w.~B.~B.~B>", [Node, Cre, Id, Ser])).
 
 %% inverse of above
 string_to_pid(Str) ->
     Err = {error, {invalid_pid_syntax, Str}},
     %% The \ before the trailing $ is only there to keep emacs
     %% font-lock from getting confused.
-    case re:run(Str, "^<(.*)\\.([0-9]+)\\.([0-9]+)>\$",
+    case re:run(Str, "^<(.*)\\.(\\d+)\\.(\\d+)\\.(\\d+)>\$",
                 [{capture,all_but_first,list}]) of
-        {match, [NodeStr, IdStr, SerStr]} ->
+        {match, [NodeStr, CreStr, IdStr, SerStr]} ->
             %% the NodeStr atom might be quoted, so we have to parse
             %% it rather than doing a simple list_to_atom
             NodeAtom = case erl_scan:string(NodeStr) of
@@ -609,9 +621,9 @@ string_to_pid(Str) ->
                            {error, _, _} -> throw(Err)
                        end,
             <<131,NodeEnc/binary>> = term_to_binary(NodeAtom),
-            Id = list_to_integer(IdStr),
-            Ser = list_to_integer(SerStr),
-            binary_to_term(<<131,103,NodeEnc/binary,Id:32,Ser:32,0:8>>);
+            [Cre, Id, Ser] = lists:map(fun list_to_integer/1,
+                                       [CreStr, IdStr, SerStr]),
+            binary_to_term(<<131,103,NodeEnc/binary,Id:32,Ser:32,Cre:8>>);
         nomatch ->
             throw(Err)
     end.
@@ -687,6 +699,33 @@ recursive_delete1(Path) ->
                  end
     end.
 
+recursive_copy(Src, Dest) ->
+    case filelib:is_dir(Src) of
+        false -> case file:copy(Src, Dest) of
+                     {ok, _Bytes}    -> ok;
+                     {error, enoent} -> ok; %% Path doesn't exist anyway
+                     {error, Err}    -> {error, {Src, Dest, Err}}
+                 end;
+        true  -> case file:list_dir(Src) of
+                     {ok, FileNames} ->
+                         case file:make_dir(Dest) of
+                             ok ->
+                                 lists:foldl(
+                                   fun (FileName, ok) ->
+                                           recursive_copy(
+                                             filename:join(Src, FileName),
+                                             filename:join(Dest, FileName));
+                                       (_FileName, Error) ->
+                                           Error
+                                   end, ok, FileNames);
+                             {error, Err} ->
+                                 {error, {Src, Dest, Err}}
+                         end;
+                     {error, Err} ->
+                         {error, {Src, Dest, Err}}
+                 end
+    end.
+
 dict_cons(Key, Value, Dict) ->
     dict:update(Key, fun (List) -> [Value | List] end, [Value], Dict).
 
@@ -781,3 +820,15 @@ build_acyclic_graph(VertexFun, EdgeFun, Graph) ->
             true = digraph:delete(G),
             {error, Reason}
     end.
+
+%% TODO: When we stop supporting Erlang prior to R14, this should be
+%% replaced with file:open [write, exclusive]
+lock_file(Path) ->
+    case filelib:is_file(Path) of
+        true  -> {error, eexist};
+        false -> {ok, Lock} = file:open(Path, [write]),
+                 ok = file:close(Lock)
+    end.
+
+const_ok(_) -> ok.
+const(X) -> fun (_) -> X end.
diff --git a/src/rabbit_mnesia.erl b/src/rabbit_mnesia.erl
index cb3251c7..a9b4e177 100644
--- a/src/rabbit_mnesia.erl
+++ b/src/rabbit_mnesia.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 
@@ -34,7 +19,8 @@
 
 -export([ensure_mnesia_dir/0, dir/0, status/0, init/0, is_db_empty/0,
          cluster/1, force_cluster/1, reset/0, force_reset/0,
-         is_clustered/0, empty_ram_only_tables/0]).
+         is_clustered/0, running_clustered_nodes/0, all_clustered_nodes/0,
+         empty_ram_only_tables/0, copy_db/1]).
 
 -export([table_names/0]).
 
@@ -63,8 +49,11 @@
 -spec(reset/0 :: () -> 'ok').
 -spec(force_reset/0 :: () -> 'ok').
 -spec(is_clustered/0 :: () -> boolean()).
+-spec(running_clustered_nodes/0 :: () -> [node()]).
+-spec(all_clustered_nodes/0 :: () -> [node()]).
 -spec(empty_ram_only_tables/0 :: () -> 'ok').
 -spec(create_tables/0 :: () -> 'ok').
+-spec(copy_db/1 :: (file:filename()) ->  rabbit_types:ok_or_error(any())).
 
 -endif.
 
@@ -80,12 +69,12 @@ status() ->
                                 Nodes = nodes_of_type(CopyType),
                                 Nodes =/= []
                             end];
-                 no -> case mnesia:system_info(db_nodes) of
+                 no -> case all_clustered_nodes() of
                            [] -> [];
                            Nodes -> [{unknown, Nodes}]
                        end
              end},
-     {running_nodes, mnesia:system_info(running_db_nodes)}].
+     {running_nodes, running_clustered_nodes()}].
 
 init() ->
     ok = ensure_mnesia_running(),
@@ -126,9 +115,15 @@ reset()       -> reset(false).
 force_reset() -> reset(true).
 
 is_clustered() ->
-    RunningNodes = mnesia:system_info(running_db_nodes),
+    RunningNodes = running_clustered_nodes(),
     [node()] /= RunningNodes andalso [] /= RunningNodes.
 
+all_clustered_nodes() ->
+    mnesia:system_info(db_nodes).
+
+running_clustered_nodes() ->
+    mnesia:system_info(running_db_nodes).
+
 empty_ram_only_tables() ->
     Node = node(),
     lists:foreach(
@@ -153,10 +148,10 @@ nodes_of_type(Type) ->
 
 table_definitions() ->
     [{rabbit_user,
-      [{record_name, user},
-       {attributes, record_info(fields, user)},
+      [{record_name, internal_user},
+       {attributes, record_info(fields, internal_user)},
        {disc_copies, [node()]},
-       {match, #user{_='_'}}]},
+       {match, #internal_user{_='_'}}]},
      {rabbit_user_permission,
       [{record_name, user_permission},
        {attributes, record_info(fields, user_permission)},
@@ -371,25 +366,22 @@ init_db(ClusterNodes, Force) ->
                          end;
                 true  -> ok
             end,
-            case {Nodes, mnesia:system_info(use_dir),
-                  mnesia:system_info(db_nodes)} of
+            case {Nodes, mnesia:system_info(use_dir), all_clustered_nodes()} of
                 {[], true, [_]} ->
                     %% True single disc node, attempt upgrade
-                    wait_for_tables(),
+                    ok = wait_for_tables(),
                     case rabbit_upgrade:maybe_upgrade() of
-                        ok ->
-                            ensure_schema_ok();
-                        version_not_available ->
-                            schema_ok_or_move()
+                        ok                    -> ensure_schema_ok();
+                        version_not_available -> schema_ok_or_move()
                     end;
                 {[], true, _} ->
                     %% "Master" (i.e. without config) disc node in cluster,
                     %% verify schema
-                    wait_for_tables(),
+                    ok = wait_for_tables(),
                     ensure_version_ok(rabbit_upgrade:read_version()),
                     ensure_schema_ok();
                 {[], false, _} ->
-                    %% First RAM node in cluster, start from scratch
+                    %% Nothing there at all, start from scratch
                     ok = create_schema();
                 {[AnotherNode|_], _, _} ->
                     %% Subsequent node in cluster, catch up
@@ -476,6 +468,16 @@ move_db() ->
     rabbit_misc:ensure_ok(mnesia:start(), cannot_start_mnesia),
     ok.
 
+copy_db(Destination) ->
+    mnesia:stop(),
+    case rabbit_misc:recursive_copy(dir(), Destination) of
+        ok ->
+            rabbit_misc:ensure_ok(mnesia:start(), cannot_start_mnesia),
+            ok = wait_for_tables();
+        {error, E} ->
+            {error, E}
+    end.
+
 create_tables() ->
     lists:foreach(fun ({Tab, TabDef}) ->
                           TabDef1 = proplists:delete(match, TabDef),
@@ -557,8 +559,8 @@ reset(Force) ->
             {Nodes, RunningNodes} =
                 try
                     ok = init(),
-                    {mnesia:system_info(db_nodes) -- [Node],
-                     mnesia:system_info(running_db_nodes) -- [Node]}
+                    {all_clustered_nodes() -- [Node],
+                     running_clustered_nodes() -- [Node]}
                 after
                     mnesia:stop()
                 end,
diff --git a/src/rabbit_msg_file.erl b/src/rabbit_msg_file.erl
index 4f178439..cfea4982 100644
--- a/src/rabbit_msg_file.erl
+++ b/src/rabbit_msg_file.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_msg_file).
diff --git a/src/rabbit_msg_store.erl b/src/rabbit_msg_store.erl
index fd84109b..529e3e07 100644
--- a/src/rabbit_msg_store.erl
+++ b/src/rabbit_msg_store.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_msg_store).
@@ -34,8 +19,8 @@
 -behaviour(gen_server2).
 
 -export([start_link/4, successfully_recovered_state/1,
-         client_init/2, client_terminate/1, client_delete_and_terminate/1,
-         client_ref/1,
+         client_init/4, client_terminate/1, client_delete_and_terminate/1,
+         client_ref/1, close_all_indicated/1,
          write/3, read/2, contains/2, remove/2, release/2, sync/3]).
 
 -export([sync/1, set_maximum_since_use/2,
@@ -81,9 +66,12 @@
           file_summary_ets,       %% tid of the file summary table
           dedup_cache_ets,        %% tid of dedup cache table
           cur_file_cache_ets,     %% tid of current file cache table
-          client_refs,            %% set of references of all registered clients
+          dying_clients,          %% set of dying clients
+          clients,                %% map of references of all registered clients
+                                  %% to callbacks
           successfully_recovered, %% boolean: did we recover state?
-          file_size_limit         %% how big are our files allowed to get?
+          file_size_limit,        %% how big are our files allowed to get?
+          cref_to_guids           %% client ref to synced messages mapping
          }).
 
 -record(client_msstate,
@@ -108,6 +96,7 @@
           index_module,
           index_state,
           file_summary_ets,
+          file_handles_ets,
           msg_store
         }).
 
@@ -121,6 +110,7 @@
                                 index_module     :: atom(),
                                 index_state      :: any(),
                                 file_summary_ets :: ets:tid(),
+                                file_handles_ets :: ets:tid(),
                                 msg_store        :: server()
                               }).
 
@@ -138,16 +128,20 @@
                       file_handles_ets   :: ets:tid(),
                       file_summary_ets   :: ets:tid(),
                       dedup_cache_ets    :: ets:tid(),
-                      cur_file_cache_ets :: ets:tid() }).
+                      cur_file_cache_ets :: ets:tid()}).
 -type(startup_fun_state() ::
         {(fun ((A) -> 'finished' | {rabbit_guid:guid(), non_neg_integer(), A})),
          A}).
+-type(maybe_guid_fun() :: 'undefined' | fun ((gb_set()) -> any())).
+-type(maybe_close_fds_fun() :: 'undefined' | fun (() -> 'ok')).
+-type(deletion_thunk() :: fun (() -> boolean())).
 
 -spec(start_link/4 ::
         (atom(), file:filename(), [binary()] | 'undefined',
          startup_fun_state()) -> rabbit_types:ok_pid_or_error()).
 -spec(successfully_recovered_state/1 :: (server()) -> boolean()).
--spec(client_init/2 :: (server(), client_ref()) -> client_msstate()).
+-spec(client_init/4 :: (server(), client_ref(), maybe_guid_fun(),
+                        maybe_close_fds_fun()) -> client_msstate()).
 -spec(client_terminate/1 :: (client_msstate()) -> 'ok').
 -spec(client_delete_and_terminate/1 :: (client_msstate()) -> 'ok').
 -spec(client_ref/1 :: (client_msstate()) -> client_ref()).
@@ -164,8 +158,8 @@
 -spec(set_maximum_since_use/2 :: (server(), non_neg_integer()) -> 'ok').
 -spec(has_readers/2 :: (non_neg_integer(), gc_state()) -> boolean()).
 -spec(combine_files/3 :: (non_neg_integer(), non_neg_integer(), gc_state()) ->
-                              'ok').
--spec(delete_file/2 :: (non_neg_integer(), gc_state()) -> 'ok').
+                              deletion_thunk()).
+-spec(delete_file/2 :: (non_neg_integer(), gc_state()) -> deletion_thunk()).
 
 -endif.
 
@@ -302,6 +296,17 @@
 %% sure that reads are not attempted from files which are in the
 %% process of being garbage collected.
 %%
+%% When a message is removed, its reference count is decremented. Even
+%% if the reference count becomes 0, its entry is not removed. This is
+%% because in the event of the same message being sent to several
+%% different queues, there is the possibility of one queue writing and
+%% removing the message before other queues write it at all. Thus
+%% accomodating 0-reference counts allows us to avoid unnecessary
+%% writes here. Of course, there are complications: the file to which
+%% the message has already been written could be locked pending
+%% deletion or GC, which means we have to rewrite the message as the
+%% original copy will now be lost.
+%%
 %% The server automatically defers reads, removes and contains calls
 %% that occur which refer to files which are currently being
 %% GC'd. Contains calls are only deferred in order to ensure they do
@@ -319,6 +324,55 @@
 %% heavily overloaded, clients can still write and read messages with
 %% very low latency and not block at all.
 %%
+%% Clients of the msg_store are required to register before using the
+%% msg_store. This provides them with the necessary client-side state
+%% to allow them to directly access the various caches and files. When
+%% they terminate, they should deregister. They can do this by calling
+%% either client_terminate/1 or client_delete_and_terminate/1. The
+%% differences are: (a) client_terminate is synchronous. As a result,
+%% if the msg_store is badly overloaded and has lots of in-flight
+%% writes and removes to process, this will take some time to
+%% return. However, once it does return, you can be sure that all the
+%% actions you've issued to the msg_store have been processed. (b) Not
+%% only is client_delete_and_terminate/1 asynchronous, but it also
+%% permits writes and subsequent removes from the current
+%% (terminating) client which are still in flight to be safely
+%% ignored. Thus from the point of view of the msg_store itself, and
+%% all from the same client:
+%%
+%% (T) = termination; (WN) = write of msg N; (RN) = remove of msg N
+%% --> W1, W2, W1, R1, T, W3, R2, W2, R1, R2, R3, W4 -->
+%%
+%% The client obviously sent T after all the other messages (up to
+%% W4), but because the msg_store prioritises messages, the T can be
+%% promoted and thus received early.
+%%
+%% Thus at the point of the msg_store receiving T, we have messages 1
+%% and 2 with a refcount of 1. After T, W3 will be ignored because
+%% it's an unknown message, as will R3, and W4. W2, R1 and R2 won't be
+%% ignored because the messages that they refer to were already known
+%% to the msg_store prior to T. However, it can be a little more
+%% complex: after the first R2, the refcount of msg 2 is 0. At that
+%% point, if a GC occurs or file deletion, msg 2 could vanish, which
+%% would then mean that the subsequent W2 and R2 are then ignored.
+%%
+%% The use case then for client_delete_and_terminate/1 is if the
+%% client wishes to remove everything it's written to the msg_store:
+%% it issues removes for all messages it's written and not removed,
+%% and then calls client_delete_and_terminate/1. At that point, any
+%% in-flight writes (and subsequent removes) can be ignored, but
+%% removes and writes for messages the msg_store already knows about
+%% will continue to be processed normally (which will normally just
+%% involve modifying the reference count, which is fast). Thus we save
+%% disk bandwidth for writes which are going to be immediately removed
+%% again by the the terminating client.
+%%
+%% We use a separate set to keep track of the dying clients in order
+%% to keep that set, which is inspected on every write and remove, as
+%% small as possible. Inspecting the set of all clients would degrade
+%% performance with many healthy clients and few, if any, dying
+%% clients, which is the typical case.
+%%
 %% For notes on Clean Shutdown and startup, see documentation in
 %% variable_queue.
 
@@ -334,10 +388,11 @@ start_link(Server, Dir, ClientRefs, StartupFunState) ->
 successfully_recovered_state(Server) ->
     gen_server2:call(Server, successfully_recovered_state, infinity).
 
-client_init(Server, Ref) ->
+client_init(Server, Ref, MsgOnDiskFun, CloseFDsFun) ->
     {IState, IModule, Dir, GCPid,
      FileHandlesEts, FileSummaryEts, DedupCacheEts, CurFileCacheEts} =
-        gen_server2:call(Server, {new_client_state, Ref}, infinity),
+        gen_server2:call(
+          Server, {new_client_state, Ref, MsgOnDiskFun, CloseFDsFun}, infinity),
     #client_msstate { server             = Server,
                       client_ref         = Ref,
                       file_handle_cache  = dict:new(),
@@ -350,20 +405,22 @@ client_init(Server, Ref) ->
                       dedup_cache_ets    = DedupCacheEts,
                       cur_file_cache_ets = CurFileCacheEts }.
 
-client_terminate(CState) ->
+client_terminate(CState = #client_msstate { client_ref = Ref }) ->
     close_all_handles(CState),
-    ok = server_call(CState, client_terminate).
+    ok = server_call(CState, {client_terminate, Ref}).
 
 client_delete_and_terminate(CState = #client_msstate { client_ref = Ref }) ->
     close_all_handles(CState),
+    ok = server_cast(CState, {client_dying, Ref}),
     ok = server_cast(CState, {client_delete, Ref}).
 
 client_ref(#client_msstate { client_ref = Ref }) -> Ref.
 
 write(Guid, Msg,
-      CState = #client_msstate { cur_file_cache_ets = CurFileCacheEts }) ->
+      CState = #client_msstate { cur_file_cache_ets = CurFileCacheEts,
+                                 client_ref         = CRef }) ->
     ok = update_msg_cache(CurFileCacheEts, Guid, Msg),
-    ok = server_cast(CState, {write, Guid}).
+    ok = server_cast(CState, {write, CRef, Guid}).
 
 read(Guid,
      CState = #client_msstate { dedup_cache_ets    = DedupCacheEts,
@@ -392,7 +449,8 @@ read(Guid,
 
 contains(Guid, CState) -> server_call(CState, {contains, Guid}).
 remove([],    _CState) -> ok;
-remove(Guids,  CState) -> server_cast(CState, {remove, Guids}).
+remove(Guids, CState = #client_msstate { client_ref = CRef }) ->
+    server_cast(CState, {remove, CRef, Guids}).
 release([],   _CState) -> ok;
 release(Guids, CState) -> server_cast(CState, {release, Guids}).
 sync(Guids, K, CState) -> server_cast(CState, {sync, Guids, K}).
@@ -454,7 +512,8 @@ client_read3(#msg_location { guid = Guid, file = File }, Defer,
              CState = #client_msstate { file_handles_ets = FileHandlesEts,
                                         file_summary_ets = FileSummaryEts,
                                         dedup_cache_ets  = DedupCacheEts,
-                                        gc_pid           = GCPid }) ->
+                                        gc_pid           = GCPid,
+                                        client_ref       = Ref }) ->
     Release =
         fun() -> ok = case ets:update_counter(FileSummaryEts, File,
                                               {#file_summary.readers, -1}) of
@@ -501,9 +560,14 @@ client_read3(#msg_location { guid = Guid, file = File }, Defer,
             case index_lookup(Guid, CState) of
                 #msg_location { file = File } = MsgLocation ->
                     %% Still the same file.
-                    mark_handle_open(FileHandlesEts, File),
-
-                    CState1 = close_all_indicated(CState),
+                    {ok, CState1} = close_all_indicated(CState),
+                    %% We are now guaranteed that the mark_handle_open
+                    %% call will either insert_new correctly, or will
+                    %% fail, but find the value is open, not close.
+                    mark_handle_open(FileHandlesEts, File, Ref),
+                    %% Could the msg_store now mark the file to be
+                    %% closed? No: marks for closing are issued only
+                    %% when the msg_store has locked the file.
                     {Msg, CState2} = %% This will never be the current file
                         read_from_disk(MsgLocation, CState1, DedupCacheEts),
                     Release(), %% this MUST NOT fail with badarg
@@ -519,6 +583,12 @@ client_read3(#msg_location { guid = Guid, file = File }, Defer,
             end
     end.
 
+clear_client(CRef, State = #msstate { cref_to_guids = CTG,
+                                      dying_clients = DyingClients }) ->
+    State #msstate { cref_to_guids = dict:erase(CRef, CTG),
+                     dying_clients = sets:del_element(CRef, DyingClients) }.
+
+
 %%----------------------------------------------------------------------------
 %% gen_server callbacks
 %%----------------------------------------------------------------------------
@@ -552,6 +622,8 @@ init([Server, BaseDir, ClientRefs, StartupFunState]) ->
     {CleanShutdown, IndexState, ClientRefs1} =
         recover_index_and_client_refs(IndexModule, FileSummaryRecovered,
                                       ClientRefs, Dir, Server),
+    Clients = dict:from_list(
+                [{CRef, {undefined, undefined}} || CRef <- ClientRefs1]),
     %% CleanShutdown => msg location index and file_summary both
     %% recovered correctly.
     true = case {FileSummaryRecovered, CleanShutdown} of
@@ -584,9 +656,11 @@ init([Server, BaseDir, ClientRefs, StartupFunState]) ->
                        file_summary_ets       = FileSummaryEts,
                        dedup_cache_ets        = DedupCacheEts,
                        cur_file_cache_ets     = CurFileCacheEts,
-                       client_refs            = ClientRefs1,
+                       dying_clients          = sets:new(),
+                       clients                = Clients,
                        successfully_recovered = CleanShutdown,
-                       file_size_limit        = FileSizeLimit
+                       file_size_limit        = FileSizeLimit,
+                       cref_to_guids          = dict:new()
                       },
 
     %% If we didn't recover the msg location index then we need to
@@ -605,6 +679,7 @@ init([Server, BaseDir, ClientRefs, StartupFunState]) ->
                                 index_module     = IndexModule,
                                 index_state      = IndexState,
                                 file_summary_ets = FileSummaryEts,
+                                file_handles_ets = FileHandlesEts,
                                 msg_store        = self()
                               }),
 
@@ -615,10 +690,10 @@ init([Server, BaseDir, ClientRefs, StartupFunState]) ->
 
 prioritise_call(Msg, _From, _State) ->
     case Msg of
-        successfully_recovered_state -> 7;
-        {new_client_state, _Ref}     -> 7;
-        {read, _Guid}                -> 2;
-        _                            -> 0
+        successfully_recovered_state                  -> 7;
+        {new_client_state, _Ref, _MODC, _CloseFDsFun} -> 7;
+        {read, _Guid}                                 -> 2;
+        _                                             -> 0
     end.
 
 prioritise_cast(Msg, _State) ->
@@ -627,28 +702,30 @@ prioritise_cast(Msg, _State) ->
         {combine_files, _Source, _Destination, _Reclaimed} -> 8;
         {delete_file, _File, _Reclaimed}                   -> 8;
         {set_maximum_since_use, _Age}                      -> 8;
+        {client_dying, _Pid}                               -> 7;
         _                                                  -> 0
     end.
 
 handle_call(successfully_recovered_state, _From, State) ->
     reply(State #msstate.successfully_recovered, State);
 
-handle_call({new_client_state, CRef}, _From,
-            State = #msstate { dir                = Dir,
-                               index_state        = IndexState,
-                               index_module       = IndexModule,
-                               file_handles_ets   = FileHandlesEts,
-                               file_summary_ets   = FileSummaryEts,
-                               dedup_cache_ets    = DedupCacheEts,
-                               cur_file_cache_ets = CurFileCacheEts,
-                               client_refs        = ClientRefs,
-                               gc_pid             = GCPid }) ->
+handle_call({new_client_state, CRef, MsgOnDiskFun, CloseFDsFun}, _From,
+            State = #msstate { dir                    = Dir,
+                               index_state            = IndexState,
+                               index_module           = IndexModule,
+                               file_handles_ets       = FileHandlesEts,
+                               file_summary_ets       = FileSummaryEts,
+                               dedup_cache_ets        = DedupCacheEts,
+                               cur_file_cache_ets     = CurFileCacheEts,
+                               clients                = Clients,
+                               gc_pid                 = GCPid }) ->
+    Clients1 = dict:store(CRef, {MsgOnDiskFun, CloseFDsFun}, Clients),
     reply({IndexState, IndexModule, Dir, GCPid,
            FileHandlesEts, FileSummaryEts, DedupCacheEts, CurFileCacheEts},
-          State #msstate { client_refs = sets:add_element(CRef, ClientRefs) });
+          State #msstate { clients = Clients1 });
 
-handle_call(client_terminate, _From, State) ->
-    reply(ok, State);
+handle_call({client_terminate, CRef}, _From, State) ->
+    reply(ok, clear_client(CRef, State));
 
 handle_call({read, Guid}, From, State) ->
     State1 = read_message(Guid, From, State),
@@ -658,45 +735,55 @@ handle_call({contains, Guid}, From, State) ->
     State1 = contains_message(Guid, From, State),
     noreply(State1).
 
-handle_cast({client_delete, CRef},
-            State = #msstate { client_refs = ClientRefs }) ->
-    noreply(
-      State #msstate { client_refs = sets:del_element(CRef, ClientRefs) });
+handle_cast({client_dying, CRef},
+            State = #msstate { dying_clients = DyingClients }) ->
+    DyingClients1 = sets:add_element(CRef, DyingClients),
+    write_message(CRef, <<>>, State #msstate { dying_clients = DyingClients1 });
+
+handle_cast({client_delete, CRef}, State = #msstate { clients = Clients }) ->
+    State1 = State #msstate { clients = dict:erase(CRef, Clients) },
+    noreply(remove_message(CRef, CRef, clear_client(CRef, State1)));
 
-handle_cast({write, Guid},
-            State = #msstate { sum_valid_data     = SumValid,
-                               file_summary_ets   = FileSummaryEts,
+handle_cast({write, CRef, Guid},
+            State = #msstate { file_summary_ets   = FileSummaryEts,
                                cur_file_cache_ets = CurFileCacheEts }) ->
     true = 0 =< ets:update_counter(CurFileCacheEts, Guid, {3, -1}),
     [{Guid, Msg, _CacheRefCount}] = ets:lookup(CurFileCacheEts, Guid),
-    case index_lookup(Guid, State) of
-        not_found ->
-            write_message(Guid, Msg, State);
-        #msg_location { ref_count = 0, file = File, total_size = TotalSize } ->
-            case ets:lookup(FileSummaryEts, File) of
-                [#file_summary { locked = true }] ->
+    case should_mask_action(CRef, Guid, State) of
+        {true, _Location} ->
+            noreply(State);
+        {false, not_found} ->
+            write_message(CRef, Guid, Msg, State);
+        {Mask, #msg_location { ref_count = 0, file = File,
+                               total_size = TotalSize }} ->
+            case {Mask, ets:lookup(FileSummaryEts, File)} of
+                {false, [#file_summary { locked = true }]} ->
                     ok = index_delete(Guid, State),
-                    write_message(Guid, Msg, State);
-                [#file_summary {}] ->
+                    write_message(CRef, Guid, Msg, State);
+                {false_if_increment, [#file_summary { locked = true }]} ->
+                    %% The msg for Guid is older than the client death
+                    %% message, but as it is being GC'd currently,
+                    %% we'll have to write a new copy, which will then
+                    %% be younger, so ignore this write.
+                    noreply(State);
+                {_Mask, [#file_summary {}]} ->
                     ok = index_update_ref_count(Guid, 1, State),
-                    [_] = ets:update_counter(
-                            FileSummaryEts, File,
-                            [{#file_summary.valid_total_size, TotalSize}]),
-                    noreply(State #msstate {
-                              sum_valid_data = SumValid + TotalSize })
+                    State1 = client_confirm_if_on_disk(CRef, Guid, File, State),
+                    noreply(adjust_valid_total_size(File, TotalSize, State1))
             end;
-        #msg_location { ref_count = RefCount } ->
+        {_Mask, #msg_location { ref_count = RefCount, file = File }} ->
             %% We already know about it, just update counter. Only
             %% update field otherwise bad interaction with concurrent GC
             ok = index_update_ref_count(Guid, RefCount + 1, State),
-            noreply(State)
+            noreply(client_confirm_if_on_disk(CRef, Guid, File, State))
     end;
 
-handle_cast({remove, Guids}, State) ->
+handle_cast({remove, CRef, Guids}, State) ->
     State1 = lists:foldl(
-               fun (Guid, State2) -> remove_message(Guid, State2) end,
+               fun (Guid, State2) -> remove_message(Guid, CRef, State2) end,
                State, Guids),
-    noreply(maybe_compact(State1));
+    noreply(maybe_compact(
+              client_confirm(CRef, gb_sets:from_list(Guids), removed, State1)));
 
 handle_cast({release, Guids}, State =
                 #msstate { dedup_cache_ets = DedupCacheEts }) ->
@@ -725,10 +812,11 @@ handle_cast(sync, State) ->
 handle_cast({combine_files, Source, Destination, Reclaimed},
             State = #msstate { sum_file_size    = SumFileSize,
                                file_handles_ets = FileHandlesEts,
-                               file_summary_ets = FileSummaryEts }) ->
+                               file_summary_ets = FileSummaryEts,
+                               clients          = Clients }) ->
     ok = cleanup_after_file_deletion(Source, State),
-    %% see comment in cleanup_after_file_deletion
-    true = mark_handle_to_close(FileHandlesEts, Destination),
+    %% see comment in cleanup_after_file_deletion, and client_read3
+    true = mark_handle_to_close(Clients, FileHandlesEts, Destination, false),
     true = ets:update_element(FileSummaryEts, Destination,
                               {#file_summary.locked, false}),
     State1 = State #msstate { sum_file_size = SumFileSize - Reclaimed },
@@ -758,7 +846,7 @@ terminate(_Reason, State = #msstate { index_state         = IndexState,
                                       file_summary_ets    = FileSummaryEts,
                                       dedup_cache_ets     = DedupCacheEts,
                                       cur_file_cache_ets  = CurFileCacheEts,
-                                      client_refs         = ClientRefs,
+                                      clients             = Clients,
                                       dir                 = Dir }) ->
     %% stop the gc first, otherwise it could be working and we pull
     %% out the ets tables from under it.
@@ -774,7 +862,7 @@ terminate(_Reason, State = #msstate { index_state         = IndexState,
     [ets:delete(T) ||
         T <- [FileSummaryEts, DedupCacheEts, FileHandlesEts, CurFileCacheEts]],
     IndexModule:terminate(IndexState),
-    store_recovery_terms([{client_refs, sets:to_list(ClientRefs)},
+    store_recovery_terms([{client_refs, dict:fetch_keys(Clients)},
                           {index_module, IndexModule}], Dir),
     State3 #msstate { index_state         = undefined,
                       current_file_handle = undefined }.
@@ -794,14 +882,19 @@ reply(Reply, State) ->
     {State1, Timeout} = next_state(State),
     {reply, Reply, State1, Timeout}.
 
-next_state(State = #msstate { on_sync = [], sync_timer_ref = undefined }) ->
-    {State, hibernate};
-next_state(State = #msstate { sync_timer_ref = undefined }) ->
-    {start_sync_timer(State), 0};
-next_state(State = #msstate { on_sync = [] }) ->
-    {stop_sync_timer(State), hibernate};
-next_state(State) ->
-    {State, 0}.
+next_state(State = #msstate { sync_timer_ref = undefined,
+                              on_sync        = Syncs,
+                              cref_to_guids  = CTG }) ->
+    case {Syncs, dict:size(CTG)} of
+        {[], 0} -> {State, hibernate};
+        _       -> {start_sync_timer(State), 0}
+    end;
+next_state(State = #msstate { on_sync       = Syncs,
+                              cref_to_guids = CTG }) ->
+    case {Syncs, dict:size(CTG)} of
+        {[], 0} -> {stop_sync_timer(State), hibernate};
+        _       -> {State, 0}
+    end.
 
 start_sync_timer(State = #msstate { sync_timer_ref = undefined }) ->
     {ok, TRef} = timer:apply_after(?SYNC_INTERVAL, ?MODULE, sync, [self()]),
@@ -814,14 +907,25 @@ stop_sync_timer(State = #msstate { sync_timer_ref = TRef }) ->
     State #msstate { sync_timer_ref = undefined }.
 
 internal_sync(State = #msstate { current_file_handle = CurHdl,
-                                 on_sync = Syncs }) ->
+                                 on_sync             = Syncs,
+                                 cref_to_guids       = CTG }) ->
     State1 = stop_sync_timer(State),
-    case Syncs of
-        [] -> State1;
-        _  -> ok = file_handle_cache:sync(CurHdl),
-              lists:foreach(fun (K) -> K() end, lists:reverse(Syncs)),
-              State1 #msstate { on_sync = [] }
-    end.
+    CGs = dict:fold(fun (CRef, Guids, NS) ->
+                            case gb_sets:is_empty(Guids) of
+                                true  -> NS;
+                                false -> [{CRef, Guids} | NS]
+                            end
+                    end, [], CTG),
+    case {Syncs, CGs} of
+        {[], []} -> ok;
+        _        -> file_handle_cache:sync(CurHdl)
+    end,
+    [K() || K <- lists:reverse(Syncs)],
+    [client_confirm(CRef, Guids, written, State1) || {CRef, Guids} <- CGs],
+    State1 #msstate { cref_to_guids = dict:new(), on_sync = [] }.
+
+write_message(CRef, Guid, Msg, State) ->
+    write_message(Guid, Msg, record_pending_confirm(CRef, Guid, State)).
 
 write_message(Guid, Msg,
               State = #msstate { current_file_handle = CurHdl,
@@ -934,34 +1038,43 @@ contains_message(Guid, From,
             end
     end.
 
-remove_message(Guid, State = #msstate { sum_valid_data   = SumValid,
-                                        file_summary_ets = FileSummaryEts,
-                                        dedup_cache_ets  = DedupCacheEts }) ->
-    #msg_location { ref_count = RefCount, file = File,
-                    total_size = TotalSize } =
-        index_lookup_positive_ref_count(Guid, State),
-    %% only update field, otherwise bad interaction with concurrent GC
-    Dec = fun () -> index_update_ref_count(Guid, RefCount - 1, State) end,
-    case RefCount of
-        %% don't remove from CUR_FILE_CACHE_ETS_NAME here because
-        %% there may be further writes in the mailbox for the same
-        %% msg.
-        1 -> ok = remove_cache_entry(DedupCacheEts, Guid),
-             case ets:lookup(FileSummaryEts, File) of
-                 [#file_summary { locked = true } ] ->
-                     add_to_pending_gc_completion({remove, Guid}, File, State);
-                 [#file_summary {}] ->
+remove_message(Guid, CRef,
+               State = #msstate { file_summary_ets = FileSummaryEts,
+                                  dedup_cache_ets  = DedupCacheEts }) ->
+    case should_mask_action(CRef, Guid, State) of
+        {true, _Location} ->
+            State;
+        {false_if_increment, #msg_location { ref_count = 0 }} ->
+            %% CRef has tried to both write and remove this msg
+            %% whilst it's being GC'd. ASSERTION:
+            %% [#file_summary { locked = true }] =
+            %%    ets:lookup(FileSummaryEts, File),
+            State;
+        {_Mask, #msg_location { ref_count = RefCount, file = File,
+                                total_size = TotalSize }} when RefCount > 0 ->
+            %% only update field, otherwise bad interaction with
+            %% concurrent GC
+            Dec =
+                fun () -> index_update_ref_count(Guid, RefCount - 1, State) end,
+            case RefCount of
+                %% don't remove from CUR_FILE_CACHE_ETS_NAME here
+                %% because there may be further writes in the mailbox
+                %% for the same msg.
+                1 -> ok = remove_cache_entry(DedupCacheEts, Guid),
+                     case ets:lookup(FileSummaryEts, File) of
+                         [#file_summary { locked = true }] ->
+                             add_to_pending_gc_completion(
+                               {remove, Guid, CRef}, File, State);
+                         [#file_summary {}] ->
+                             ok = Dec(),
+                             delete_file_if_empty(
+                               File, adjust_valid_total_size(File, -TotalSize,
+                                                             State))
+                     end;
+                _ -> ok = decrement_cache(DedupCacheEts, Guid),
                      ok = Dec(),
-                     [_] = ets:update_counter(
-                             FileSummaryEts, File,
-                             [{#file_summary.valid_total_size, -TotalSize}]),
-                     delete_file_if_empty(
-                       File, State #msstate {
-                               sum_valid_data = SumValid - TotalSize })
-             end;
-        _ -> ok = decrement_cache(DedupCacheEts, Guid),
-             ok = Dec(),
-             State
+                     State
+            end
     end.
 
 add_to_pending_gc_completion(
@@ -983,8 +1096,8 @@ run_pending_action({read, Guid, From}, State) ->
     read_message(Guid, From, State);
 run_pending_action({contains, Guid, From}, State) ->
     contains_message(Guid, From, State);
-run_pending_action({remove, Guid}, State) ->
-    remove_message(Guid, State).
+run_pending_action({remove, Guid, CRef}, State) ->
+    remove_message(Guid, CRef, State).
 
 safe_ets_update_counter(Tab, Key, UpdateOp, SuccessFun, FailThunk) ->
     try
@@ -995,10 +1108,80 @@ safe_ets_update_counter(Tab, Key, UpdateOp, SuccessFun, FailThunk) ->
 safe_ets_update_counter_ok(Tab, Key, UpdateOp, FailThunk) ->
     safe_ets_update_counter(Tab, Key, UpdateOp, fun (_) -> ok end, FailThunk).
 
+adjust_valid_total_size(File, Delta, State = #msstate {
+                                       sum_valid_data   = SumValid,
+                                       file_summary_ets = FileSummaryEts }) ->
+    [_] = ets:update_counter(FileSummaryEts, File,
+                             [{#file_summary.valid_total_size, Delta}]),
+    State #msstate { sum_valid_data = SumValid + Delta }.
+
 orddict_store(Key, Val, Dict) ->
     false = orddict:is_key(Key, Dict),
     orddict:store(Key, Val, Dict).
 
+update_pending_confirms(Fun, CRef, State = #msstate { clients       = Clients,
+                                                      cref_to_guids = CTG }) ->
+    case dict:fetch(CRef, Clients) of
+        {undefined,    _CloseFDsFun} -> State;
+        {MsgOnDiskFun, _CloseFDsFun} -> CTG1 = Fun(MsgOnDiskFun, CTG),
+                                        State #msstate { cref_to_guids = CTG1 }
+    end.
+
+record_pending_confirm(CRef, Guid, State) ->
+    update_pending_confirms(
+      fun (_MsgOnDiskFun, CTG) ->
+              dict:update(CRef, fun (Guids) -> gb_sets:add(Guid, Guids) end,
+                          gb_sets:singleton(Guid), CTG)
+      end, CRef, State).
+
+client_confirm_if_on_disk(CRef, Guid, CurFile,
+                          State = #msstate { current_file = CurFile }) ->
+    record_pending_confirm(CRef, Guid, State);
+client_confirm_if_on_disk(CRef, Guid, _File, State) ->
+    update_pending_confirms(
+      fun (MsgOnDiskFun, CTG) ->
+              MsgOnDiskFun(gb_sets:singleton(Guid), written),
+              CTG
+      end, CRef, State).
+
+client_confirm(CRef, Guids, ActionTaken, State) ->
+    update_pending_confirms(
+      fun (MsgOnDiskFun, CTG) ->
+              MsgOnDiskFun(Guids, ActionTaken),
+              case dict:find(CRef, CTG) of
+                  {ok, Gs} -> Guids1 = gb_sets:difference(Gs, Guids),
+                              case gb_sets:is_empty(Guids1) of
+                                  true  -> dict:erase(CRef, CTG);
+                                  false -> dict:store(CRef, Guids1, CTG)
+                              end;
+                  error    -> CTG
+              end
+      end, CRef, State).
+
+%% Detect whether the Guid is older or younger than the client's death
+%% msg (if there is one). If the msg is older than the client death
+%% msg, and it has a 0 ref_count we must only alter the ref_count, not
+%% rewrite the msg - rewriting it would make it younger than the death
+%% msg and thus should be ignored. Note that this (correctly) returns
+%% false when testing to remove the death msg itself.
+should_mask_action(CRef, Guid,
+                   State = #msstate { dying_clients = DyingClients }) ->
+    case {sets:is_element(CRef, DyingClients), index_lookup(Guid, State)} of
+        {false, Location} ->
+            {false, Location};
+        {true, not_found} ->
+            {true, not_found};
+        {true, #msg_location { file = File, offset = Offset,
+                               ref_count = RefCount } = Location} ->
+            #msg_location { file = DeathFile, offset = DeathOffset } =
+                index_lookup(CRef, State),
+            {case {{DeathFile, DeathOffset} < {File, Offset}, RefCount} of
+                 {true,  _} -> true;
+                 {false, 0} -> false_if_increment;
+                 {false, _} -> false
+             end, Location}
+    end.
+
 %%----------------------------------------------------------------------------
 %% file helper functions
 %%----------------------------------------------------------------------------
@@ -1020,29 +1203,54 @@ close_handle(Key, FHC) ->
         error     -> FHC
     end.
 
-mark_handle_open(FileHandlesEts, File) ->
-    %% This is fine to fail (already exists)
-    ets:insert_new(FileHandlesEts, {{self(), File}, open}),
+mark_handle_open(FileHandlesEts, File, Ref) ->
+    %% This is fine to fail (already exists). Note it could fail with
+    %% the value being close, and not have it updated to open.
+    ets:insert_new(FileHandlesEts, {{Ref, File}, open}),
     true.
 
-mark_handle_to_close(FileHandlesEts, File) ->
-    [ ets:update_element(FileHandlesEts, Key, {2, close})
-      || {Key, open} <- ets:match_object(FileHandlesEts, {{'_', File}, open}) ],
+%% See comment in client_read3 - only call this when the file is locked
+mark_handle_to_close(ClientRefs, FileHandlesEts, File, Invoke) ->
+    [ begin
+          case (ets:update_element(FileHandlesEts, Key, {2, close})
+                andalso Invoke) of
+              true  -> case dict:fetch(Ref, ClientRefs) of
+                           {_MsgOnDiskFun, undefined}   -> ok;
+                           {_MsgOnDiskFun, CloseFDsFun} -> ok = CloseFDsFun()
+                       end;
+              false -> ok
+          end
+      end || {{Ref, _File} = Key, open} <-
+                 ets:match_object(FileHandlesEts, {{'_', File}, open}) ],
     true.
 
-close_all_indicated(#client_msstate { file_handles_ets = FileHandlesEts } =
+safe_file_delete_fun(File, Dir, FileHandlesEts) ->
+    fun () -> safe_file_delete(File, Dir, FileHandlesEts) end.
+
+safe_file_delete(File, Dir, FileHandlesEts) ->
+    %% do not match on any value - it's the absence of the row that
+    %% indicates the client has really closed the file.
+    case ets:match_object(FileHandlesEts, {{'_', File}, '_'}, 1) of
+        {[_|_], _Cont} -> false;
+        _              -> ok = file:delete(
+                                 form_filename(Dir, filenum_to_name(File))),
+                          true
+    end.
+
+close_all_indicated(#client_msstate { file_handles_ets = FileHandlesEts,
+                                      client_ref       = Ref } =
                     CState) ->
-    Objs = ets:match_object(FileHandlesEts, {{self(), '_'}, close}),
-    lists:foldl(fun ({Key = {_Self, File}, close}, CStateM) ->
-                        true = ets:delete(FileHandlesEts, Key),
-                        close_handle(File, CStateM)
-                end, CState, Objs).
-
-close_all_handles(CState = #client_msstate { file_handles_ets = FileHandlesEts,
-                                             file_handle_cache = FHC }) ->
-    Self = self(),
+    Objs = ets:match_object(FileHandlesEts, {{Ref, '_'}, close}),
+    {ok, lists:foldl(fun ({Key = {_Ref, File}, close}, CStateM) ->
+                             true = ets:delete(FileHandlesEts, Key),
+                             close_handle(File, CStateM)
+                     end, CState, Objs)}.
+
+close_all_handles(CState = #client_msstate { file_handles_ets  = FileHandlesEts,
+                                             file_handle_cache = FHC,
+                                             client_ref        = Ref }) ->
     ok = dict:fold(fun (File, Hdl, ok) ->
-                           true = ets:delete(FileHandlesEts, {Self, File}),
+                           true = ets:delete(FileHandlesEts, {Ref, File}),
                            file_handle_cache:close(Hdl)
                    end, ok, FHC),
     CState #client_msstate { file_handle_cache = dict:new() };
@@ -1180,16 +1388,16 @@ index_delete_by_file(File, #msstate { index_module = Index,
 %%----------------------------------------------------------------------------
 
 recover_index_and_client_refs(IndexModule, _Recover, undefined, Dir, _Server) ->
-    {false, IndexModule:new(Dir), sets:new()};
+    {false, IndexModule:new(Dir), []};
 recover_index_and_client_refs(IndexModule, false, _ClientRefs, Dir, Server) ->
     rabbit_log:warning("~w: rebuilding indices from scratch~n", [Server]),
-    {false, IndexModule:new(Dir), sets:new()};
+    {false, IndexModule:new(Dir), []};
 recover_index_and_client_refs(IndexModule, true, ClientRefs, Dir, Server) ->
     Fresh = fun (ErrorMsg, ErrorArgs) ->
                     rabbit_log:warning("~w: " ++ ErrorMsg ++ "~n"
                                        "rebuilding indices from scratch~n",
                                        [Server | ErrorArgs]),
-                    {false, IndexModule:new(Dir), sets:new()}
+                    {false, IndexModule:new(Dir), []}
             end,
     case read_recovery_terms(Dir) of
         {false, Error} ->
@@ -1201,8 +1409,7 @@ recover_index_and_client_refs(IndexModule, true, ClientRefs, Dir, Server) ->
                   andalso IndexModule =:= RecIndexModule) of
                 true  -> case IndexModule:recover(Dir) of
                              {ok, IndexState1} ->
-                                 {true, IndexState1,
-                                  sets:from_list(ClientRefs)};
+                                 {true, IndexState1, ClientRefs};
                              {error, Error} ->
                                  Fresh("failed to recover index: ~p", [Error])
                          end;
@@ -1543,7 +1750,8 @@ delete_file_if_empty(File, State = #msstate {
 
 cleanup_after_file_deletion(File,
                             #msstate { file_handles_ets = FileHandlesEts,
-                                       file_summary_ets = FileSummaryEts }) ->
+                                       file_summary_ets = FileSummaryEts,
+                                       clients          = Clients }) ->
     %% Ensure that any clients that have open fhs to the file close
     %% them before using them again. This has to be done here (given
     %% it's done in the msg_store, and not the gc), and not when
@@ -1551,7 +1759,7 @@ cleanup_after_file_deletion(File,
     %% the client could find the close, and close and reopen the fh,
     %% whilst the GC is waiting for readers to disappear, before it's
     %% actually done the GC.
-    true = mark_handle_to_close(FileHandlesEts, File),
+    true = mark_handle_to_close(Clients, FileHandlesEts, File, true),
     [#file_summary { left    = Left,
                      right   = Right,
                      locked  = true,
@@ -1580,6 +1788,7 @@ has_readers(File, #gc_state { file_summary_ets = FileSummaryEts }) ->
 
 combine_files(Source, Destination,
               State = #gc_state { file_summary_ets = FileSummaryEts,
+                                  file_handles_ets = FileHandlesEts,
                                   dir              = Dir,
                                   msg_store        = Server }) ->
     [#file_summary {
@@ -1640,7 +1849,7 @@ combine_files(Source, Destination,
                        SourceHdl, DestinationHdl, Destination, State),
     %% tidy up
     ok = file_handle_cache:close(DestinationHdl),
-    ok = file_handle_cache:delete(SourceHdl),
+    ok = file_handle_cache:close(SourceHdl),
 
     %% don't update dest.right, because it could be changing at the
     %% same time
@@ -1650,9 +1859,11 @@ combine_files(Source, Destination,
               {#file_summary.file_size,        TotalValidData}]),
 
     Reclaimed = SourceFileSize + DestinationFileSize - TotalValidData,
-    gen_server2:cast(Server, {combine_files, Source, Destination, Reclaimed}).
+    gen_server2:cast(Server, {combine_files, Source, Destination, Reclaimed}),
+    safe_file_delete_fun(Source, Dir, FileHandlesEts).
 
 delete_file(File, State = #gc_state { file_summary_ets = FileSummaryEts,
+                                      file_handles_ets = FileHandlesEts,
                                       dir              = Dir,
                                       msg_store        = Server }) ->
     [#file_summary { valid_total_size = 0,
@@ -1660,8 +1871,8 @@ delete_file(File, State = #gc_state { file_summary_ets = FileSummaryEts,
                      file_size        = FileSize,
                      readers          = 0 }] = ets:lookup(FileSummaryEts, File),
     {[], 0} = load_and_vacuum_message_file(File, State),
-    ok = file:delete(form_filename(Dir, filenum_to_name(File))),
-    gen_server2:cast(Server, {delete_file, File, FileSize}).
+    gen_server2:cast(Server, {delete_file, File, FileSize}),
+    safe_file_delete_fun(File, Dir, FileHandlesEts).
 
 load_and_vacuum_message_file(File, #gc_state { dir          = Dir,
                                                index_module = Index,
diff --git a/src/rabbit_msg_store_ets_index.erl b/src/rabbit_msg_store_ets_index.erl
index 96be674c..077400d6 100644
--- a/src/rabbit_msg_store_ets_index.erl
+++ b/src/rabbit_msg_store_ets_index.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_msg_store_ets_index).
diff --git a/src/rabbit_msg_store_gc.erl b/src/rabbit_msg_store_gc.erl
index cd9fd497..77f1f04e 100644
--- a/src/rabbit_msg_store_gc.erl
+++ b/src/rabbit_msg_store_gc.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_msg_store_gc).
@@ -42,6 +27,7 @@
 
 -record(state,
         { pending_no_readers,
+          on_action,
           msg_store_state
         }).
 
@@ -89,6 +75,7 @@ init([MsgStoreState]) ->
     ok = file_handle_cache:register_callback(?MODULE, set_maximum_since_use,
                                              [self()]),
     {ok, #state { pending_no_readers = dict:new(),
+                  on_action          = [],
                   msg_store_state    = MsgStoreState }, hibernate,
      {backoff, ?HIBERNATE_AFTER_MIN, ?HIBERNATE_AFTER_MIN, ?DESIRED_HIBERNATE}}.
 
@@ -131,11 +118,15 @@ code_change(_OldVsn, State, _Extra) ->
 
 attempt_action(Action, Files,
                State = #state { pending_no_readers = Pending,
+                                on_action          = Thunks,
                                 msg_store_state    = MsgStoreState }) ->
     case [File || File <- Files,
                   rabbit_msg_store:has_readers(File, MsgStoreState)] of
-        []         -> do_action(Action, Files, MsgStoreState),
-                      State;
+        []         -> State #state {
+                        on_action = lists:filter(
+                                      fun (Thunk) -> not Thunk() end,
+                                      [do_action(Action, Files, MsgStoreState) |
+                                       Thunks]) };
         [File | _] -> Pending1 = dict:store(File, {Action, Files}, Pending),
                       State #state { pending_no_readers = Pending1 }
     end.
diff --git a/src/rabbit_msg_store_index.erl b/src/rabbit_msg_store_index.erl
index 0ed64a9d..ef8b7cdf 100644
--- a/src/rabbit_msg_store_index.erl
+++ b/src/rabbit_msg_store_index.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_msg_store_index).
diff --git a/src/rabbit_multi.erl b/src/rabbit_multi.erl
index 0030216e..7c07c4fe 100644
--- a/src/rabbit_multi.erl
+++ b/src/rabbit_multi.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_multi).
diff --git a/src/rabbit_net.erl b/src/rabbit_net.erl
index 0940dce2..c500548a 100644
--- a/src/rabbit_net.erl
+++ b/src/rabbit_net.erl
@@ -1,40 +1,25 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_net).
 -include("rabbit.hrl").
 
--export([async_recv/3, close/1, controlling_process/2,
-        getstat/2, peername/1, peercert/1, port_command/2,
-        send/2, sockname/1, is_ssl/1]).
+-export([is_ssl/1, ssl_info/1, controlling_process/2, getstat/2,
+         async_recv/3, port_command/2, send/2, close/1,
+         sockname/1, peername/1, peercert/1]).
 
 %%---------------------------------------------------------------------------
 
@@ -49,26 +34,28 @@
 -type(ok_or_any_error() :: rabbit_types:ok_or_error(any())).
 -type(socket() :: port() | #ssl_socket{}).
 
+-spec(is_ssl/1 :: (socket()) -> boolean()).
+-spec(ssl_info/1 :: (socket())
+                    -> 'nossl' | ok_val_or_error(
+                                   {atom(), {atom(), atom(), atom()}})).
+-spec(controlling_process/2 :: (socket(), pid()) -> ok_or_any_error()).
+-spec(getstat/2 ::
+        (socket(), [stat_option()])
+        -> ok_val_or_error([{stat_option(), integer()}])).
 -spec(async_recv/3 ::
         (socket(), integer(), timeout()) -> rabbit_types:ok(any())).
--spec(close/1 :: (socket()) -> ok_or_any_error()).
--spec(controlling_process/2 :: (socket(), pid()) -> ok_or_any_error()).
 -spec(port_command/2 :: (socket(), iolist()) -> 'true').
--spec(send/2 ::
-        (socket(), binary() | iolist()) -> ok_or_any_error()).
+-spec(send/2 :: (socket(), binary() | iolist()) -> ok_or_any_error()).
+-spec(close/1 :: (socket()) -> ok_or_any_error()).
+-spec(sockname/1 ::
+        (socket())
+        -> ok_val_or_error({inet:ip_address(), rabbit_networking:ip_port()})).
 -spec(peername/1 ::
         (socket())
         -> ok_val_or_error({inet:ip_address(), rabbit_networking:ip_port()})).
 -spec(peercert/1 ::
         (socket())
         -> 'nossl' | ok_val_or_error(rabbit_ssl:certificate())).
--spec(sockname/1 ::
-        (socket())
-        -> ok_val_or_error({inet:ip_address(), rabbit_networking:ip_port()})).
--spec(is_ssl/1 :: (socket()) -> boolean()).
--spec(getstat/2 ::
-        (socket(), [stat_option()])
-        -> ok_val_or_error([{stat_option(), integer()}])).
 
 -endif.
 
@@ -76,24 +63,12 @@
 
 -define(IS_SSL(Sock), is_record(Sock, ssl_socket)).
 
-async_recv(Sock, Length, Timeout) when ?IS_SSL(Sock) ->
-    Pid = self(),
-    Ref = make_ref(),
-
-    spawn(fun () -> Pid ! {inet_async, Sock, Ref,
-                           ssl:recv(Sock#ssl_socket.ssl, Length, Timeout)}
-          end),
+is_ssl(Sock) -> ?IS_SSL(Sock).
 
-    {ok, Ref};
-async_recv(Sock, Length, infinity) when is_port(Sock) ->
-    prim_inet:async_recv(Sock, Length, -1);
-async_recv(Sock, Length, Timeout) when is_port(Sock) ->
-    prim_inet:async_recv(Sock, Length, Timeout).
-
-close(Sock) when ?IS_SSL(Sock) ->
-    ssl:close(Sock#ssl_socket.ssl);
-close(Sock) when is_port(Sock) ->
-    gen_tcp:close(Sock).
+ssl_info(Sock) when ?IS_SSL(Sock) ->
+    ssl:connection_info(Sock#ssl_socket.ssl);
+ssl_info(_Sock) ->
+    nossl.
 
 controlling_process(Sock, Pid) when ?IS_SSL(Sock) ->
     ssl:controlling_process(Sock#ssl_socket.ssl, Pid);
@@ -105,15 +80,19 @@ getstat(Sock, Stats) when ?IS_SSL(Sock) ->
 getstat(Sock, Stats) when is_port(Sock) ->
     inet:getstat(Sock, Stats).
 
-peername(Sock) when ?IS_SSL(Sock) ->
-    ssl:peername(Sock#ssl_socket.ssl);
-peername(Sock) when is_port(Sock) ->
-    inet:peername(Sock).
+async_recv(Sock, Length, Timeout) when ?IS_SSL(Sock) ->
+    Pid = self(),
+    Ref = make_ref(),
 
-peercert(Sock) when ?IS_SSL(Sock) ->
-    ssl:peercert(Sock#ssl_socket.ssl);
-peercert(Sock) when is_port(Sock) ->
-    nossl.
+    spawn(fun () -> Pid ! {inet_async, Sock, Ref,
+                           ssl:recv(Sock#ssl_socket.ssl, Length, Timeout)}
+          end),
+
+    {ok, Ref};
+async_recv(Sock, Length, infinity) when is_port(Sock) ->
+    prim_inet:async_recv(Sock, Length, -1);
+async_recv(Sock, Length, Timeout) when is_port(Sock) ->
+    prim_inet:async_recv(Sock, Length, Timeout).
 
 port_command(Sock, Data) when ?IS_SSL(Sock) ->
     case ssl:send(Sock#ssl_socket.ssl, Data) of
@@ -124,16 +103,17 @@ port_command(Sock, Data) when ?IS_SSL(Sock) ->
 port_command(Sock, Data) when is_port(Sock) ->
     erlang:port_command(Sock, Data).
 
-send(Sock, Data) when ?IS_SSL(Sock) ->
-    ssl:send(Sock#ssl_socket.ssl, Data);
-send(Sock, Data) when is_port(Sock) ->
-    gen_tcp:send(Sock, Data).
+send(Sock, Data) when ?IS_SSL(Sock) -> ssl:send(Sock#ssl_socket.ssl, Data);
+send(Sock, Data) when is_port(Sock) -> gen_tcp:send(Sock, Data).
+
+close(Sock)      when ?IS_SSL(Sock) -> ssl:close(Sock#ssl_socket.ssl);
+close(Sock)      when is_port(Sock) -> gen_tcp:close(Sock).
 
+sockname(Sock)   when ?IS_SSL(Sock) -> ssl:sockname(Sock#ssl_socket.ssl);
+sockname(Sock)   when is_port(Sock) -> inet:sockname(Sock).
 
-sockname(Sock) when ?IS_SSL(Sock) ->
-    ssl:sockname(Sock#ssl_socket.ssl);
-sockname(Sock) when is_port(Sock) ->
-    inet:sockname(Sock).
+peername(Sock)   when ?IS_SSL(Sock) -> ssl:peername(Sock#ssl_socket.ssl);
+peername(Sock)   when is_port(Sock) -> inet:peername(Sock).
 
-is_ssl(Sock) ->
-    ?IS_SSL(Sock).
+peercert(Sock)   when ?IS_SSL(Sock) -> ssl:peercert(Sock#ssl_socket.ssl);
+peercert(Sock)   when is_port(Sock) -> nossl.
diff --git a/src/rabbit_networking.erl b/src/rabbit_networking.erl
index 1c542ffe..9788c922 100644
--- a/src/rabbit_networking.erl
+++ b/src/rabbit_networking.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_networking).
@@ -246,8 +231,9 @@ start_ssl_client(SslOpts, Sock) ->
 
 connections() ->
     [rabbit_connection_sup:reader(ConnSup) ||
+        Node <- rabbit_mnesia:running_clustered_nodes(),
         {_, ConnSup, supervisor, _}
-            <- supervisor:which_children(rabbit_tcp_client_sup)].
+            <- supervisor:which_children({rabbit_tcp_client_sup, Node})].
 
 connection_info_keys() -> rabbit_reader:info_keys().
 
diff --git a/src/rabbit_node_monitor.erl b/src/rabbit_node_monitor.erl
index f3013a16..e4bc1cdc 100644
--- a/src/rabbit_node_monitor.erl
+++ b/src/rabbit_node_monitor.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_node_monitor).
diff --git a/src/rabbit_persister.erl b/src/rabbit_persister.erl
deleted file mode 100644
index 11056c8e..00000000
--- a/src/rabbit_persister.erl
+++ /dev/null
@@ -1,496 +0,0 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
-%%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
-%%
-%%   The Original Code is RabbitMQ.
-%%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
-%%
-
--module(rabbit_persister).
-
--behaviour(gen_server).
-
--export([start_link/1]).
-
--export([init/1, handle_call/3, handle_cast/2, handle_info/2,
-         terminate/2, code_change/3]).
-
--export([transaction/1, extend_transaction/2, dirty_work/1,
-         commit_transaction/1, rollback_transaction/1,
-         force_snapshot/0, queue_content/1]).
-
--include("rabbit.hrl").
-
--define(SERVER, ?MODULE).
-
--define(LOG_BUNDLE_DELAY, 5).
--define(COMPLETE_BUNDLE_DELAY, 2).
-
--define(PERSISTER_LOG_FORMAT_VERSION, {2, 6}).
-
--record(pstate, {log_handle, entry_count, deadline,
-                 pending_logs, pending_replies, snapshot}).
-
-%% two tables for efficient persistency
-%% one maps a key to a message
-%% the other maps a key to one or more queues.
-%% The aim is to reduce the overload of storing a message multiple times
-%% when it appears in several queues.
--record(psnapshot, {transactions, messages, queues, next_seq_id}).
-
-%%----------------------------------------------------------------------------
-
--ifdef(use_specs).
-
--type(pkey() :: rabbit_guid:guid()).
--type(pmsg() :: {rabbit_amqqueue:name(), pkey()}).
-
--type(work_item() ::
-      {publish,
-       rabbit_types:message(), rabbit_types:message_properties(), pmsg()} |
-      {deliver, pmsg()} |
-      {ack, pmsg()}).
-
--spec(start_link/1 :: ([rabbit_amqqueue:name()]) ->
-                           rabbit_types:ok_pid_or_error()).
--spec(transaction/1 :: ([work_item()]) -> 'ok').
--spec(extend_transaction/2 ::
-        ({rabbit_types:txn(), rabbit_amqqueue:name()}, [work_item()])
-        -> 'ok').
--spec(dirty_work/1 :: ([work_item()]) -> 'ok').
--spec(commit_transaction/1 ::
-        ({rabbit_types:txn(), rabbit_amqqueue:name()}) -> 'ok').
--spec(rollback_transaction/1 ::
-        ({rabbit_types:txn(), rabbit_amqqueue:name()}) -> 'ok').
--spec(force_snapshot/0 :: () -> 'ok').
--spec(queue_content/1 ::
-        (rabbit_amqqueue:name()) -> [{rabbit_types:message(), boolean()}]).
-
--endif.
-
-%%----------------------------------------------------------------------------
-
-start_link(DurableQueues) ->
-    gen_server:start_link({local, ?SERVER}, ?MODULE, [DurableQueues], []).
-
-transaction(MessageList) ->
-    ?LOGDEBUG("transaction ~p~n", [MessageList]),
-    TxnKey = rabbit_guid:guid(),
-    gen_server:call(?SERVER, {transaction, TxnKey, MessageList}, infinity).
-
-extend_transaction(TxnKey, MessageList) ->
-    ?LOGDEBUG("extend_transaction ~p ~p~n", [TxnKey, MessageList]),
-    gen_server:cast(?SERVER, {extend_transaction, TxnKey, MessageList}).
-
-dirty_work(MessageList) ->
-    ?LOGDEBUG("dirty_work ~p~n", [MessageList]),
-    gen_server:cast(?SERVER, {dirty_work, MessageList}).
-
-commit_transaction(TxnKey) ->
-    ?LOGDEBUG("commit_transaction ~p~n", [TxnKey]),
-    gen_server:call(?SERVER, {commit_transaction, TxnKey}, infinity).
-
-rollback_transaction(TxnKey) ->
-    ?LOGDEBUG("rollback_transaction ~p~n", [TxnKey]),
-    gen_server:cast(?SERVER, {rollback_transaction, TxnKey}).
-
-force_snapshot() ->
-    gen_server:call(?SERVER, force_snapshot, infinity).
-
-queue_content(QName) ->
-    gen_server:call(?SERVER, {queue_content, QName}, infinity).
-
-%%--------------------------------------------------------------------
-
-init([DurableQueues]) ->
-    process_flag(trap_exit, true),
-    FileName = base_filename(),
-    ok = filelib:ensure_dir(FileName),
-    Snapshot = #psnapshot{transactions = dict:new(),
-                          messages     = ets:new(messages, []),
-                          queues       = ets:new(queues, [ordered_set]),
-                          next_seq_id  = 0},
-    LogHandle =
-        case disk_log:open([{name, rabbit_persister},
-                            {head, current_snapshot(Snapshot)},
-                            {file, FileName}]) of
-            {ok, LH} -> LH;
-            {repaired, LH, {recovered, Recovered}, {badbytes, Bad}} ->
-                WarningFun = if
-                                 Bad > 0 -> fun rabbit_log:warning/2;
-                                 true    -> fun rabbit_log:info/2
-                             end,
-                WarningFun("Repaired persister log - ~p recovered, ~p bad~n",
-                           [Recovered, Bad]),
-                LH
-        end,
-    {Res, NewSnapshot} =
-        internal_load_snapshot(LogHandle, DurableQueues, Snapshot),
-    case Res of
-        ok ->
-            ok = take_snapshot(LogHandle, NewSnapshot);
-        {error, Reason} ->
-            rabbit_log:error("Failed to load persister log: ~p~n", [Reason]),
-            ok = take_snapshot_and_save_old(LogHandle, NewSnapshot)
-    end,
-    State = #pstate{log_handle        = LogHandle,
-                    entry_count       = 0,
-                    deadline          = infinity,
-                    pending_logs      = [],
-                    pending_replies   = [],
-                    snapshot          = NewSnapshot},
-    {ok, State}.
-
-handle_call({transaction, Key, MessageList}, From, State) ->
-    NewState = internal_extend(Key, MessageList, State),
-    do_noreply(internal_commit(From, Key, NewState));
-handle_call({commit_transaction, TxnKey}, From, State) ->
-    do_noreply(internal_commit(From, TxnKey, State));
-handle_call(force_snapshot, _From, State) ->
-    do_reply(ok, flush(true, State));
-handle_call({queue_content, QName}, _From,
-            State = #pstate{snapshot = #psnapshot{messages = Messages,
-                                                  queues   = Queues}}) ->
-    MatchSpec= [{{{QName,'$1'}, '$2', '$3', '$4'}, [], 
-                 [{{'$4', '$1', '$2', '$3'}}]}],
-    do_reply([{ets:lookup_element(Messages, K, 2), MP, D} ||
-                 {_, K, D, MP} <- lists:sort(ets:select(Queues, MatchSpec))],
-             State);
-handle_call(_Request, _From, State) ->
-    {noreply, State}.
-
-handle_cast({rollback_transaction, TxnKey}, State) ->
-    do_noreply(internal_rollback(TxnKey, State));
-handle_cast({dirty_work, MessageList}, State) ->
-    do_noreply(internal_dirty_work(MessageList, State));
-handle_cast({extend_transaction, TxnKey, MessageList}, State) ->
-    do_noreply(internal_extend(TxnKey, MessageList, State));
-handle_cast(_Msg, State) ->
-    {noreply, State}.
-
-handle_info(timeout, State = #pstate{deadline = infinity}) ->
-    State1 = flush(true, State),
-    {noreply, State1, hibernate};
-handle_info(timeout, State) ->
-    do_noreply(flush(State));
-handle_info(_Info, State) ->
-    {noreply, State}.
-
-terminate(_Reason, State = #pstate{log_handle = LogHandle}) ->
-    flush(State),
-    disk_log:close(LogHandle),
-    ok.
-
-code_change(_OldVsn, State, _Extra) ->
-    {ok, flush(State)}.
-
-%%--------------------------------------------------------------------
-
-internal_extend(Key, MessageList, State) ->
-    log_work(fun (ML) -> {extend_transaction, Key, ML} end,
-             MessageList, State).
-
-internal_dirty_work(MessageList, State) ->
-    log_work(fun (ML) -> {dirty_work, ML} end,
-             MessageList, State).
-
-internal_commit(From, Key, State = #pstate{snapshot = Snapshot}) ->
-    Unit = {commit_transaction, Key},
-    NewSnapshot = internal_integrate1(Unit, Snapshot),
-    complete(From, Unit, State#pstate{snapshot = NewSnapshot}).
-
-internal_rollback(Key, State = #pstate{snapshot = Snapshot}) ->
-    Unit = {rollback_transaction, Key},
-    NewSnapshot = internal_integrate1(Unit, Snapshot),
-    log(State#pstate{snapshot = NewSnapshot}, Unit).
-
-complete(From, Item, State = #pstate{deadline = ExistingDeadline,
-                                     pending_logs = Logs,
-                                     pending_replies = Waiting}) ->
-    State#pstate{deadline = compute_deadline(
-                              ?COMPLETE_BUNDLE_DELAY, ExistingDeadline),
-                 pending_logs = [Item | Logs],
-                 pending_replies = [From | Waiting]}.
-
-%% This is made to limit disk usage by writing messages only once onto
-%% disk.  We keep a table associating pkeys to messages, and provided
-%% the list of messages to output is left to right, we can guarantee
-%% that pkeys will be a backreference to a message in memory when a
-%% "tied" is met.
-log_work(CreateWorkUnit, MessageList,
-         State = #pstate{
-           snapshot = Snapshot = #psnapshot{messages = Messages}}) ->
-    Unit = CreateWorkUnit(
-             rabbit_misc:map_in_order(
-               fun (M = {publish, Message, MsgProps, QK = {_QName, PKey}}) ->
-                       case ets:lookup(Messages, PKey) of
-                           [_] -> {tied, MsgProps, QK};
-                           []  -> ets:insert(Messages, {PKey, Message}),
-                                  M
-                       end;
-                  (M) -> M
-               end,
-               MessageList)),
-    NewSnapshot = internal_integrate1(Unit, Snapshot),
-    log(State#pstate{snapshot = NewSnapshot}, Unit).
-
-log(State = #pstate{deadline = ExistingDeadline, pending_logs = Logs},
-    Message) ->
-    State#pstate{deadline = compute_deadline(?LOG_BUNDLE_DELAY,
-                                             ExistingDeadline),
-                 pending_logs = [Message | Logs]}.
-
-base_filename() ->
-    rabbit_mnesia:dir() ++ "/rabbit_persister.LOG".
-
-take_snapshot(LogHandle, OldFileName, Snapshot) ->
-    ok = disk_log:sync(LogHandle),
-    %% current_snapshot is the Head (ie. first thing logged)
-    ok = disk_log:reopen(LogHandle, OldFileName, current_snapshot(Snapshot)).
-
-take_snapshot(LogHandle, Snapshot) ->
-    OldFileName = lists:flatten(base_filename() ++ ".previous"),
-    file:delete(OldFileName),
-    rabbit_log:info("Rolling persister log to ~p~n", [OldFileName]),
-    ok = take_snapshot(LogHandle, OldFileName, Snapshot).
-
-take_snapshot_and_save_old(LogHandle, Snapshot) ->
-    {MegaSecs, Secs, MicroSecs} = erlang:now(),
-    Timestamp = MegaSecs * 1000000 + Secs * 1000 + MicroSecs,
-    OldFileName = lists:flatten(io_lib:format("~s.saved.~p",
-                                              [base_filename(), Timestamp])),
-    rabbit_log:info("Saving persister log in ~p~n", [OldFileName]),
-    ok = take_snapshot(LogHandle, OldFileName, Snapshot).
-
-maybe_take_snapshot(Force, State = #pstate{entry_count = EntryCount,
-                                           log_handle = LH,
-                                           snapshot = Snapshot}) ->
-    {ok, MaxWrapEntries} = application:get_env(persister_max_wrap_entries),
-    if
-        Force orelse EntryCount >= MaxWrapEntries ->
-            ok = take_snapshot(LH, Snapshot),
-            State#pstate{entry_count = 0};
-        true ->
-            State
-    end.
-
-later_ms(DeltaMilliSec) ->
-    {MegaSec, Sec, MicroSec} = now(),
-    %% Note: not normalised. Unimportant for this application.
-    {MegaSec, Sec, MicroSec + (DeltaMilliSec * 1000)}.
-
-%% Result = B - A, more or less
-time_diff({B1, B2, B3}, {A1, A2, A3}) ->
-    (B1 - A1) * 1000000 + (B2 - A2) + (B3 - A3) / 1000000.0 .
-
-compute_deadline(TimerDelay, infinity) ->
-    later_ms(TimerDelay);
-compute_deadline(_TimerDelay, ExistingDeadline) ->
-    ExistingDeadline.
-
-compute_timeout(infinity) ->
-    {ok, HibernateAfter} = application:get_env(persister_hibernate_after),
-    HibernateAfter;
-compute_timeout(Deadline) ->
-    DeltaMilliSec = time_diff(Deadline, now()) * 1000.0,
-    if
-        DeltaMilliSec =< 1 ->
-            0;
-        true ->
-            round(DeltaMilliSec)
-    end.
-
-do_noreply(State = #pstate{deadline = Deadline}) ->
-    {noreply, State, compute_timeout(Deadline)}.
-
-do_reply(Reply, State = #pstate{deadline = Deadline}) ->
-    {reply, Reply, State, compute_timeout(Deadline)}.
-
-flush(State) -> flush(false, State).
-
-flush(ForceSnapshot, State = #pstate{pending_logs = PendingLogs,
-                                     pending_replies = Waiting,
-                                     log_handle = LogHandle}) ->
-    State1 = if PendingLogs /= [] ->
-                     disk_log:alog(LogHandle, lists:reverse(PendingLogs)),
-                     State#pstate{entry_count = State#pstate.entry_count + 1};
-                true ->
-                     State
-             end,
-    State2 = maybe_take_snapshot(ForceSnapshot, State1),
-    if Waiting /= [] ->
-            ok = disk_log:sync(LogHandle),
-            lists:foreach(fun (From) -> gen_server:reply(From, ok) end,
-                          Waiting);
-       true ->
-            ok
-    end,
-    State2#pstate{deadline = infinity,
-                  pending_logs = [],
-                  pending_replies = []}.
-
-current_snapshot(_Snapshot = #psnapshot{transactions = Ts,
-                                        messages     = Messages,
-                                        queues       = Queues,
-                                        next_seq_id  = NextSeqId}) ->
-    %% Avoid infinite growth of the table by removing messages not
-    %% bound to a queue anymore
-    PKeys = ets:foldl(fun ({{_QName, PKey}, _Delivered, 
-                            _MsgProps, _SeqId}, S) ->
-                              sets:add_element(PKey, S)
-                      end, sets:new(), Queues),
-    prune_table(Messages, fun (Key) -> sets:is_element(Key, PKeys) end),
-    InnerSnapshot = {{txns, Ts},
-                     {messages, ets:tab2list(Messages)},
-                     {queues, ets:tab2list(Queues)},
-                     {next_seq_id, NextSeqId}},
-    ?LOGDEBUG("Inner snapshot: ~p~n", [InnerSnapshot]),
-    {persist_snapshot, {vsn, ?PERSISTER_LOG_FORMAT_VERSION},
-     term_to_binary(InnerSnapshot)}.
-
-prune_table(Tab, Pred) ->
-    true = ets:safe_fixtable(Tab, true),
-    ok = prune_table(Tab, Pred, ets:first(Tab)),
-    true = ets:safe_fixtable(Tab, false).
-
-prune_table(_Tab, _Pred, '$end_of_table') -> ok;
-prune_table(Tab, Pred, Key) ->
-    case Pred(Key) of
-        true  -> ok;
-        false -> ets:delete(Tab, Key)
-    end,
-    prune_table(Tab, Pred, ets:next(Tab, Key)).
-
-internal_load_snapshot(LogHandle,
-                       DurableQueues,
-                       Snapshot = #psnapshot{messages = Messages,
-                                             queues = Queues}) ->
-    {K, [Loaded_Snapshot | Items]} = disk_log:chunk(LogHandle, start),
-    case check_version(Loaded_Snapshot) of
-        {ok, StateBin} ->
-            {{txns, Ts}, {messages, Ms}, {queues, Qs},
-             {next_seq_id, NextSeqId}} = binary_to_term(StateBin),
-            true = ets:insert(Messages, Ms),
-            true = ets:insert(Queues, Qs),
-            Snapshot1 = replay(Items, LogHandle, K,
-                               Snapshot#psnapshot{
-                                 transactions = Ts,
-                                 next_seq_id = NextSeqId}),
-            %% Remove all entries for queues that no longer exist.
-            %% Note that the 'messages' table is pruned when the next
-            %% snapshot is taken.
-            DurableQueuesSet = sets:from_list(DurableQueues),
-            prune_table(Snapshot1#psnapshot.queues,
-                        fun ({QName, _PKey}) ->
-                                sets:is_element(QName, DurableQueuesSet)
-                        end),
-            %% uncompleted transactions are discarded - this is TRTTD
-            %% since we only get into this code on node restart, so
-            %% any uncompleted transactions will have been aborted.
-            {ok, Snapshot1#psnapshot{transactions = dict:new()}};
-        {error, Reason} -> {{error, Reason}, Snapshot}
-    end.
-
-check_version({persist_snapshot, {vsn, ?PERSISTER_LOG_FORMAT_VERSION},
-               StateBin}) ->
-    {ok, StateBin};
-check_version({persist_snapshot, {vsn, Vsn}, _StateBin}) ->
-    {error, {unsupported_persister_log_format, Vsn}};
-check_version(_Other) ->
-    {error, unrecognised_persister_log_format}.
-
-replay([], LogHandle, K, Snapshot) ->
-    case disk_log:chunk(LogHandle, K) of
-        {K1, Items} ->
-            replay(Items, LogHandle, K1, Snapshot);
-        {K1, Items, Badbytes} ->
-            rabbit_log:warning("~p bad bytes recovering persister log~n",
-                               [Badbytes]),
-            replay(Items, LogHandle, K1, Snapshot);
-        eof -> Snapshot
-    end;
-replay([Item | Items], LogHandle, K, Snapshot) ->
-    NewSnapshot = internal_integrate_messages(Item, Snapshot),
-    replay(Items, LogHandle, K, NewSnapshot).
-
-internal_integrate_messages(Items, Snapshot) ->
-    lists:foldl(fun (Item, Snap) -> internal_integrate1(Item, Snap) end,
-                Snapshot, Items).
-
-internal_integrate1({extend_transaction, Key, MessageList},
-                    Snapshot = #psnapshot {transactions = Transactions}) ->
-    Snapshot#psnapshot{transactions = rabbit_misc:dict_cons(Key, MessageList,
-                                                            Transactions)};
-internal_integrate1({rollback_transaction, Key},
-                    Snapshot = #psnapshot{transactions = Transactions}) ->
-    Snapshot#psnapshot{transactions = dict:erase(Key, Transactions)};
-internal_integrate1({commit_transaction, Key},
-                    Snapshot = #psnapshot{transactions = Transactions,
-                                          messages     = Messages,
-                                          queues       = Queues,
-                                          next_seq_id  = SeqId}) ->
-    case dict:find(Key, Transactions) of
-        {ok, MessageLists} ->
-            ?LOGDEBUG("persist committing txn ~p~n", [Key]),
-            NextSeqId =
-                lists:foldr(
-                  fun (ML, SeqIdN) ->
-                          perform_work(ML, Messages, Queues, SeqIdN) end,
-                  SeqId, MessageLists),
-            Snapshot#psnapshot{transactions = dict:erase(Key, Transactions),
-                               next_seq_id = NextSeqId};
-        error ->
-            Snapshot
-    end;
-internal_integrate1({dirty_work, MessageList},
-                    Snapshot = #psnapshot{messages    = Messages,
-                                          queues      = Queues,
-                                          next_seq_id = SeqId}) ->
-    Snapshot#psnapshot{next_seq_id = perform_work(MessageList, Messages,
-                                                  Queues, SeqId)}.
-
-perform_work(MessageList, Messages, Queues, SeqId) ->
-    lists:foldl(fun (Item, NextSeqId) ->
-                        perform_work_item(Item, Messages, Queues, NextSeqId)
-                end, SeqId, MessageList).
-
-perform_work_item({publish, Message, MsgProps, QK = {_QName, PKey}},
-                  Messages, Queues, NextSeqId) ->
-    true = ets:insert(Messages, {PKey, Message}),
-    true = ets:insert(Queues, {QK, false, MsgProps, NextSeqId}),
-    NextSeqId + 1;
-
-perform_work_item({tied, MsgProps, QK}, _Messages, Queues, NextSeqId) ->
-    true = ets:insert(Queues, {QK, false, MsgProps, NextSeqId}),
-    NextSeqId + 1;
-
-perform_work_item({deliver, QK}, _Messages, Queues, NextSeqId) ->
-    true = ets:update_element(Queues, QK, {2, true}),
-    NextSeqId;
-
-perform_work_item({ack, QK}, _Messages, Queues, NextSeqId) ->
-    true = ets:delete(Queues, QK),
-    NextSeqId.
diff --git a/src/rabbit_plugin_activator.erl b/src/rabbit_prelaunch.erl
index 072f297e..d9d92788 100644
--- a/src/rabbit_plugin_activator.erl
+++ b/src/rabbit_prelaunch.erl
@@ -1,39 +1,25 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
--module(rabbit_plugin_activator).
+-module(rabbit_prelaunch).
 
 -export([start/0, stop/0]).
 
 -define(BaseApps, [rabbit]).
+-define(ERROR_CODE, 1).
 
 %%----------------------------------------------------------------------------
 %% Specs
@@ -52,7 +38,7 @@ start() ->
     io:format("Activating RabbitMQ plugins ...~n"),
 
     %% Determine our various directories
-    [PluginDir, UnpackedPluginDir] = init:get_plain_arguments(),
+    [PluginDir, UnpackedPluginDir, NodeStr] = init:get_plain_arguments(),
     RootName = UnpackedPluginDir ++ "/rabbit",
 
     %% Unpack any .ez plugins
@@ -130,7 +116,10 @@ start() ->
     [io:format("* ~s-~s~n", [App, proplists:get_value(App, AppVersions)])
      || App <- PluginApps],
     io:nl(),
-    halt(),
+
+    ok = duplicate_node_check(NodeStr),
+
+    terminate(0),
     ok.
 
 stop() ->
@@ -251,6 +240,37 @@ process_entry(Entry = {apply,{application,start_boot,[rabbit,permanent]}}) ->
 process_entry(Entry) ->
     [Entry].
 
+%% Check whether a node with the same name is already running
+duplicate_node_check([]) ->
+    %% Ignore running node while installing windows service
+    ok;
+duplicate_node_check(NodeStr) ->
+    Node = rabbit_misc:makenode(NodeStr),
+    {NodeName, NodeHost} = rabbit_misc:nodeparts(Node),
+    case net_adm:names(NodeHost) of
+        {ok, NamePorts}  ->
+            case proplists:is_defined(NodeName, NamePorts) of
+                     true -> io:format("node with name ~p "
+                                       "already running on ~p~n",
+                                       [NodeName, NodeHost]),
+                             [io:format(Fmt ++ "~n", Args) ||
+                              {Fmt, Args} <- rabbit_control:diagnostics(Node)],
+                             terminate(?ERROR_CODE);
+                     false -> ok
+            end;
+        {error, EpmdReason} -> terminate("unexpected epmd error: ~p~n",
+                                         [EpmdReason])
+    end.
+
 terminate(Fmt, Args) ->
     io:format("ERROR: " ++ Fmt ++ "~n", Args),
-    halt(1).
+    terminate(?ERROR_CODE).
+
+terminate(Status) ->
+    case os:type() of
+        {unix,  _} -> halt(Status);
+        {win32, _} -> init:stop(Status),
+                      receive
+                      after infinity -> ok
+                      end
+    end.
diff --git a/src/rabbit_queue_collector.erl b/src/rabbit_queue_collector.erl
index 6ac402c8..9b45e798 100644
--- a/src/rabbit_queue_collector.erl
+++ b/src/rabbit_queue_collector.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_queue_collector).
diff --git a/src/rabbit_queue_index.erl b/src/rabbit_queue_index.erl
index 248c1fbc..76b1136f 100644
--- a/src/rabbit_queue_index.erl
+++ b/src/rabbit_queue_index.erl
@@ -1,39 +1,24 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_queue_index).
 
--export([init/1, shutdown_terms/1, recover/4,
+-export([init/2, shutdown_terms/1, recover/5,
          terminate/2, delete_and_terminate/1,
-         publish/5, deliver/2, ack/2, sync/2, flush/1, read/3,
+         publish/5, deliver/2, ack/2, sync/1, sync/2, flush/1, read/3,
          next_segment_boundary/1, bounds/1, recover/1]).
 
 -export([add_queue_ttl/0]).
@@ -174,7 +159,7 @@
 %%----------------------------------------------------------------------------
 
 -record(qistate, { dir, segments, journal_handle, dirty_count,
-                   max_journal_entries }).
+                   max_journal_entries, on_sync, unsynced_guids }).
 
 -record(segment, { num, path, journal_entries, unacked }).
 
@@ -195,21 +180,24 @@
                               })).
 -type(seq_id() :: integer()).
 -type(seg_dict() :: {dict(), [segment()]}).
+-type(on_sync_fun() :: fun ((gb_set()) -> ok)).
 -type(qistate() :: #qistate { dir                 :: file:filename(),
                               segments            :: 'undefined' | seg_dict(),
                               journal_handle      :: hdl(),
                               dirty_count         :: integer(),
-                              max_journal_entries :: non_neg_integer()
+                              max_journal_entries :: non_neg_integer(),
+                              on_sync             :: on_sync_fun(),
+                              unsynced_guids      :: [rabbit_guid:guid()]
                              }).
 -type(startup_fun_state() ::
-        {(fun ((A) -> 'finished' | {rabbit_guid:guid(), non_neg_integer(), A})),
+        {fun ((A) -> 'finished' | {rabbit_guid:guid(), non_neg_integer(), A}),
          A}).
 -type(shutdown_terms() :: [any()]).
 
--spec(init/1 :: (rabbit_amqqueue:name()) -> qistate()).
+-spec(init/2 :: (rabbit_amqqueue:name(), on_sync_fun()) -> qistate()).
 -spec(shutdown_terms/1 :: (rabbit_amqqueue:name()) -> shutdown_terms()).
--spec(recover/4 :: (rabbit_amqqueue:name(), shutdown_terms(), boolean(),
-                    fun ((rabbit_guid:guid()) -> boolean())) ->
+-spec(recover/5 :: (rabbit_amqqueue:name(), shutdown_terms(), boolean(),
+                    fun ((rabbit_guid:guid()) -> boolean()), on_sync_fun()) ->
              {'undefined' | non_neg_integer(), qistate()}).
 -spec(terminate/2 :: ([any()], qistate()) -> qistate()).
 -spec(delete_and_terminate/1 :: (qistate()) -> qistate()).
@@ -227,8 +215,8 @@
 -spec(next_segment_boundary/1 :: (seq_id()) -> seq_id()).
 -spec(bounds/1 :: (qistate()) ->
              {non_neg_integer(), non_neg_integer(), qistate()}).
--spec(recover/1 ::
-        ([rabbit_amqqueue:name()]) -> {[[any()]], startup_fun_state()}).
+-spec(recover/1 :: ([rabbit_amqqueue:name()]) ->
+                        {[[any()]], startup_fun_state()}).
 
 -spec(add_queue_ttl/0 :: () -> 'ok').
 
@@ -239,10 +227,10 @@
 %% public API
 %%----------------------------------------------------------------------------
 
-init(Name) ->
+init(Name, OnSyncFun) ->
     State = #qistate { dir = Dir } = blank_state(Name),
     false = filelib:is_file(Dir), %% is_file == is file or dir
-    State.
+    State #qistate { on_sync = OnSyncFun }.
 
 shutdown_terms(Name) ->
     #qistate { dir = Dir } = blank_state(Name),
@@ -251,13 +239,14 @@ shutdown_terms(Name) ->
         {ok, Terms1} -> Terms1
     end.
 
-recover(Name, Terms, MsgStoreRecovered, ContainsCheckFun) ->
+recover(Name, Terms, MsgStoreRecovered, ContainsCheckFun, OnSyncFun) ->
     State = #qistate { dir = Dir } = blank_state(Name),
+    State1 = State #qistate { on_sync = OnSyncFun },
     CleanShutdown = detect_clean_shutdown(Dir),
     case CleanShutdown andalso MsgStoreRecovered of
         true  -> RecoveredCounts = proplists:get_value(segments, Terms, []),
-                 init_clean(RecoveredCounts, State);
-        false -> init_dirty(CleanShutdown, ContainsCheckFun, State)
+                 init_clean(RecoveredCounts, State1);
+        false -> init_dirty(CleanShutdown, ContainsCheckFun, State1)
     end.
 
 terminate(Terms, State) ->
@@ -270,9 +259,13 @@ delete_and_terminate(State) ->
     ok = rabbit_misc:recursive_delete([Dir]),
     State1.
 
-publish(Guid, SeqId, MsgProps, IsPersistent, State) when is_binary(Guid) ->
+publish(Guid, SeqId, MsgProps, IsPersistent,
+        State = #qistate { unsynced_guids = UnsyncedGuids })
+  when is_binary(Guid) ->
     ?GUID_BYTES = size(Guid),
-    {JournalHdl, State1} = get_journal_handle(State),
+    {JournalHdl, State1} = get_journal_handle(
+                             State #qistate {
+                               unsynced_guids = [Guid | UnsyncedGuids] }),
     ok = file_handle_cache:append(
            JournalHdl, [<<(case IsPersistent of
                                true  -> ?PUB_PERSIST_JPREFIX;
@@ -289,11 +282,12 @@ deliver(SeqIds, State) ->
 ack(SeqIds, State) ->
     deliver_or_ack(ack, SeqIds, State).
 
-sync([], State) ->
-    State;
-sync(_SeqIds, State = #qistate { journal_handle = undefined }) ->
-    State;
-sync(_SeqIds, State = #qistate { journal_handle = JournalHdl }) ->
+%% This is only called when there are outstanding confirms and the
+%% queue is idle.
+sync(State = #qistate { unsynced_guids = Guids }) ->
+    sync_if([] =/= Guids, State).
+
+sync(SeqIds, State) ->
     %% The SeqIds here contains the SeqId of every publish and ack in
     %% the transaction. Ideally we should go through these seqids and
     %% only sync the journal if the pubs or acks appear in the
@@ -301,9 +295,8 @@ sync(_SeqIds, State = #qistate { journal_handle = JournalHdl }) ->
     %% the variable queue publishes and acks to the qi, and then
     %% syncs, all in one operation, there is no possibility of the
     %% seqids not being in the journal, provided the transaction isn't
-    %% emptied (handled above anyway).
-    ok = file_handle_cache:sync(JournalHdl),
-    State.
+    %% emptied (handled by sync_if anyway).
+    sync_if([] =/= SeqIds, State).
 
 flush(State = #qistate { dirty_count = 0 }) -> State;
 flush(State)                                -> flush_journal(State).
@@ -393,7 +386,9 @@ blank_state(QueueName) ->
                segments            = segments_new(),
                journal_handle      = undefined,
                dirty_count         = 0,
-               max_journal_entries = MaxJournal }.
+               max_journal_entries = MaxJournal,
+               on_sync             = fun (_) -> ok end,
+               unsynced_guids      = [] }.
 
 clean_file_name(Dir) -> filename:join(Dir, ?CLEAN_FILENAME).
 
@@ -625,7 +620,7 @@ flush_journal(State = #qistate { segments = Segments }) ->
     {JournalHdl, State1} =
         get_journal_handle(State #qistate { segments = Segments1 }),
     ok = file_handle_cache:clear(JournalHdl),
-    State1 #qistate { dirty_count = 0 }.
+    notify_sync(State1 #qistate { dirty_count = 0 }).
 
 append_journal_to_segment(#segment { journal_entries = JEntries,
                                      path = Path } = Segment) ->
@@ -713,6 +708,18 @@ deliver_or_ack(Kind, SeqIds, State) ->
                                             add_to_journal(SeqId, Kind, StateN)
                                     end, State1, SeqIds)).
 
+sync_if(false, State) ->
+    State;
+sync_if(_Bool, State = #qistate { journal_handle = undefined }) ->
+    State;
+sync_if(true, State = #qistate { journal_handle = JournalHdl }) ->
+    ok = file_handle_cache:sync(JournalHdl),
+    notify_sync(State).
+
+notify_sync(State = #qistate { unsynced_guids = UG, on_sync = OnSyncFun }) ->
+    OnSyncFun(gb_sets:from_list(UG)),
+    State #qistate { unsynced_guids = [] }.
+
 %%----------------------------------------------------------------------------
 %% segment manipulation
 %%----------------------------------------------------------------------------
@@ -1039,27 +1046,26 @@ transform_queue(Dir, Gatherer, {JournalFun, SegmentFun}) ->
 
 transform_file(Path, Fun) ->
     PathTmp = Path ++ ".upgrade",
-    Size = filelib:file_size(Path),
+    case filelib:file_size(Path) of
+        0    -> ok;
+        Size -> {ok, PathTmpHdl} =
+                    file_handle_cache:open(PathTmp, ?WRITE_MODE,
+                                           [{write_buffer, infinity}]),
 
-    {ok, PathTmpHdl} =
-        file_handle_cache:open(PathTmp, [exclusive | ?WRITE_MODE],
-                               [{write_buffer, infinity}]),
+                {ok, PathHdl} = file_handle_cache:open(
+                                  Path, [{read_ahead, Size} | ?READ_MODE], []),
+                {ok, Content} = file_handle_cache:read(PathHdl, Size),
+                ok = file_handle_cache:close(PathHdl),
 
-    {ok, PathHdl} =
-        file_handle_cache:open(Path, [{read_ahead, Size} | ?READ_MODE], []),
-    {ok, Content} = file_handle_cache:read(PathHdl, Size),
-    ok = file_handle_cache:close(PathHdl),
+                ok = drive_transform_fun(Fun, PathTmpHdl, Content),
 
-    ok = drive_transform_fun(Fun, PathTmpHdl, Content),
-
-    ok = file_handle_cache:close(PathTmpHdl),
-    ok = file:rename(PathTmp, Path).
+                ok = file_handle_cache:close(PathTmpHdl),
+                ok = file:rename(PathTmp, Path)
+    end.
 
 drive_transform_fun(Fun, Hdl, Contents) ->
     case Fun(Contents) of
-        stop ->
-            ok;
-        {Output, Contents1} ->
-            ok = file_handle_cache:append(Hdl, Output),
-            drive_transform_fun(Fun, Hdl, Contents1)
+        stop                -> ok;
+        {Output, Contents1} -> ok = file_handle_cache:append(Hdl, Output),
+                               drive_transform_fun(Fun, Hdl, Contents1)
     end.
diff --git a/src/rabbit_reader.erl b/src/rabbit_reader.erl
index 71115a73..696dc265 100644
--- a/src/rabbit_reader.erl
+++ b/src/rabbit_reader.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_reader).
@@ -41,7 +26,7 @@
 
 -export([conserve_memory/2, server_properties/0]).
 
--export([analyze_frame/3]).
+-export([process_channel_frame/5]). %% used by erlang-client
 
 -export([emit_stats/1]).
 
@@ -56,14 +41,17 @@
 
 -record(v1, {parent, sock, connection, callback, recv_length, recv_ref,
              connection_state, queue_collector, heartbeater, stats_timer,
-             channel_sup_sup_pid, start_heartbeat_fun}).
+             channel_sup_sup_pid, start_heartbeat_fun, auth_mechanism,
+             auth_state}).
 
 -define(STATISTICS_KEYS, [pid, recv_oct, recv_cnt, send_oct, send_cnt,
                           send_pend, state, channels]).
 
 -define(CREATION_EVENT_KEYS, [pid, address, port, peer_address, peer_port, ssl,
                               peer_cert_subject, peer_cert_issuer,
-                              peer_cert_validity,
+                              peer_cert_validity, auth_mechanism,
+                              ssl_protocol, ssl_key_exchange,
+                              ssl_cipher, ssl_hash,
                               protocol, user, vhost, timeout, frame_max,
                               client_properties]).
 
@@ -294,7 +282,9 @@ start_connection(Parent, ChannelSupSupPid, Collector, StartHeartbeatFun, Deb,
                             stats_timer         =
                                 rabbit_event:init_stats_timer(),
                             channel_sup_sup_pid = ChannelSupSupPid,
-                            start_heartbeat_fun = StartHeartbeatFun
+                            start_heartbeat_fun = StartHeartbeatFun,
+                            auth_mechanism      = none,
+                            auth_state          = none
                            },
                         handshake, 8))
     catch
@@ -344,12 +334,12 @@ mainloop(Deb, State = #v1{parent = Parent, sock= Sock, recv_ref = Ref}) ->
             %% since this termination is initiated by our parent it is
             %% probably more important to exit quickly.
             exit(Reason);
-        {channel_exit, _Chan, E = {writer, send_failed, _Error}} ->
+        {channel_exit, _Channel, E = {writer, send_failed, _Error}} ->
             throw(E);
-        {channel_exit, ChannelOrFrPid, Reason} ->
-            mainloop(Deb, handle_channel_exit(ChannelOrFrPid, Reason, State));
-        {'DOWN', _MRef, process, ChSupPid, Reason} ->
-            mainloop(Deb, handle_dependent_exit(ChSupPid, Reason, State));
+        {channel_exit, Channel, Reason} ->
+            mainloop(Deb, handle_exception(State, Channel, Reason));
+        {'DOWN', _MRef, process, ChPid, Reason} ->
+            mainloop(Deb, handle_dependent_exit(ChPid, Reason, State));
         terminate_connection ->
             State;
         handshake_timeout ->
@@ -440,45 +430,32 @@ close_channel(Channel, State) ->
     put({channel, Channel}, closing),
     State.
 
-handle_channel_exit(ChFrPid, Reason, State) when is_pid(ChFrPid) ->
-    {channel, Channel} = get({ch_fr_pid, ChFrPid}),
-    handle_exception(State, Channel, Reason);
-handle_channel_exit(Channel, Reason, State) ->
-    handle_exception(State, Channel, Reason).
-
-handle_dependent_exit(ChSupPid, Reason, State) ->
+handle_dependent_exit(ChPid, Reason, State) ->
     case termination_kind(Reason) of
         controlled ->
-            case erase({ch_sup_pid, ChSupPid}) of
-                undefined                                -> ok;
-                {_Channel, {ch_fr_pid, _ChFrPid} = ChFr} -> erase(ChFr)
-            end,
+            erase({ch_pid, ChPid}),
             maybe_close(State);
         uncontrolled ->
-            case channel_cleanup(ChSupPid) of
-                undefined ->
-                    exit({abnormal_dependent_exit, ChSupPid, Reason});
-                Channel ->
-                    maybe_close(handle_exception(State, Channel, Reason))
+            case channel_cleanup(ChPid) of
+                undefined -> exit({abnormal_dependent_exit, ChPid, Reason});
+                Channel   -> maybe_close(
+                               handle_exception(State, Channel, Reason))
             end
     end.
 
-channel_cleanup(ChSupPid) ->
-    case get({ch_sup_pid, ChSupPid}) of
-        undefined                  -> undefined;
-        {{channel, Channel}, ChFr} -> erase({channel, Channel}),
-                                      erase(ChFr),
-                                      erase({ch_sup_pid, ChSupPid}),
-                                      Channel
+channel_cleanup(ChPid) ->
+    case get({ch_pid, ChPid}) of
+        undefined -> undefined;
+        Channel   -> erase({channel, Channel}),
+                     erase({ch_pid, ChPid}),
+                     Channel
     end.
 
-all_channels() -> [ChFrPid || {{ch_sup_pid, _ChSupPid},
-                               {_Channel, {ch_fr_pid, ChFrPid}}} <- get()].
+all_channels() -> [ChPid || {{ch_pid, ChPid}, _Channel} <- get()].
 
 terminate_channels() ->
     NChannels =
-        length([rabbit_framing_channel:shutdown(ChFrPid)
-                || ChFrPid <- all_channels()]),
+        length([rabbit_channel:shutdown(ChPid) || ChPid <- all_channels()]),
     if NChannels > 0 ->
             Timeout = 1000 * ?CHANNEL_TERMINATION_TIMEOUT * NChannels,
             TimerRef = erlang:send_after(Timeout, self(), cancel_wait),
@@ -496,10 +473,10 @@ wait_for_channel_termination(0, TimerRef) ->
 
 wait_for_channel_termination(N, TimerRef) ->
     receive
-        {'DOWN', _MRef, process, ChSupPid, Reason} ->
-            case channel_cleanup(ChSupPid) of
+        {'DOWN', _MRef, process, ChPid, Reason} ->
+            case channel_cleanup(ChPid) of
                 undefined ->
-                    exit({abnormal_dependent_exit, ChSupPid, Reason});
+                    exit({abnormal_dependent_exit, ChPid, Reason});
                 Channel ->
                     case termination_kind(Reason) of
                         controlled ->
@@ -530,15 +507,13 @@ maybe_close(State) ->
     State.
 
 termination_kind(normal)            -> controlled;
-termination_kind(shutdown)          -> controlled;
-termination_kind({shutdown, _Term}) -> controlled;
 termination_kind(_)                 -> uncontrolled.
 
 handle_frame(Type, 0, Payload,
              State = #v1{connection_state = CS,
                          connection = #connection{protocol = Protocol}})
   when CS =:= closing; CS =:= closed ->
-    case analyze_frame(Type, Payload, Protocol) of
+    case rabbit_command_assembler:analyze_frame(Type, Payload, Protocol) of
         {method, MethodName, FieldsBin} ->
             handle_method0(MethodName, FieldsBin, State);
         _Other -> State
@@ -548,7 +523,7 @@ handle_frame(_Type, _Channel, _Payload, State = #v1{connection_state = CS})
     State;
 handle_frame(Type, 0, Payload,
              State = #v1{connection = #connection{protocol = Protocol}}) ->
-    case analyze_frame(Type, Payload, Protocol) of
+    case rabbit_command_assembler:analyze_frame(Type, Payload, Protocol) of
         error     -> throw({unknown_frame, 0, Type, Payload});
         heartbeat -> State;
         {method, MethodName, FieldsBin} ->
@@ -557,19 +532,23 @@ handle_frame(Type, 0, Payload,
     end;
 handle_frame(Type, Channel, Payload,
              State = #v1{connection = #connection{protocol = Protocol}}) ->
-    case analyze_frame(Type, Payload, Protocol) of
+    case rabbit_command_assembler:analyze_frame(Type, Payload, Protocol) of
         error         -> throw({unknown_frame, Channel, Type, Payload});
         heartbeat     -> throw({unexpected_heartbeat_frame, Channel});
         AnalyzedFrame ->
             case get({channel, Channel}) of
-                {ch_fr_pid, ChFrPid} ->
-                    ok = rabbit_framing_channel:process(ChFrPid, AnalyzedFrame),
+                {ChPid, FramingState} ->
+                    NewAState = process_channel_frame(
+                                  AnalyzedFrame, self(),
+                                  Channel, ChPid, FramingState),
+                    put({channel, Channel}, {ChPid, NewAState}),
                     case AnalyzedFrame of
                         {method, 'channel.close', _} ->
                             erase({channel, Channel}),
                             State;
                         {method, MethodName, _} ->
-                            case (State#v1.connection_state =:= blocking andalso
+                            case (State#v1.connection_state =:= blocking
+                                  andalso
                                   Protocol:method_has_content(MethodName)) of
                                 true  -> State#v1{connection_state = blocked};
                                 false -> State
@@ -590,16 +569,16 @@ handle_frame(Type, Channel, Payload,
                             %% We're already closing this channel, so
                             %% there's no cleanup to do (notify
                             %% queues, etc.)
-                            ok = rabbit_writer:send_command(State#v1.sock,
-                                                            #'channel.close_ok'{});
+                            ok = rabbit_writer:internal_send_command(
+                                   State#v1.sock, Channel,
+                                   #'channel.close_ok'{}, Protocol);
                         _ -> ok
                     end,
                     State;
                 undefined ->
                     case ?IS_RUNNING(State) of
-                        true  -> ok = send_to_new_channel(
-                                        Channel, AnalyzedFrame, State),
-                                 State;
+                        true  -> send_to_new_channel(
+                                   Channel, AnalyzedFrame, State);
                         false -> throw({channel_frame_while_starting,
                                         Channel, State#v1.connection_state,
                                         AnalyzedFrame})
@@ -607,22 +586,6 @@ handle_frame(Type, Channel, Payload,
             end
     end.
 
-analyze_frame(?FRAME_METHOD,
-              <<ClassId:16, MethodId:16, MethodFields/binary>>,
-              Protocol) ->
-    MethodName = Protocol:lookup_method_name({ClassId, MethodId}),
-    {method, MethodName, MethodFields};
-analyze_frame(?FRAME_HEADER,
-              <<ClassId:16, Weight:16, BodySize:64, Properties/binary>>,
-              _Protocol) ->
-    {content_header, ClassId, Weight, BodySize, Properties};
-analyze_frame(?FRAME_BODY, Body, _Protocol) ->
-    {content_body, Body};
-analyze_frame(?FRAME_HEARTBEAT, <<>>, _Protocol) ->
-    heartbeat;
-analyze_frame(_Type, _Body, _Protocol) ->
-    error.
-
 handle_input(frame_header, <<Type:8,Channel:16,PayloadSize:32>>, State) ->
     ensure_stats_timer(
       switch_callback(State, {frame_payload, Type, Channel, PayloadSize},
@@ -680,11 +643,12 @@ handle_input(Callback, Data, _State) ->
 start_connection({ProtocolMajor, ProtocolMinor, _ProtocolRevision},
                  Protocol,
                  State = #v1{sock = Sock, connection = Connection}) ->
-    Start = #'connection.start'{ version_major = ProtocolMajor,
-                                 version_minor = ProtocolMinor,
-                                 server_properties = server_properties(),
-                                 mechanisms = <<"PLAIN AMQPLAIN">>,
-                                 locales = <<"en_US">> },
+    Start = #'connection.start'{
+      version_major = ProtocolMajor,
+      version_minor = ProtocolMinor,
+      server_properties = server_properties(),
+      mechanisms = auth_mechanisms_binary(),
+      locales = <<"en_US">> },
     ok = send_on_channel0(Sock, Start, Protocol),
     switch_callback(State#v1{connection = Connection#connection{
                                             timeout_sec = ?NORMAL_TIMEOUT,
@@ -709,42 +673,45 @@ ensure_stats_timer(State) ->
 
 handle_method0(MethodName, FieldsBin,
                State = #v1{connection = #connection{protocol = Protocol}}) ->
-    try
-        handle_method0(Protocol:decode_method_fields(MethodName, FieldsBin),
-                       State)
-    catch exit:Reason ->
-            CompleteReason = case Reason of
-                                 #amqp_error{method = none} ->
-                                     Reason#amqp_error{method = MethodName};
-                                 OtherReason -> OtherReason
-                             end,
+    HandleException =
+        fun(R) ->
             case ?IS_RUNNING(State) of
-                true  -> send_exception(State, 0, CompleteReason);
+                true  -> send_exception(State, 0, R);
                 %% We don't trust the client at this point - force
                 %% them to wait for a bit so they can't DOS us with
                 %% repeated failed logins etc.
                 false -> timer:sleep(?SILENT_CLOSE_DELAY * 1000),
-                         throw({channel0_error, State#v1.connection_state,
-                                CompleteReason})
+                         throw({channel0_error, State#v1.connection_state, R})
             end
+        end,
+    try
+        handle_method0(Protocol:decode_method_fields(MethodName, FieldsBin),
+                       State)
+    catch exit:#amqp_error{method = none} = Reason ->
+            HandleException(Reason#amqp_error{method = MethodName});
+          Type:Reason ->
+            HandleException({Type, Reason, MethodName, erlang:get_stacktrace()})
     end.
 
 handle_method0(#'connection.start_ok'{mechanism = Mechanism,
                                       response = Response,
                                       client_properties = ClientProperties},
-               State = #v1{connection_state = starting,
-                           connection = Connection =
-                               #connection{protocol = Protocol},
-                           sock = Sock}) ->
-    User = rabbit_access_control:check_login(Mechanism, Response),
-    Tune = #'connection.tune'{channel_max = 0,
-                              frame_max = ?FRAME_MAX,
-                              heartbeat = 0},
-    ok = send_on_channel0(Sock, Tune, Protocol),
-    State#v1{connection_state = tuning,
-             connection = Connection#connection{
-                            user = User,
-                            client_properties = ClientProperties}};
+               State0 = #v1{connection_state = starting,
+                            connection       = Connection,
+                            sock             = Sock}) ->
+    AuthMechanism = auth_mechanism_to_module(Mechanism),
+    State = State0#v1{auth_mechanism   = AuthMechanism,
+                      auth_state       = AuthMechanism:init(Sock),
+                      connection_state = securing,
+                      connection       =
+                          Connection#connection{
+                            client_properties = ClientProperties}},
+    auth_phase(Response, State);
+
+handle_method0(#'connection.secure_ok'{response = Response},
+               State = #v1{connection_state = securing}) ->
+    auth_phase(Response, State);
+
 handle_method0(#'connection.tune_ok'{frame_max = FrameMax,
                                      heartbeat = ClientHeartbeat},
                State = #v1{connection_state = tuning,
@@ -760,17 +727,10 @@ handle_method0(#'connection.tune_ok'{frame_max = FrameMax,
               not_allowed, "frame_max=~w > ~w max size",
               [FrameMax, ?FRAME_MAX]);
        true ->
-            SendFun =
-                fun() ->
-                        Frame = rabbit_binary_generator:build_heartbeat_frame(),
-                        catch rabbit_net:send(Sock, Frame)
-                end,
-
+            Frame = rabbit_binary_generator:build_heartbeat_frame(),
+            SendFun = fun() -> catch rabbit_net:send(Sock, Frame) end,
             Parent = self(),
-            ReceiveFun =
-                fun() ->
-                        Parent ! timeout
-                end,
+            ReceiveFun = fun() -> Parent ! timeout end,
             Heartbeater = SHF(Sock, ClientHeartbeat, SendFun,
                               ClientHeartbeat, ReceiveFun),
             State#v1{connection_state = opening,
@@ -801,7 +761,7 @@ handle_method0(#'connection.open'{virtual_host = VHostPath},
                             fun() -> internal_emit_stats(State1) end),
     State1;
 handle_method0(#'connection.close'{}, State) when ?IS_RUNNING(State) ->
-    lists:foreach(fun rabbit_framing_channel:shutdown/1, all_channels()),
+    lists:foreach(fun rabbit_channel:shutdown/1, all_channels()),
     maybe_close(State#v1{connection_state = closing});
 handle_method0(#'connection.close'{},
                State = #v1{connection_state = CS,
@@ -826,6 +786,61 @@ handle_method0(_Method, #v1{connection_state = S}) ->
 send_on_channel0(Sock, Method, Protocol) ->
     ok = rabbit_writer:internal_send_command(Sock, 0, Method, Protocol).
 
+auth_mechanism_to_module(TypeBin) ->
+    case rabbit_registry:binary_to_type(TypeBin) of
+        {error, not_found} ->
+            rabbit_misc:protocol_error(
+              command_invalid, "unknown authentication mechanism '~s'",
+              [TypeBin]);
+        T ->
+            case {lists:member(T, auth_mechanisms()),
+                  rabbit_registry:lookup_module(auth_mechanism, T)} of
+                {true, {ok, Module}} ->
+                    Module;
+                _ ->
+                    rabbit_misc:protocol_error(
+                      command_invalid,
+                      "invalid authentication mechanism '~s'", [T])
+            end
+    end.
+
+auth_mechanisms() ->
+    {ok, Configured} = application:get_env(auth_mechanisms),
+    [Name || {Name, _Module} <- rabbit_registry:lookup_all(auth_mechanism),
+             lists:member(Name, Configured)].
+
+auth_mechanisms_binary() ->
+    list_to_binary(
+            string:join(
+              [atom_to_list(A) || A <- auth_mechanisms()], " ")).
+
+auth_phase(Response,
+           State = #v1{auth_mechanism = AuthMechanism,
+                       auth_state = AuthState,
+                       connection = Connection =
+                           #connection{protocol = Protocol},
+                       sock = Sock}) ->
+    case AuthMechanism:handle_response(Response, AuthState) of
+        {refused, Msg, Args} ->
+            rabbit_misc:protocol_error(
+              access_refused, "~s login refused: ~s",
+              [proplists:get_value(name, AuthMechanism:description()),
+               io_lib:format(Msg, Args)]);
+        {protocol_error, Msg, Args} ->
+            rabbit_misc:protocol_error(syntax_error, Msg, Args);
+        {challenge, Challenge, AuthState1} ->
+            Secure = #'connection.secure'{challenge = Challenge},
+            ok = send_on_channel0(Sock, Secure, Protocol),
+            State#v1{auth_state = AuthState1};
+        {ok, User} ->
+            Tune = #'connection.tune'{channel_max = 0,
+                                      frame_max = ?FRAME_MAX,
+                                      heartbeat = 0},
+            ok = send_on_channel0(Sock, Tune, Protocol),
+            State#v1{connection_state = tuning,
+                     connection = Connection#connection{user = User}}
+    end.
+
 %%--------------------------------------------------------------------------
 
 infos(Items, State) -> [{Item, i(Item, State)} || Item <- Items].
@@ -842,6 +857,14 @@ i(peer_port, #v1{sock = Sock}) ->
     socket_info(fun rabbit_net:peername/1, fun ({_, P}) -> P end, Sock);
 i(ssl, #v1{sock = Sock}) ->
     rabbit_net:is_ssl(Sock);
+i(ssl_protocol, #v1{sock = Sock}) ->
+    ssl_info(fun ({P, _}) -> P end, Sock);
+i(ssl_key_exchange, #v1{sock = Sock}) ->
+    ssl_info(fun ({_, {K, _, _}}) -> K end, Sock);
+i(ssl_cipher, #v1{sock = Sock}) ->
+    ssl_info(fun ({_, {_, C, _}}) -> C end, Sock);
+i(ssl_hash, #v1{sock = Sock}) ->
+    ssl_info(fun ({_, {_, _, H}}) -> H end, Sock);
 i(peer_cert_issuer, #v1{sock = Sock}) ->
     cert_info(fun rabbit_ssl:peer_cert_issuer/1, Sock);
 i(peer_cert_subject, #v1{sock = Sock}) ->
@@ -863,6 +886,10 @@ i(protocol, #v1{connection = #connection{protocol = none}}) ->
     none;
 i(protocol, #v1{connection = #connection{protocol = Protocol}}) ->
     Protocol:version();
+i(auth_mechanism, #v1{auth_mechanism = none}) ->
+    none;
+i(auth_mechanism, #v1{auth_mechanism = Mechanism}) ->
+    proplists:get_value(name, Mechanism:description());
 i(user, #v1{connection = #connection{user = #user{username = Username}}}) ->
     Username;
 i(user, #v1{connection = #connection{user = none}}) ->
@@ -888,6 +915,13 @@ socket_info(Get, Select) ->
         {error, _} -> ''
     end.
 
+ssl_info(F, Sock) ->
+    case rabbit_net:ssl_info(Sock) of
+        nossl       -> '';
+        {error, _}  -> '';
+        {ok, Info}  -> F(Info)
+    end.
+
 cert_info(F, Sock) ->
     case rabbit_net:peercert(Sock) of
         nossl                -> '';
@@ -902,17 +936,31 @@ send_to_new_channel(Channel, AnalyzedFrame, State) ->
         channel_sup_sup_pid = ChanSupSup,
         connection = #connection{protocol  = Protocol,
                                  frame_max = FrameMax,
-                                 user      = #user{username = Username},
+                                 user      = User,
                                  vhost     = VHost}} = State,
-    {ok, ChSupPid, ChFrPid} =
+    {ok, _ChSupPid, {ChPid, AState}} =
         rabbit_channel_sup_sup:start_channel(
           ChanSupSup, {Protocol, Sock, Channel, FrameMax,
-                       self(), Username, VHost, Collector}),
-    erlang:monitor(process, ChSupPid),
-    put({channel, Channel}, {ch_fr_pid, ChFrPid}),
-    put({ch_sup_pid, ChSupPid}, {{channel, Channel}, {ch_fr_pid, ChFrPid}}),
-    put({ch_fr_pid, ChFrPid}, {channel, Channel}),
-    ok = rabbit_framing_channel:process(ChFrPid, AnalyzedFrame).
+                       self(), User, VHost, Collector}),
+    erlang:monitor(process, ChPid),
+    NewAState = process_channel_frame(AnalyzedFrame, self(),
+                                      Channel, ChPid, AState),
+    put({channel, Channel}, {ChPid, NewAState}),
+    put({ch_pid, ChPid}, Channel),
+    State.
+
+process_channel_frame(Frame, ErrPid, Channel, ChPid, AState) ->
+    case rabbit_command_assembler:process(Frame, AState) of
+        {ok, NewAState}                  -> NewAState;
+        {ok, Method, NewAState}          -> rabbit_channel:do(ChPid, Method),
+                                            NewAState;
+        {ok, Method, Content, NewAState} -> rabbit_channel:do(ChPid,
+                                                              Method, Content),
+                                            NewAState;
+        {error, Reason}                  -> ErrPid ! {channel_exit, Channel,
+                                                      Reason},
+                                            AState
+    end.
 
 log_channel_error(ConnectionState, Channel, Reason) ->
     rabbit_log:error("connection ~p (~p), channel ~p - error:~n~p~n",
diff --git a/src/rabbit_exchange_type_registry.erl b/src/rabbit_registry.erl
index f15275b5..795413aa 100644
--- a/src/rabbit_exchange_type_registry.erl
+++ b/src/rabbit_registry.erl
@@ -1,35 +1,20 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
--module(rabbit_exchange_type_registry).
+-module(rabbit_registry).
 
 -behaviour(gen_server).
 
@@ -38,7 +23,7 @@
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2,
          code_change/3]).
 
--export([register/2, binary_to_type/1, lookup_module/1]).
+-export([register/3, binary_to_type/1, lookup_module/2, lookup_all/1]).
 
 -define(SERVER, ?MODULE).
 -define(ETS_NAME, ?MODULE).
@@ -46,11 +31,12 @@
 -ifdef(use_specs).
 
 -spec(start_link/0 :: () -> rabbit_types:ok_pid_or_error()).
--spec(register/2 :: (binary(), atom()) -> 'ok').
+-spec(register/3 :: (atom(), binary(), atom()) -> 'ok').
 -spec(binary_to_type/1 ::
         (binary()) -> atom() | rabbit_types:error('not_found')).
--spec(lookup_module/1 ::
-        (atom()) -> rabbit_types:ok_or_error2(atom(), 'not_found')).
+-spec(lookup_module/2 ::
+        (atom(), atom()) -> rabbit_types:ok_or_error2(atom(), 'not_found')).
+-spec(lookup_all/1 :: (atom()) -> [{atom(), atom()}]).
 
 -endif.
 
@@ -61,8 +47,8 @@ start_link() ->
 
 %%---------------------------------------------------------------------------
 
-register(TypeName, ModuleName) ->
-    gen_server:call(?SERVER, {register, TypeName, ModuleName}).
+register(Class, TypeName, ModuleName) ->
+    gen_server:call(?SERVER, {register, Class, TypeName, ModuleName}).
 
 %% This is used with user-supplied arguments (e.g., on exchange
 %% declare), so we restrict it to existing atoms only.  This means it
@@ -74,47 +60,54 @@ binary_to_type(TypeBin) when is_binary(TypeBin) ->
         TypeAtom              -> TypeAtom
     end.
 
-lookup_module(T) when is_atom(T) ->
-    case ets:lookup(?ETS_NAME, T) of
+lookup_module(Class, T) when is_atom(T) ->
+    case ets:lookup(?ETS_NAME, {Class, T}) of
         [{_, Module}] ->
             {ok, Module};
         [] ->
             {error, not_found}
     end.
 
+lookup_all(Class) ->
+    [{K, V} || [K, V] <- ets:match(?ETS_NAME, {{Class, '$1'}, '$2'})].
+
 %%---------------------------------------------------------------------------
 
 internal_binary_to_type(TypeBin) when is_binary(TypeBin) ->
     list_to_atom(binary_to_list(TypeBin)).
 
-internal_register(TypeName, ModuleName)
-  when is_binary(TypeName), is_atom(ModuleName) ->
-    ok = sanity_check_module(ModuleName),
+internal_register(Class, TypeName, ModuleName)
+  when is_atom(Class), is_binary(TypeName), is_atom(ModuleName) ->
+    ok = sanity_check_module(class_module(Class), ModuleName),
     true = ets:insert(?ETS_NAME,
-                      {internal_binary_to_type(TypeName), ModuleName}),
+                      {{Class, internal_binary_to_type(TypeName)}, ModuleName}),
     ok.
 
-sanity_check_module(Module) ->
-    case catch lists:member(rabbit_exchange_type,
+sanity_check_module(ClassModule, Module) ->
+    case catch lists:member(ClassModule,
                             lists:flatten(
                               [Bs || {Attr, Bs} <-
                                          Module:module_info(attributes),
                                      Attr =:= behavior orelse
                                          Attr =:= behaviour])) of
         {'EXIT', {undef, _}}  -> {error, not_module};
-        false                 -> {error, not_exchange_type};
+        false                 -> {error, {not_type, ClassModule}};
         true                  -> ok
     end.
 
+class_module(exchange)       -> rabbit_exchange_type;
+class_module(auth_mechanism) -> rabbit_auth_mechanism.
+
 %%---------------------------------------------------------------------------
 
 init([]) ->
     ?ETS_NAME = ets:new(?ETS_NAME, [protected, set, named_table]),
     {ok, none}.
 
-handle_call({register, TypeName, ModuleName}, _From, State) ->
-    ok = internal_register(TypeName, ModuleName),
+handle_call({register, Class, TypeName, ModuleName}, _From, State) ->
+    ok = internal_register(Class, TypeName, ModuleName),
     {reply, ok, State};
+
 handle_call(Request, _From, State) ->
     {stop, {unhandled_call, Request}, State}.
 
diff --git a/src/rabbit_restartable_sup.erl b/src/rabbit_restartable_sup.erl
index 06d59249..0491244b 100644
--- a/src/rabbit_restartable_sup.erl
+++ b/src/rabbit_restartable_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_restartable_sup).
diff --git a/src/rabbit_router.erl b/src/rabbit_router.erl
index 00df1ce1..692d2473 100644
--- a/src/rabbit_router.erl
+++ b/src/rabbit_router.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_router).
@@ -72,7 +57,8 @@ deliver(QNames, Delivery = #delivery{mandatory = false,
       QPids, fun (Pid) -> rabbit_amqqueue:deliver(Pid, Delivery) end),
     {routed, QPids};
 
-deliver(QNames, Delivery) ->
+deliver(QNames, Delivery = #delivery{mandatory = Mandatory,
+                                    immediate = Immediate}) ->
     QPids = lookup_qpids(QNames),
     {Success, _} =
         delegate:invoke(QPids,
@@ -80,9 +66,9 @@ deliver(QNames, Delivery) ->
                                 rabbit_amqqueue:deliver(Pid, Delivery)
                         end),
     {Routed, Handled} =
-        lists:foldl(fun fold_deliveries/2, {false, []}, Success),
-    check_delivery(Delivery#delivery.mandatory, Delivery#delivery.immediate,
-                   {Routed, Handled}).
+         lists:foldl(fun fold_deliveries/2, {false, []}, Success),
+    check_delivery(Mandatory, Immediate, {Routed, Handled}).
+
 
 %% TODO: Maybe this should be handled by a cursor instead.
 %% TODO: This causes a full scan for each entry with the same source
diff --git a/src/rabbit_sasl_report_file_h.erl b/src/rabbit_sasl_report_file_h.erl
index eb2037c2..6f3c5c75 100644
--- a/src/rabbit_sasl_report_file_h.erl
+++ b/src/rabbit_sasl_report_file_h.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_sasl_report_file_h).
diff --git a/src/rabbit_ssl.erl b/src/rabbit_ssl.erl
index 1d8ce23b..e831ee51 100644
--- a/src/rabbit_ssl.erl
+++ b/src/rabbit_ssl.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_ssl).
@@ -36,6 +21,7 @@
 -include_lib("public_key/include/public_key.hrl").
 
 -export([peer_cert_issuer/1, peer_cert_subject/1, peer_cert_validity/1]).
+-export([peer_cert_subject_item/2]).
 
 %%--------------------------------------------------------------------------
 
@@ -45,9 +31,11 @@
 
 -type(certificate() :: binary()).
 
--spec(peer_cert_issuer/1   :: (certificate()) -> string()).
--spec(peer_cert_subject/1  :: (certificate()) -> string()).
--spec(peer_cert_validity/1 :: (certificate()) -> string()).
+-spec(peer_cert_issuer/1        :: (certificate()) -> string()).
+-spec(peer_cert_subject/1       :: (certificate()) -> string()).
+-spec(peer_cert_validity/1      :: (certificate()) -> string()).
+-spec(peer_cert_subject_item/2  ::
+        (certificate(), tuple()) -> string() | 'not_found').
 
 -endif.
 
@@ -71,6 +59,14 @@ peer_cert_subject(Cert) ->
                       format_rdn_sequence(Subject)
               end, Cert).
 
+%% Return a part of the certificate's subject.
+peer_cert_subject_item(Cert, Type) ->
+    cert_info(fun(#'OTPCertificate' {
+                     tbsCertificate = #'OTPTBSCertificate' {
+                       subject = Subject }}) ->
+                      find_by_type(Type, Subject)
+              end, Cert).
+
 %% Return a string describing the certificate's validity.
 peer_cert_validity(Cert) ->
     cert_info(fun(#'OTPCertificate' {
@@ -89,6 +85,14 @@ cert_info(F, Cert) ->
           DecCert       -> DecCert  %%R14B onwards
       end).
 
+find_by_type(Type, {rdnSequence, RDNs}) ->
+    case [V || #'AttributeTypeAndValue'{type = T, value = V}
+                     <- lists:flatten(RDNs),
+                 T == Type] of
+        [{printableString, S}] -> S;
+        []                     -> not_found
+    end.
+
 %%--------------------------------------------------------------------------
 %% Formatting functions
 %%--------------------------------------------------------------------------
diff --git a/src/rabbit_sup.erl b/src/rabbit_sup.erl
index 97613d17..508b127e 100644
--- a/src/rabbit_sup.erl
+++ b/src/rabbit_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_sup).
diff --git a/src/rabbit_tests.erl b/src/rabbit_tests.erl
index 27e4d925..49b09508 100644
--- a/src/rabbit_tests.erl
+++ b/src/rabbit_tests.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_tests).
@@ -35,8 +20,6 @@
 
 -export([all_tests/0, test_parsing/0]).
 
--import(lists).
-
 -include("rabbit.hrl").
 -include("rabbit_framing.hrl").
 -include_lib("kernel/include/file.hrl").
@@ -98,6 +81,22 @@ run_cluster_dependent_tests(SecondaryNode) ->
     passed = test_delegates_async(SecondaryNode),
     passed = test_delegates_sync(SecondaryNode),
 
+    %% we now run the tests remotely, so that code coverage on the
+    %% local node picks up more of the delegate
+    Node = node(),
+    Self = self(),
+    Remote = spawn(SecondaryNode,
+                   fun () -> A = test_delegates_async(Node),
+                             B = test_delegates_sync(Node),
+                             Self ! {self(), {A, B}}
+                   end),
+    receive
+        {Remote, Result} ->
+            Result = {passed, passed}
+    after 2000 ->
+            throw(timeout)
+    end,
+
     passed.
 
 test_priority_queue() ->
@@ -1016,7 +1015,7 @@ test_server_status() ->
     %% create a few things so there is some useful information to list
     Writer = spawn(fun () -> receive shutdown -> ok end end),
     {ok, Ch} = rabbit_channel:start_link(1, self(), Writer,
-                                         <<"user">>, <<"/">>, self(),
+                                         user(<<"user">>), <<"/">>, self(),
                                          fun (_) -> {ok, self()} end),
     [Q, Q2] = [Queue || Name <- [<<"foo">>, <<"bar">>],
                         {new, Queue = #amqqueue{}} <-
@@ -1076,7 +1075,7 @@ test_spawn(Receiver) ->
     Me = self(),
     Writer = spawn(fun () -> Receiver(Me) end),
     {ok, Ch} = rabbit_channel:start_link(1, Me, Writer,
-                                         <<"guest">>, <<"/">>, self(),
+                                         user(<<"guest">>), <<"/">>, self(),
                                          fun (_) -> {ok, self()} end),
     ok = rabbit_channel:do(Ch, #'channel.open'{}),
     receive #'channel.open_ok'{} -> ok
@@ -1084,6 +1083,13 @@ test_spawn(Receiver) ->
     end,
     {Writer, Ch}.
 
+user(Username) ->
+    #user{username     = Username,
+          is_admin     = true,
+          auth_backend = rabbit_auth_backend_internal,
+          impl         = #internal_user{username = Username,
+                                        is_admin = true}}.
+
 test_statistics_receiver(Pid) ->
     receive
         shutdown ->
@@ -1249,15 +1255,26 @@ test_delegates_sync(SecondaryNode) ->
     true = lists:all(fun ({_, response}) -> true end, GoodRes),
     GoodResPids = [Pid || {Pid, _} <- GoodRes],
 
-    Good = ordsets:from_list(LocalGoodPids ++ RemoteGoodPids),
-    Good = ordsets:from_list(GoodResPids),
+    Good = lists:usort(LocalGoodPids ++ RemoteGoodPids),
+    Good = lists:usort(GoodResPids),
 
     {[], BadRes} = delegate:invoke(LocalBadPids ++ RemoteBadPids, BadSender),
     true = lists:all(fun ({_, {exit, exception, _}}) -> true end, BadRes),
     BadResPids = [Pid || {Pid, _} <- BadRes],
 
-    Bad = ordsets:from_list(LocalBadPids ++ RemoteBadPids),
-    Bad = ordsets:from_list(BadResPids),
+    Bad = lists:usort(LocalBadPids ++ RemoteBadPids),
+    Bad = lists:usort(BadResPids),
+
+    MagicalPids = [rabbit_misc:string_to_pid(Str) ||
+                      Str <- ["<nonode@nohost.0.1.0>", "<nonode@nohost.0.2.0>"]],
+    {[], BadNodes} = delegate:invoke(MagicalPids, Sender),
+    true = lists:all(
+             fun ({_, {exit, {nodedown, nonode@nohost}, _Stack}}) -> true end,
+             BadNodes),
+    BadNodesPids = [Pid || {Pid, _} <- BadNodes],
+
+    Magical = lists:usort(MagicalPids),
+    Magical = lists:usort(BadNodesPids),
 
     passed.
 
@@ -1411,6 +1428,7 @@ test_backing_queue() ->
             passed = test_queue_index(),
             passed = test_queue_index_props(),
             passed = test_variable_queue(),
+            passed = test_variable_queue_delete_msg_store_files_callback(),
             passed = test_queue_recover(),
             application:set_env(rabbit, queue_index_max_journal_entries,
                                 MaxJournal, infinity),
@@ -1427,6 +1445,9 @@ restart_msg_store_empty() ->
 guid_bin(X) ->
     erlang:md5(term_to_binary(X)).
 
+msg_store_client_init(MsgStore, Ref) ->
+    rabbit_msg_store:client_init(MsgStore, Ref, undefined, undefined).
+
 msg_store_contains(Atom, Guids, MSCState) ->
     Atom = lists:foldl(
              fun (Guid, Atom1) when Atom1 =:= Atom ->
@@ -1470,12 +1491,12 @@ msg_store_remove(MsgStore, Ref, Guids) ->
 
 with_msg_store_client(MsgStore, Ref, Fun) ->
     rabbit_msg_store:client_terminate(
-      Fun(rabbit_msg_store:client_init(MsgStore, Ref))).
+      Fun(msg_store_client_init(MsgStore, Ref))).
 
 foreach_with_msg_store_client(MsgStore, Ref, Fun, L) ->
     rabbit_msg_store:client_terminate(
       lists:foldl(fun (Guid, MSCState) -> Fun(Guid, MSCState) end,
-                  rabbit_msg_store:client_init(MsgStore, Ref), L)).
+                  msg_store_client_init(MsgStore, Ref), L)).
 
 test_msg_store() ->
     restart_msg_store_empty(),
@@ -1483,7 +1504,7 @@ test_msg_store() ->
     Guids = [guid_bin(M) || M <- lists:seq(1,100)],
     {Guids1stHalf, Guids2ndHalf} = lists:split(50, Guids),
     Ref = rabbit_guid:guid(),
-    MSCState = rabbit_msg_store:client_init(?PERSISTENT_MSG_STORE, Ref),
+    MSCState = msg_store_client_init(?PERSISTENT_MSG_STORE, Ref),
     %% check we don't contain any of the msgs we're about to publish
     false = msg_store_contains(false, Guids, MSCState),
     %% publish the first half
@@ -1549,7 +1570,7 @@ test_msg_store() ->
                     ([Guid|GuidsTail]) ->
                         {Guid, 0, GuidsTail}
                 end, Guids2ndHalf}),
-    MSCState5 = rabbit_msg_store:client_init(?PERSISTENT_MSG_STORE, Ref),
+    MSCState5 = msg_store_client_init(?PERSISTENT_MSG_STORE, Ref),
     %% check we have the right msgs left
     lists:foldl(
       fun (Guid, Bool) ->
@@ -1558,7 +1579,7 @@ test_msg_store() ->
     ok = rabbit_msg_store:client_terminate(MSCState5),
     %% restart empty
     restart_msg_store_empty(),
-    MSCState6 = rabbit_msg_store:client_init(?PERSISTENT_MSG_STORE, Ref),
+    MSCState6 = msg_store_client_init(?PERSISTENT_MSG_STORE, Ref),
     %% check we don't contain any of the msgs
     false = msg_store_contains(false, Guids, MSCState6),
     %% publish the first half again
@@ -1566,7 +1587,7 @@ test_msg_store() ->
     %% this should force some sort of sync internally otherwise misread
     ok = rabbit_msg_store:client_terminate(
            msg_store_read(Guids1stHalf, MSCState6)),
-    MSCState7 = rabbit_msg_store:client_init(?PERSISTENT_MSG_STORE, Ref),
+    MSCState7 = msg_store_client_init(?PERSISTENT_MSG_STORE, Ref),
     ok = rabbit_msg_store:remove(Guids1stHalf, MSCState7),
     ok = rabbit_msg_store:client_terminate(MSCState7),
     %% restart empty
@@ -1624,13 +1645,13 @@ init_test_queue() ->
     TestQueue = test_queue(),
     Terms = rabbit_queue_index:shutdown_terms(TestQueue),
     PRef = proplists:get_value(persistent_ref, Terms, rabbit_guid:guid()),
-    PersistentClient = rabbit_msg_store:client_init(?PERSISTENT_MSG_STORE,
-                                                    PRef),
+    PersistentClient = msg_store_client_init(?PERSISTENT_MSG_STORE, PRef),
     Res = rabbit_queue_index:recover(
             TestQueue, Terms, false,
             fun (Guid) ->
                     rabbit_msg_store:contains(Guid, PersistentClient)
-            end),
+            end,
+            fun nop/1),
     ok = rabbit_msg_store:client_delete_and_terminate(PersistentClient),
     Res.
 
@@ -1658,8 +1679,8 @@ queue_index_publish(SeqIds, Persistent, Qi) ->
                    true  -> ?PERSISTENT_MSG_STORE;
                    false -> ?TRANSIENT_MSG_STORE
                end,
-    MSCState = rabbit_msg_store:client_init(MsgStore, Ref),
-    {A, B} =
+    MSCState = msg_store_client_init(MsgStore, Ref),
+    {A, B = [{_SeqId, LastGuidWritten} | _]} =
         lists:foldl(
           fun (SeqId, {QiN, SeqIdsGuidsAcc}) ->
                   Guid = rabbit_guid:guid(),
@@ -1668,6 +1689,8 @@ queue_index_publish(SeqIds, Persistent, Qi) ->
                   ok = rabbit_msg_store:write(Guid, Guid, MSCState),
                   {QiM, [{SeqId, Guid} | SeqIdsGuidsAcc]}
           end, {Qi, []}, SeqIds),
+    %% do this just to force all of the publishes through to the msg_store:
+    true = rabbit_msg_store:contains(LastGuidWritten, MSCState),
     ok = rabbit_msg_store:client_delete_and_terminate(MSCState),
     {A, B}.
 
@@ -1850,7 +1873,8 @@ assert_props(List, PropVals) ->
 
 with_fresh_variable_queue(Fun) ->
     ok = empty_test_queue(),
-    VQ = rabbit_variable_queue:init(test_queue(), true, false),
+    VQ = rabbit_variable_queue:init(test_queue(), true, false,
+                                    fun nop/2, fun nop/1),
     S0 = rabbit_variable_queue:status(VQ),
     assert_props(S0, [{q1, 0}, {q2, 0},
                       {delta, {delta, undefined, 0, undefined}},
@@ -1892,7 +1916,7 @@ test_variable_queue_ack_limiting(VQ0) ->
     VQ6 = check_variable_queue_status(
             rabbit_variable_queue:set_ram_duration_target(0, VQ5),
             [{len, Len div 2},
-             {target_ram_item_count, 0},
+             {target_ram_count, 0},
              {ram_msg_count, 0},
              {ram_ack_count, 0}]),
 
@@ -1935,7 +1959,6 @@ test_variable_queue_dynamic_duration_change(VQ0) ->
     %% start by sending in a couple of segments worth
     Len = 2*SegmentSize,
     VQ1 = variable_queue_publish(false, Len, VQ0),
-
     %% squeeze and relax queue
     Churn = Len div 32,
     VQ2 = publish_fetch_and_ack(Churn, Len, VQ1),
@@ -1963,7 +1986,8 @@ publish_fetch_and_ack(0, _Len, VQ0) ->
 publish_fetch_and_ack(N, Len, VQ0) ->
     VQ1 = variable_queue_publish(false, 1, VQ0),
     {{_Msg, false, AckTag, Len}, VQ2} = rabbit_variable_queue:fetch(true, VQ1),
-    publish_fetch_and_ack(N-1, Len, rabbit_variable_queue:ack([AckTag], VQ2)).
+    VQ3 = rabbit_variable_queue:ack([AckTag], VQ2),
+    publish_fetch_and_ack(N-1, Len, VQ3).
 
 test_variable_queue_partial_segments_delta_thing(VQ0) ->
     SegmentSize = rabbit_queue_index:next_segment_boundary(0),
@@ -2025,7 +2049,8 @@ test_variable_queue_all_the_bits_not_covered_elsewhere1(VQ0) ->
     {VQ5, _AckTags1} = variable_queue_fetch(Count, false, false,
                                             Count, VQ4),
     _VQ6 = rabbit_variable_queue:terminate(VQ5),
-    VQ7 = rabbit_variable_queue:init(test_queue(), true, true),
+    VQ7 = rabbit_variable_queue:init(test_queue(), true, true,
+                                     fun nop/2, fun nop/1),
     {{_Msg1, true, _AckTag1, Count1}, VQ8} =
         rabbit_variable_queue:fetch(true, VQ7),
     VQ9 = variable_queue_publish(false, 1, VQ8),
@@ -2041,7 +2066,8 @@ test_variable_queue_all_the_bits_not_covered_elsewhere2(VQ0) ->
     VQ4 = rabbit_variable_queue:requeue(AckTags, fun(X) -> X end, VQ3),
     VQ5 = rabbit_variable_queue:idle_timeout(VQ4),
     _VQ6 = rabbit_variable_queue:terminate(VQ5),
-    VQ7 = rabbit_variable_queue:init(test_queue(), true, true),
+    VQ7 = rabbit_variable_queue:init(test_queue(), true, true,
+                                     fun nop/2, fun nop/1),
     {empty, VQ8} = rabbit_variable_queue:fetch(false, VQ7),
     VQ8.
 
@@ -2050,12 +2076,13 @@ test_queue_recover() ->
     TxID = rabbit_guid:guid(),
     {new, #amqqueue { pid = QPid, name = QName }} =
         rabbit_amqqueue:declare(test_queue(), true, false, [], none),
-    Msg = rabbit_basic:message(rabbit_misc:r(<<>>, exchange, <<>>),
-                               <<>>, #'P_basic'{delivery_mode = 2}, <<>>),
-    Delivery = #delivery{mandatory = false, immediate = false, txn = TxID,
-                         sender = self(), message = Msg},
-    [true = rabbit_amqqueue:deliver(QPid, Delivery) ||
-        _ <- lists:seq(1, Count)],
+    [begin
+         Msg = rabbit_basic:message(rabbit_misc:r(<<>>, exchange, <<>>),
+                                    <<>>, #'P_basic'{delivery_mode = 2}, <<>>),
+         Delivery = #delivery{mandatory = false, immediate = false, txn = TxID,
+                              sender = self(), message = Msg},
+         true = rabbit_amqqueue:deliver(QPid, Delivery)
+     end || _ <- lists:seq(1, Count)],
     rabbit_amqqueue:commit_all([QPid], TxID, self()),
     exit(QPid, kill),
     MRef = erlang:monitor(process, QPid),
@@ -2071,7 +2098,8 @@ test_queue_recover() ->
               {ok, CountMinusOne, {QName, QPid1, _AckTag, true, _Msg}} =
                   rabbit_amqqueue:basic_get(Q1, self(), false),
               exit(QPid1, shutdown),
-              VQ1 = rabbit_variable_queue:init(QName, true, true),
+              VQ1 = rabbit_variable_queue:init(QName, true, true,
+                                               fun nop/2, fun nop/1),
               {{_Msg1, true, _AckTag1, CountMinusOne}, VQ2} =
                   rabbit_variable_queue:fetch(true, VQ1),
               _VQ3 = rabbit_variable_queue:delete_and_terminate(VQ2),
@@ -2079,6 +2107,35 @@ test_queue_recover() ->
       end),
     passed.
 
+test_variable_queue_delete_msg_store_files_callback() ->
+    ok = restart_msg_store_empty(),
+    {new, #amqqueue { pid = QPid, name = QName } = Q} =
+        rabbit_amqqueue:declare(test_queue(), true, false, [], none),
+    TxID = rabbit_guid:guid(),
+    Payload = <<0:8388608>>, %% 1MB
+    Count = 30,
+    [begin
+         Msg = rabbit_basic:message(
+                 rabbit_misc:r(<<>>, exchange, <<>>),
+                 <<>>, #'P_basic'{delivery_mode = 2}, Payload),
+         Delivery = #delivery{mandatory = false, immediate = false, txn = TxID,
+                              sender = self(), message = Msg},
+         true = rabbit_amqqueue:deliver(QPid, Delivery)
+     end || _ <- lists:seq(1, Count)],
+    rabbit_amqqueue:commit_all([QPid], TxID, self()),
+    rabbit_amqqueue:set_ram_duration_target(QPid, 0),
+
+    CountMinusOne = Count - 1,
+    {ok, CountMinusOne, {QName, QPid, _AckTag, false, _Msg}} =
+        rabbit_amqqueue:basic_get(Q, self(), true),
+    {ok, CountMinusOne} = rabbit_amqqueue:purge(Q),
+
+    %% give the queue a second to receive the close_fds callback msg
+    timer:sleep(1000),
+
+    rabbit_amqqueue:delete(Q, false, false),
+    passed.
+
 test_configurable_server_properties() ->
     %% List of the names of the built-in properties do we expect to find
     BuiltInPropNames = [<<"product">>, <<"version">>, <<"platform">>,
@@ -2131,3 +2188,6 @@ test_configurable_server_properties() ->
 
     application:set_env(rabbit, server_properties, ServerProperties),
     passed.
+
+nop(_) -> ok.
+nop(_, _) -> ok.
diff --git a/src/rabbit_tests_event_receiver.erl b/src/rabbit_tests_event_receiver.erl
index a92e3da7..12c43faf 100644
--- a/src/rabbit_tests_event_receiver.erl
+++ b/src/rabbit_tests_event_receiver.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_tests_event_receiver).
diff --git a/src/rabbit_types.erl b/src/rabbit_types.erl
index b9993823..3dbe740f 100644
--- a/src/rabbit_types.erl
+++ b/src/rabbit_types.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_types).
@@ -42,8 +27,9 @@
               vhost/0, ctag/0, amqp_error/0, r/1, r2/2, r3/3, listener/0,
               binding/0, binding_source/0, binding_destination/0,
               amqqueue/0, exchange/0,
-              connection/0, protocol/0, user/0, ok/1, error/1, ok_or_error/1,
-              ok_or_error2/2, ok_pid_or_error/0, channel_exit/0,
+              connection/0, protocol/0, user/0, internal_user/0,
+              username/0, password/0, password_hash/0, ok/1, error/1,
+              ok_or_error/1, ok_or_error2/2, ok_pid_or_error/0, channel_exit/0,
               connection_exit/0]).
 
 -type(channel_exit() :: no_return()).
@@ -90,7 +76,8 @@
                 sender    :: pid(),
                 message   :: message()}).
 -type(message_properties() ::
-        #message_properties{expiry :: pos_integer() | 'undefined'}).
+        #message_properties{expiry :: pos_integer() | 'undefined',
+                            needs_confirming :: boolean()}).
 
 %% this is really an abstract type, but dialyzer does not support them
 -type(txn() :: rabbit_guid:guid()).
@@ -150,9 +137,19 @@
 -type(protocol() :: rabbit_framing:protocol()).
 
 -type(user() ::
-      #user{username      :: rabbit_access_control:username(),
-            password_hash :: rabbit_access_control:password_hash(),
-            is_admin      :: boolean()}).
+        #user{username     :: username(),
+              is_admin     :: boolean(),
+              auth_backend :: atom(),
+              impl         :: any()}).
+
+-type(internal_user() ::
+        #internal_user{username      :: username(),
+                       password_hash :: password_hash(),
+                       is_admin      :: boolean()}).
+
+-type(username() :: binary()).
+-type(password() :: binary()).
+-type(password_hash() :: binary()).
 
 -type(ok(A) :: {'ok', A}).
 -type(error(A) :: {'error', A}).
diff --git a/src/rabbit_upgrade.erl b/src/rabbit_upgrade.erl
index 27a94f6f..b0a71523 100644
--- a/src/rabbit_upgrade.erl
+++ b/src/rabbit_upgrade.erl
@@ -1,22 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are Rabbit Technologies Ltd.
-%%
-%%   Copyright (C) 2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_upgrade).
@@ -126,19 +121,35 @@ heads(G) ->
 %% -------------------------------------------------------------------
 
 apply_upgrades(Upgrades) ->
-    LockFile = lock_filename(),
-    case file:open(LockFile, [write, exclusive]) of
-        {ok, Lock} ->
-            ok = file:close(Lock),
+    LockFile = lock_filename(dir()),
+    case rabbit_misc:lock_file(LockFile) of
+        ok ->
+            BackupDir = dir() ++ "-upgrade-backup",
             info("Upgrades: ~w to apply~n", [length(Upgrades)]),
-            [apply_upgrade(Upgrade) || Upgrade <- Upgrades],
-            info("Upgrades: All applied~n", []),
-            ok = write_version(),
-            ok = file:delete(LockFile);
+            case rabbit_mnesia:copy_db(BackupDir) of
+                ok ->
+                    %% We need to make the backup after creating the
+                    %% lock file so that it protects us from trying to
+                    %% overwrite the backup. Unfortunately this means
+                    %% the lock file exists in the backup too, which
+                    %% is not intuitive. Remove it.
+                    ok = file:delete(lock_filename(BackupDir)),
+                    info("Upgrades: Mnesia dir backed up to ~p~n", [BackupDir]),
+                    [apply_upgrade(Upgrade) || Upgrade <- Upgrades],
+                    info("Upgrades: All upgrades applied successfully~n", []),
+                    ok = write_version(),
+                    ok = rabbit_misc:recursive_delete([BackupDir]),
+                    info("Upgrades: Mnesia backup removed~n", []),
+                    ok = file:delete(LockFile);
+                {error, E} ->
+                    %% If we can't backup, the upgrade hasn't started
+                    %% hence we don't need the lockfile since the real
+                    %% mnesia dir is the good one.
+                    ok = file:delete(LockFile),
+                    throw({could_not_back_up_mnesia_dir, E})
+            end;
         {error, eexist} ->
-            throw({error, previous_upgrade_failed});
-        {error, _} = Error ->
-            throw(Error)
+            throw({error, previous_upgrade_failed})
     end.
 
 apply_upgrade({M, F}) ->
@@ -151,7 +162,7 @@ dir() -> rabbit_mnesia:dir().
 
 schema_filename() -> filename:join(dir(), ?VERSION_FILENAME).
 
-lock_filename()   -> filename:join(dir(), ?LOCK_FILENAME).
+lock_filename(Dir) -> filename:join(Dir, ?LOCK_FILENAME).
 
 %% NB: we cannot use rabbit_log here since it may not have been
 %% started yet
diff --git a/src/rabbit_upgrade_functions.erl b/src/rabbit_upgrade_functions.erl
index 1c56d51d..68b88b3e 100644
--- a/src/rabbit_upgrade_functions.erl
+++ b/src/rabbit_upgrade_functions.erl
@@ -1,23 +1,19 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are Rabbit Technologies Ltd.
-%%
-%%   Copyright (C) 2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
+
 -module(rabbit_upgrade_functions).
 
 -include("rabbit.hrl").
@@ -27,6 +23,8 @@
 -rabbit_upgrade({remove_user_scope,  []}).
 -rabbit_upgrade({hash_passwords,     []}).
 -rabbit_upgrade({add_ip_to_listener, []}).
+-rabbit_upgrade({internal_exchanges, []}).
+-rabbit_upgrade({user_to_internal_user, [hash_passwords]}).
 
 %% -------------------------------------------------------------------
 
@@ -35,6 +33,8 @@
 -spec(remove_user_scope/0  :: () -> 'ok').
 -spec(hash_passwords/0     :: () -> 'ok').
 -spec(add_ip_to_listener/0 :: () -> 'ok').
+-spec(internal_exchanges/0 :: () -> 'ok').
+-spec(user_to_internal_user/0 :: () -> 'ok').
 
 -endif.
 
@@ -58,7 +58,7 @@ hash_passwords() ->
     mnesia(
       rabbit_user,
       fun ({user, Username, Password, IsAdmin}) ->
-              Hash = rabbit_access_control:hash_password(Password),
+              Hash = rabbit_auth_backend_internal:hash_password(Password),
               {user, Username, Hash, IsAdmin}
       end,
       [username, password_hash, is_admin]).
@@ -71,8 +71,33 @@ add_ip_to_listener() ->
       end,
       [node, protocol, host, ip_address, port]).
 
+internal_exchanges() ->
+    Tables = [rabbit_exchange, rabbit_durable_exchange],
+    AddInternalFun =
+        fun ({exchange, Name, Type, Durable, AutoDelete, Args}) ->
+                {exchange, Name, Type, Durable, AutoDelete, false, Args}
+        end,
+    [ ok = mnesia(T,
+                  AddInternalFun,
+                  [name, type, durable, auto_delete, internal, arguments])
+      || T <- Tables ],
+    ok.
+
+user_to_internal_user() ->
+    mnesia(
+      rabbit_user,
+      fun({user, Username, PasswordHash, IsAdmin}) ->
+              {internal_user, Username, PasswordHash, IsAdmin}
+      end,
+      [username, password_hash, is_admin], internal_user).
+
 %%--------------------------------------------------------------------
 
 mnesia(TableName, Fun, FieldList) ->
     {atomic, ok} = mnesia:transform_table(TableName, Fun, FieldList),
     ok.
+
+mnesia(TableName, Fun, FieldList, NewRecordName) ->
+    {atomic, ok} = mnesia:transform_table(TableName, Fun, FieldList,
+                                          NewRecordName),
+    ok.
diff --git a/src/rabbit_variable_queue.erl b/src/rabbit_variable_queue.erl
index 5ac042a2..7142d560 100644
--- a/src/rabbit_variable_queue.erl
+++ b/src/rabbit_variable_queue.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_variable_queue).
@@ -42,7 +27,7 @@
 -export([start/1, stop/0]).
 
 %% exported for testing only
--export([start_msg_store/2, stop_msg_store/0]).
+-export([start_msg_store/2, stop_msg_store/0, init/5]).
 
 %%----------------------------------------------------------------------------
 %% Definitions:
@@ -158,7 +143,7 @@
 %% The conversion from alphas to betas is also chunked, but only to
 %% ensure no more than ?IO_BATCH_SIZE alphas are converted to betas at
 %% any one time. This further smooths the effects of changes to the
-%% target_ram_item_count and ensures the queue remains responsive
+%% target_ram_count and ensures the queue remains responsive
 %% even when there is a large amount of IO work to do. The
 %% idle_timeout callback is utilised to ensure that conversions are
 %% done as promptly as possible whilst ensuring the queue remains
@@ -256,18 +241,21 @@
           len,
           persistent_count,
 
-          target_ram_item_count,
+          target_ram_count,
           ram_msg_count,
           ram_msg_count_prev,
           ram_ack_count_prev,
           ram_index_count,
           out_counter,
           in_counter,
+          rates,
+          msgs_on_disk,
+          msg_indices_on_disk,
+          unconfirmed,
           ack_out_counter,
           ack_in_counter,
-          rates,
           ack_rates
-         }).
+        }).
 
 -record(rates, { egress, ingress, avg_egress, avg_ingress, timestamp }).
 
@@ -293,12 +281,11 @@
 -record(sync, { acks_persistent, acks_all, pubs, funs }).
 
 %% When we discover, on publish, that we should write some indices to
-%% disk for some betas, the RAM_INDEX_BATCH_SIZE sets the number of
-%% betas that we must be due to write indices for before we do any
-%% work at all. This is both a minimum and a maximum - we don't write
-%% fewer than RAM_INDEX_BATCH_SIZE indices out in one go, and we don't
-%% write more - we can always come back on the next publish to do
-%% more.
+%% disk for some betas, the IO_BATCH_SIZE sets the number of betas
+%% that we must be due to write indices for before we do any work at
+%% all. This is both a minimum and a maximum - we don't write fewer
+%% than IO_BATCH_SIZE indices out in one go, and we don't write more -
+%% we can always come back on the next publish to do more.
 -define(IO_BATCH_SIZE, 64).
 -define(PERSISTENT_MSG_STORE, msg_store_persistent).
 -define(TRANSIENT_MSG_STORE,  msg_store_transient).
@@ -311,7 +298,7 @@
 
 -type(timestamp() :: {non_neg_integer(), non_neg_integer(), non_neg_integer()}).
 -type(seq_id()  :: non_neg_integer()).
--type(ack()     :: seq_id() | 'blank_ack').
+-type(ack()     :: seq_id()).
 
 -type(rates() :: #rates { egress      :: {timestamp(), non_neg_integer()},
                           ingress     :: {timestamp(), non_neg_integer()},
@@ -320,7 +307,7 @@
                           timestamp   :: timestamp() }).
 
 -type(delta() :: #delta { start_seq_id :: non_neg_integer(),
-                          count        :: non_neg_integer (),
+                          count        :: non_neg_integer(),
                           end_seq_id   :: non_neg_integer() }).
 
 -type(sync() :: #sync { acks_persistent :: [[seq_id()]],
@@ -348,15 +335,18 @@
              persistent_count      :: non_neg_integer(),
 
              transient_threshold   :: non_neg_integer(),
-             target_ram_item_count :: non_neg_integer() | 'infinity',
+             target_ram_count      :: non_neg_integer() | 'infinity',
              ram_msg_count         :: non_neg_integer(),
              ram_msg_count_prev    :: non_neg_integer(),
              ram_index_count       :: non_neg_integer(),
              out_counter           :: non_neg_integer(),
              in_counter            :: non_neg_integer(),
+             rates                 :: rates(),
+             msgs_on_disk          :: gb_set(),
+             msg_indices_on_disk   :: gb_set(),
+             unconfirmed           :: gb_set(),
              ack_out_counter       :: non_neg_integer(),
              ack_in_counter        :: non_neg_integer(),
-             rates                 :: rates(),
              ack_rates             :: rates() }).
 
 -include("rabbit_backing_queue_spec.hrl").
@@ -403,16 +393,25 @@ stop_msg_store() ->
     ok = rabbit_sup:stop_child(?PERSISTENT_MSG_STORE),
     ok = rabbit_sup:stop_child(?TRANSIENT_MSG_STORE).
 
-init(QueueName, IsDurable, false) ->
-    IndexState = rabbit_queue_index:init(QueueName),
+init(QueueName, IsDurable, Recover) ->
+    Self = self(),
+    init(QueueName, IsDurable, Recover,
+         fun (Guids, ActionTaken) ->
+                 msgs_written_to_disk(Self, Guids, ActionTaken)
+         end,
+         fun (Guids) -> msg_indices_written_to_disk(Self, Guids) end).
+
+init(QueueName, IsDurable, false, MsgOnDiskFun, MsgIdxOnDiskFun) ->
+    IndexState = rabbit_queue_index:init(QueueName, MsgIdxOnDiskFun),
     init(IsDurable, IndexState, 0, [],
          case IsDurable of
-             true  -> msg_store_client_init(?PERSISTENT_MSG_STORE);
+             true  -> msg_store_client_init(?PERSISTENT_MSG_STORE,
+                                            MsgOnDiskFun);
              false -> undefined
          end,
-         msg_store_client_init(?TRANSIENT_MSG_STORE));
+         msg_store_client_init(?TRANSIENT_MSG_STORE, undefined));
 
-init(QueueName, true, true) ->
+init(QueueName, true, true, MsgOnDiskFun, MsgIdxOnDiskFun) ->
     Terms = rabbit_queue_index:shutdown_terms(QueueName),
     {PRef, TRef, Terms1} =
         case [persistent_ref, transient_ref] -- proplists:get_keys(Terms) of
@@ -421,17 +420,18 @@ init(QueueName, true, true) ->
                    Terms};
             _  -> {rabbit_guid:guid(), rabbit_guid:guid(), []}
         end,
-    PersistentClient = rabbit_msg_store:client_init(?PERSISTENT_MSG_STORE,
-                                                    PRef),
-    TransientClient  = rabbit_msg_store:client_init(?TRANSIENT_MSG_STORE,
-                                                    TRef),
+    PersistentClient = msg_store_client_init(?PERSISTENT_MSG_STORE, PRef,
+                                             MsgOnDiskFun),
+    TransientClient  = msg_store_client_init(?TRANSIENT_MSG_STORE, TRef,
+                                             undefined),
     {DeltaCount, IndexState} =
         rabbit_queue_index:recover(
           QueueName, Terms1,
           rabbit_msg_store:successfully_recovered_state(?PERSISTENT_MSG_STORE),
           fun (Guid) ->
                   rabbit_msg_store:contains(Guid, PersistentClient)
-          end),
+          end,
+          MsgIdxOnDiskFun),
     init(true, IndexState, DeltaCount, Terms1,
          PersistentClient, TransientClient).
 
@@ -505,27 +505,34 @@ publish(Msg, MsgProps, State) ->
     {_SeqId, State1} = publish(Msg, MsgProps, false, false, State),
     a(reduce_memory_use(State1)).
 
-publish_delivered(false, _Msg, _MsgProps, State = #vqstate { len = 0 }) ->
-    {blank_ack, a(State)};
-publish_delivered(true, Msg = #basic_message { is_persistent = IsPersistent },
-                  MsgProps,
+publish_delivered(false, #basic_message { guid = Guid },
+                  _MsgProps, State = #vqstate { len = 0 }) ->
+    blind_confirm(self(), gb_sets:singleton(Guid)),
+    {undefined, a(State)};
+publish_delivered(true, Msg = #basic_message { is_persistent = IsPersistent,
+                                               guid = Guid },
+                  MsgProps = #message_properties {
+                    needs_confirming = NeedsConfirming },
                   State = #vqstate { len              = 0,
                                      next_seq_id      = SeqId,
                                      out_counter      = OutCount,
                                      in_counter       = InCount,
                                      persistent_count = PCount,
-                                     durable          = IsDurable }) ->
+                                     durable          = IsDurable,
+                                     unconfirmed      = UC }) ->
     IsPersistent1 = IsDurable andalso IsPersistent,
     MsgStatus = (msg_status(IsPersistent1, SeqId, Msg, MsgProps))
         #msg_status { is_delivered = true },
     {MsgStatus1, State1} = maybe_write_to_disk(false, false, MsgStatus, State),
     State2 = record_pending_ack(m(MsgStatus1), State1),
     PCount1 = PCount + one_if(IsPersistent1),
+    UC1 = gb_sets_maybe_insert(NeedsConfirming, Guid, UC),
     {SeqId, a(reduce_memory_use(
                 State2 #vqstate { next_seq_id      = SeqId    + 1,
                                   out_counter      = OutCount + 1,
                                   in_counter       = InCount  + 1,
-                                  persistent_count = PCount1 }))}.
+                                  persistent_count = PCount1,
+                                  unconfirmed      = UC1 }))}.
 
 dropwhile(Pred, State) ->
     {_OkOrEmpty, State1} = dropwhile1(Pred, State),
@@ -620,7 +627,7 @@ internal_fetch(AckRequired, MsgStatus = #msg_status {
                                             MsgStatus #msg_status {
                                               is_delivered = true }, State),
                                  {SeqId, StateN};
-                        false -> {blank_ack, State}
+                        false -> {undefined, State}
                     end,
 
     PCount1 = PCount - one_if(IsPersistent andalso not AckRequired),
@@ -636,7 +643,7 @@ internal_fetch(AckRequired, MsgStatus = #msg_status {
 
 ack(AckTags, State) ->
     a(ack(fun msg_store_remove/3,
-          fun (_AckEntry, State1) -> State1 end,
+          fun (_, State0) -> State0 end,
           AckTags, State)).
 
 tx_publish(Txn, Msg = #basic_message { is_persistent = IsPersistent }, MsgProps,
@@ -687,10 +694,14 @@ tx_commit(Txn, Fun, MsgPropsFun,
        end)}.
 
 requeue(AckTags, MsgPropsFun, State) ->
+    MsgPropsFun1 = fun (MsgProps) ->
+                           (MsgPropsFun(MsgProps)) #message_properties {
+                             needs_confirming = false }
+                   end,
     a(reduce_memory_use(
         ack(fun msg_store_release/3,
             fun (#msg_status { msg = Msg, msg_props = MsgProps }, State1) ->
-                    {_SeqId, State2} = publish(Msg, MsgPropsFun(MsgProps),
+                    {_SeqId, State2} = publish(Msg, MsgPropsFun1(MsgProps),
                                                true, false, State1),
                     State2;
                 ({IsPersistent, Guid, MsgProps}, State1) ->
@@ -698,7 +709,7 @@ requeue(AckTags, MsgPropsFun, State) ->
                     {{ok, Msg = #basic_message{}}, MSCState1} =
                         msg_store_read(MSCState, IsPersistent, Guid),
                     State2 = State1 #vqstate { msg_store_clients = MSCState1 },
-                    {_SeqId, State3} = publish(Msg, MsgPropsFun(MsgProps),
+                    {_SeqId, State3} = publish(Msg, MsgPropsFun1(MsgProps),
                                                true, true, State2),
                     State3
             end,
@@ -708,26 +719,24 @@ len(#vqstate { len = Len }) -> Len.
 
 is_empty(State) -> 0 == len(State).
 
-set_ram_duration_target(DurationTarget,
-                        State = #vqstate {
-                          rates =
-                              #rates { avg_egress  = AvgEgressRate,
-                                       avg_ingress = AvgIngressRate },
-                          ack_rates =
-                              #rates { avg_egress  = AvgAckEgressRate,
-                                       avg_ingress = AvgAckIngressRate },
-                          target_ram_item_count = TargetRamItemCount }) ->
+set_ram_duration_target(
+  DurationTarget, State = #vqstate {
+                    rates     = #rates { avg_egress  = AvgEgressRate,
+                                         avg_ingress = AvgIngressRate },
+                    ack_rates = #rates { avg_egress  = AvgAckEgressRate,
+                                         avg_ingress = AvgAckIngressRate },
+                    target_ram_count = TargetRamCount }) ->
     Rate =
         AvgEgressRate + AvgIngressRate + AvgAckEgressRate + AvgAckIngressRate,
-    TargetRamItemCount1 =
+    TargetRamCount1 =
         case DurationTarget of
             infinity  -> infinity;
             _         -> trunc(DurationTarget * Rate) %% msgs = sec * msgs/sec
         end,
-    State1 = State #vqstate { target_ram_item_count = TargetRamItemCount1 },
-    a(case TargetRamItemCount1 == infinity orelse
-          (TargetRamItemCount =/= infinity andalso
-           TargetRamItemCount1 >= TargetRamItemCount) of
+    State1 = State #vqstate { target_ram_count = TargetRamCount1 },
+    a(case TargetRamCount1 == infinity orelse
+          (TargetRamCount =/= infinity andalso
+           TargetRamCount1 >= TargetRamCount) of
           true  -> State1;
           false -> reduce_memory_use(State1)
       end).
@@ -788,55 +797,59 @@ ram_duration(State = #vqstate {
                  ram_msg_count_prev = RamMsgCount,
                  ram_ack_count_prev = RamAckCount }}.
 
-needs_idle_timeout(State = #vqstate { on_sync = ?BLANK_SYNC }) ->
-    {Res, _State} = reduce_memory_use(fun (_Quota, State1) -> {0, State1} end,
-                                      fun (_Quota, State1) -> State1 end,
-                                      fun (State1)         -> State1 end,
-                                      fun (_Quota, State1) -> {0, State1} end,
-                                      State),
-    Res;
-needs_idle_timeout(_State) ->
-    true.
+needs_idle_timeout(State = #vqstate { on_sync = OnSync }) ->
+    case {OnSync, needs_index_sync(State)} of
+        {?BLANK_SYNC, false} ->
+            {Res, _State} = reduce_memory_use(
+                              fun (_Quota, State1) -> {0, State1} end,
+                              fun (_Quota, State1) -> State1 end,
+                              fun (State1)         -> State1 end,
+                              fun (_Quota, State1) -> {0, State1} end,
+                              State),
+            Res;
+        _ ->
+            true
+    end.
 
-idle_timeout(State) -> a(reduce_memory_use(tx_commit_index(State))).
+idle_timeout(State) ->
+    a(reduce_memory_use(confirm_commit_index(tx_commit_index(State)))).
 
 handle_pre_hibernate(State = #vqstate { index_state = IndexState }) ->
     State #vqstate { index_state = rabbit_queue_index:flush(IndexState) }.
 
-status(#vqstate { q1 = Q1, q2 = Q2, delta = Delta, q3 = Q3, q4 = Q4,
-                  len                   = Len,
-                  pending_ack           = PA,
-                  ram_ack_index         = RAI,
-                  on_sync               = #sync { funs = From },
-                  target_ram_item_count = TargetRamItemCount,
-                  ram_msg_count         = RamMsgCount,
-                  ram_index_count       = RamIndexCount,
-                  next_seq_id           = NextSeqId,
-                  persistent_count      = PersistentCount,
-                  rates                 = #rates {
-                    avg_egress  = AvgEgressRate,
-                    avg_ingress = AvgIngressRate },
-                  ack_rates             = #rates {
-                    avg_egress  = AvgAckEgressRate,
-                    avg_ingress = AvgAckIngressRate } }) ->
-    [ {q1                    , queue:len(Q1)},
-      {q2                    , bpqueue:len(Q2)},
-      {delta                 , Delta},
-      {q3                    , bpqueue:len(Q3)},
-      {q4                    , queue:len(Q4)},
-      {len                   , Len},
-      {pending_acks          , dict:size(PA)},
-      {outstanding_txns      , length(From)},
-      {target_ram_item_count , TargetRamItemCount},
-      {ram_msg_count         , RamMsgCount},
-      {ram_ack_count         , gb_trees:size(RAI)},
-      {ram_index_count       , RamIndexCount},
-      {next_seq_id           , NextSeqId},
-      {persistent_count      , PersistentCount},
-      {avg_ingress_rate      , AvgIngressRate},
-      {avg_egress_rate       , AvgEgressRate},
-      {avg_ack_ingress_rate  , AvgAckIngressRate},
-      {avg_ack_egress_rate   , AvgAckEgressRate} ].
+status(#vqstate {
+          q1 = Q1, q2 = Q2, delta = Delta, q3 = Q3, q4 = Q4,
+          len              = Len,
+          pending_ack      = PA,
+          ram_ack_index    = RAI,
+          on_sync          = #sync { funs = From },
+          target_ram_count = TargetRamCount,
+          ram_msg_count    = RamMsgCount,
+          ram_index_count  = RamIndexCount,
+          next_seq_id      = NextSeqId,
+          persistent_count = PersistentCount,
+          rates            = #rates { avg_egress  = AvgEgressRate,
+                                      avg_ingress = AvgIngressRate },
+          ack_rates        = #rates { avg_egress  = AvgAckEgressRate,
+                                      avg_ingress = AvgAckIngressRate } }) ->
+    [ {q1                  , queue:len(Q1)},
+      {q2                  , bpqueue:len(Q2)},
+      {delta               , Delta},
+      {q3                  , bpqueue:len(Q3)},
+      {q4                  , queue:len(Q4)},
+      {len                 , Len},
+      {pending_acks        , dict:size(PA)},
+      {outstanding_txns    , length(From)},
+      {target_ram_count    , TargetRamCount},
+      {ram_msg_count       , RamMsgCount},
+      {ram_ack_count       , gb_trees:size(RAI)},
+      {ram_index_count     , RamIndexCount},
+      {next_seq_id         , NextSeqId},
+      {persistent_count    , PersistentCount},
+      {avg_ingress_rate    , AvgIngressRate},
+      {avg_egress_rate     , AvgEgressRate},
+      {avg_ack_ingress_rate, AvgAckIngressRate},
+      {avg_ack_egress_rate , AvgAckEgressRate} ].
 
 %%----------------------------------------------------------------------------
 %% Minor helpers
@@ -882,6 +895,10 @@ one_if(false) -> 0.
 cons_if(true,   E, L) -> [E | L];
 cons_if(false, _E, L) -> L.
 
+gb_sets_maybe_insert(false, _Val, Set) -> Set;
+%% when requeueing, we re-add a guid to the unconfirmed set
+gb_sets_maybe_insert(true,  Val,  Set) -> gb_sets:add(Val, Set).
+
 msg_status(IsPersistent, SeqId, Msg = #basic_message { guid = Guid },
            MsgProps) ->
     #msg_status { seq_id = SeqId, guid = Guid, msg = Msg,
@@ -903,8 +920,13 @@ with_immutable_msg_store_state(MSCState, IsPersistent, Fun) ->
                                            end),
     Res.
 
-msg_store_client_init(MsgStore) ->
-    rabbit_msg_store:client_init(MsgStore, rabbit_guid:guid()).
+msg_store_client_init(MsgStore, MsgOnDiskFun) ->
+    msg_store_client_init(MsgStore, rabbit_guid:guid(), MsgOnDiskFun).
+
+msg_store_client_init(MsgStore, Ref, MsgOnDiskFun) ->
+    rabbit_msg_store:client_init(
+      MsgStore, Ref, MsgOnDiskFun,
+      msg_store_close_fds_fun(MsgStore =:= ?PERSISTENT_MSG_STORE)).
 
 msg_store_write(MSCState, IsPersistent, Guid, Msg) ->
     with_immutable_msg_store_state(
@@ -931,6 +953,23 @@ msg_store_sync(MSCState, IsPersistent, Guids, Callback) ->
       MSCState, IsPersistent,
       fun (MSCState1) -> rabbit_msg_store:sync(Guids, Callback, MSCState1) end).
 
+msg_store_close_fds(MSCState, IsPersistent) ->
+    with_msg_store_state(
+      MSCState, IsPersistent,
+      fun (MSCState1) -> rabbit_msg_store:close_all_indicated(MSCState1) end).
+
+msg_store_close_fds_fun(IsPersistent) ->
+    Self = self(),
+    fun () ->
+            rabbit_amqqueue:maybe_run_queue_via_backing_queue_async(
+              Self,
+              fun (State = #vqstate { msg_store_clients = MSCState }) ->
+                      {ok, MSCState1} =
+                          msg_store_close_fds(MSCState, IsPersistent),
+                      {[], State #vqstate { msg_store_clients = MSCState1 }}
+              end)
+    end.
+
 maybe_write_delivered(false, _SeqId, IndexState) ->
     IndexState;
 maybe_write_delivered(true, SeqId, IndexState) ->
@@ -1026,34 +1065,37 @@ init(IsDurable, IndexState, DeltaCount, Terms,
             end,
     Now = now(),
     State = #vqstate {
-      q1                    = queue:new(),
-      q2                    = bpqueue:new(),
-      delta                 = Delta,
-      q3                    = bpqueue:new(),
-      q4                    = queue:new(),
-      next_seq_id           = NextSeqId,
-      pending_ack           = dict:new(),
-      ram_ack_index         = gb_trees:empty(),
-      index_state           = IndexState1,
-      msg_store_clients     = {PersistentClient, TransientClient},
-      on_sync               = ?BLANK_SYNC,
-      durable               = IsDurable,
-      transient_threshold   = NextSeqId,
-
-      len                   = DeltaCount1,
-      persistent_count      = DeltaCount1,
-
-      target_ram_item_count = infinity,
-      ram_msg_count         = 0,
-      ram_msg_count_prev    = 0,
-      ram_ack_count_prev    = 0,
-      ram_index_count       = 0,
-      out_counter           = 0,
-      in_counter            = 0,
-      ack_out_counter       = 0,
-      ack_in_counter        = 0,
-      rates                 = blank_rate(Now, DeltaCount1),
-      ack_rates             = blank_rate(Now, 0) },
+      q1                  = queue:new(),
+      q2                  = bpqueue:new(),
+      delta               = Delta,
+      q3                  = bpqueue:new(),
+      q4                  = queue:new(),
+      next_seq_id         = NextSeqId,
+      pending_ack         = dict:new(),
+      ram_ack_index       = gb_trees:empty(),
+      index_state         = IndexState1,
+      msg_store_clients   = {PersistentClient, TransientClient},
+      on_sync             = ?BLANK_SYNC,
+      durable             = IsDurable,
+      transient_threshold = NextSeqId,
+
+      len                 = DeltaCount1,
+      persistent_count    = DeltaCount1,
+
+      target_ram_count    = infinity,
+      ram_msg_count       = 0,
+      ram_msg_count_prev  = 0,
+      ram_ack_count_prev  = 0,
+      ram_index_count     = 0,
+      out_counter         = 0,
+      in_counter          = 0,
+      rates               = blank_rate(Now, DeltaCount1),
+      msgs_on_disk        = gb_sets:new(),
+      msg_indices_on_disk = gb_sets:new(),
+      unconfirmed         = gb_sets:new(),
+      ack_out_counter     = 0,
+      ack_in_counter      = 0,
+      ack_rates           = blank_rate(Now, 0) },
     a(maybe_deltas_to_betas(State)).
 
 blank_rate(Timestamp, IngressLength) ->
@@ -1066,9 +1108,9 @@ blank_rate(Timestamp, IngressLength) ->
 msg_store_callback(PersistentGuids, Pubs, AckTags, Fun, MsgPropsFun) ->
     Self = self(),
     F = fun () -> rabbit_amqqueue:maybe_run_queue_via_backing_queue(
-                    Self, fun (StateN) -> tx_commit_post_msg_store(
-                                            true, Pubs, AckTags,
-                                            Fun, MsgPropsFun, StateN)
+                    Self, fun (StateN) -> {[], tx_commit_post_msg_store(
+                                                 true, Pubs, AckTags,
+                                                 Fun, MsgPropsFun, StateN)}
                           end)
         end,
     fun () -> spawn(fun () -> ok = rabbit_misc:with_exit_handler(
@@ -1079,7 +1121,7 @@ msg_store_callback(PersistentGuids, Pubs, AckTags, Fun, MsgPropsFun) ->
     end.
 
 remove_persistent_messages(Guids) ->
-    PersistentClient = msg_store_client_init(?PERSISTENT_MSG_STORE),
+    PersistentClient = msg_store_client_init(?PERSISTENT_MSG_STORE, undefined),
     ok = rabbit_msg_store:remove(Guids, PersistentClient),
     rabbit_msg_store:client_delete_and_terminate(PersistentClient).
 
@@ -1195,15 +1237,17 @@ sum_guids_by_store_to_len(LensByStore, GuidsByStore) ->
 %% Internal gubbins for publishing
 %%----------------------------------------------------------------------------
 
-publish(Msg = #basic_message { is_persistent = IsPersistent },
-        MsgProps, IsDelivered, MsgOnDisk,
+publish(Msg = #basic_message { is_persistent = IsPersistent, guid = Guid },
+        MsgProps = #message_properties { needs_confirming = NeedsConfirming },
+        IsDelivered, MsgOnDisk,
         State = #vqstate { q1 = Q1, q3 = Q3, q4 = Q4,
                            next_seq_id      = SeqId,
                            len              = Len,
                            in_counter       = InCount,
                            persistent_count = PCount,
                            durable          = IsDurable,
-                           ram_msg_count    = RamMsgCount }) ->
+                           ram_msg_count    = RamMsgCount,
+                           unconfirmed      = UC }) ->
     IsPersistent1 = IsDurable andalso IsPersistent,
     MsgStatus = (msg_status(IsPersistent1, SeqId, Msg, MsgProps))
         #msg_status { is_delivered = IsDelivered, msg_on_disk = MsgOnDisk},
@@ -1213,11 +1257,13 @@ publish(Msg = #basic_message { is_persistent = IsPersistent },
                  true  -> State1 #vqstate { q4 = queue:in(m(MsgStatus1), Q4) }
              end,
     PCount1 = PCount + one_if(IsPersistent1),
+    UC1 = gb_sets_maybe_insert(NeedsConfirming, Guid, UC),
     {SeqId, State2 #vqstate { next_seq_id      = SeqId   + 1,
                               len              = Len     + 1,
                               in_counter       = InCount + 1,
                               persistent_count = PCount1,
-                              ram_msg_count    = RamMsgCount + 1}}.
+                              ram_msg_count    = RamMsgCount + 1,
+                              unconfirmed      = UC1 }}.
 
 maybe_write_msg_to_disk(_Force, MsgStatus = #msg_status {
                                   msg_on_disk = true }, _MSCState) ->
@@ -1276,10 +1322,8 @@ record_pending_ack(#msg_status { seq_id        = SeqId,
                                       ack_in_counter  = AckInCount}) ->
     {AckEntry, RAI1} =
         case MsgOnDisk of
-            true ->
-                {{IsPersistent, Guid, MsgProps}, RAI};
-            false ->
-                {MsgStatus, gb_trees:insert(SeqId, Guid, RAI)}
+            true  -> {{IsPersistent, Guid, MsgProps}, RAI};
+            false -> {MsgStatus, gb_trees:insert(SeqId, Guid, RAI)}
         end,
     PA1 = dict:store(SeqId, AckEntry, PA),
     State #vqstate { pending_ack    = PA1,
@@ -1290,8 +1334,8 @@ remove_pending_ack(KeepPersistent,
                    State = #vqstate { pending_ack       = PA,
                                       index_state       = IndexState,
                                       msg_store_clients = MSCState }) ->
-    {SeqIds, GuidsByStore} = dict:fold(fun accumulate_ack/3,
-                                       {[], orddict:new()}, PA),
+    {PersistentSeqIds, GuidsByStore} =
+        dict:fold(fun accumulate_ack/3, accumulate_ack_init(), PA),
     State1 = State #vqstate { pending_ack   = dict:new(),
                               ram_ack_index = gb_trees:empty() },
     case KeepPersistent of
@@ -1301,18 +1345,17 @@ remove_pending_ack(KeepPersistent,
                                                           Guids),
                                     State1
                  end;
-        false -> IndexState1 = rabbit_queue_index:ack(SeqIds, IndexState),
-                 ok = orddict:fold(
-                        fun (IsPersistent, Guids, ok) ->
-                                msg_store_remove(MSCState, IsPersistent, Guids)
-                        end, ok, GuidsByStore),
+        false -> IndexState1 =
+                     rabbit_queue_index:ack(PersistentSeqIds, IndexState),
+                 [ok = msg_store_remove(MSCState, IsPersistent, Guids)
+                  || {IsPersistent, Guids} <- orddict:to_list(GuidsByStore)],
                  State1 #vqstate { index_state = IndexState1 }
     end.
 
 ack(_MsgStoreFun, _Fun, [], State) ->
     State;
 ack(MsgStoreFun, Fun, AckTags, State) ->
-    {{SeqIds, GuidsByStore},
+    {{PersistentSeqIds, GuidsByStore},
      State1 = #vqstate { index_state       = IndexState,
                          msg_store_clients = MSCState,
                          persistent_count  = PCount,
@@ -1326,24 +1369,27 @@ ack(MsgStoreFun, Fun, AckTags, State) ->
                                    pending_ack   = dict:erase(SeqId, PA),
                                    ram_ack_index =
                                        gb_trees:delete_any(SeqId, RAI)})}
-          end, {{[], orddict:new()}, State}, AckTags),
-    IndexState1 = rabbit_queue_index:ack(SeqIds, IndexState),
-    ok = orddict:fold(fun (IsPersistent, Guids, ok) ->
-                              MsgStoreFun(MSCState, IsPersistent, Guids)
-                      end, ok, GuidsByStore),
+          end, {accumulate_ack_init(), State}, AckTags),
+    IndexState1 = rabbit_queue_index:ack(PersistentSeqIds, IndexState),
+    [ok = MsgStoreFun(MSCState, IsPersistent, Guids)
+     || {IsPersistent, Guids} <- orddict:to_list(GuidsByStore)],
     PCount1 = PCount - find_persistent_count(sum_guids_by_store_to_len(
                                                orddict:new(), GuidsByStore)),
     State1 #vqstate { index_state      = IndexState1,
                       persistent_count = PCount1,
                       ack_out_counter  = AckOutCount + length(AckTags) }.
 
+accumulate_ack_init() -> {[], orddict:new()}.
+
 accumulate_ack(_SeqId, #msg_status { is_persistent = false, %% ASSERTIONS
                                      msg_on_disk   = false,
-                                     index_on_disk = false }, Acc) ->
-    Acc;
-accumulate_ack(SeqId, {IsPersistent, Guid, _MsgProps}, {SeqIdsAcc, Dict}) ->
-    {cons_if(IsPersistent, SeqId, SeqIdsAcc),
-     rabbit_misc:orddict_cons(IsPersistent, Guid, Dict)}.
+                                     index_on_disk = false },
+              {PersistentSeqIdsAcc, GuidsByStore}) ->
+    {PersistentSeqIdsAcc, GuidsByStore};
+accumulate_ack(SeqId, {IsPersistent, Guid, _MsgProps},
+               {PersistentSeqIdsAcc, GuidsByStore}) ->
+    {cons_if(IsPersistent, SeqId, PersistentSeqIdsAcc),
+     rabbit_misc:orddict_cons(IsPersistent, Guid, GuidsByStore)}.
 
 find_persistent_count(LensByStore) ->
     case orddict:find(true, LensByStore) of
@@ -1352,6 +1398,72 @@ find_persistent_count(LensByStore) ->
     end.
 
 %%----------------------------------------------------------------------------
+%% Internal plumbing for confirms (aka publisher acks)
+%%----------------------------------------------------------------------------
+
+confirm_commit_index(State = #vqstate { index_state = IndexState }) ->
+    case needs_index_sync(State) of
+        true  -> State #vqstate {
+                   index_state = rabbit_queue_index:sync(IndexState) };
+        false -> State
+    end.
+
+remove_confirms(GuidSet, State = #vqstate { msgs_on_disk        = MOD,
+                                            msg_indices_on_disk = MIOD,
+                                            unconfirmed         = UC }) ->
+    State #vqstate { msgs_on_disk        = gb_sets:difference(MOD,  GuidSet),
+                     msg_indices_on_disk = gb_sets:difference(MIOD, GuidSet),
+                     unconfirmed         = gb_sets:difference(UC,   GuidSet) }.
+
+needs_index_sync(#vqstate { msg_indices_on_disk = MIOD,
+                            unconfirmed = UC }) ->
+    %% If UC is empty then by definition, MIOD and MOD are also empty
+    %% and there's nothing that can be pending a sync.
+
+    %% If UC is not empty, then we want to find is_empty(UC - MIOD),
+    %% but the subtraction can be expensive. Thus instead, we test to
+    %% see if UC is a subset of MIOD. This can only be the case if
+    %% MIOD == UC, which would indicate that every message in UC is
+    %% also in MIOD and is thus _all_ pending on a msg_store sync, not
+    %% on a qi sync. Thus the negation of this is sufficient. Because
+    %% is_subset is short circuiting, this is more efficient than the
+    %% subtraction.
+    not (gb_sets:is_empty(UC) orelse gb_sets:is_subset(UC, MIOD)).
+
+msgs_confirmed(GuidSet, State) ->
+    {gb_sets:to_list(GuidSet), remove_confirms(GuidSet, State)}.
+
+blind_confirm(QPid, GuidSet) ->
+    rabbit_amqqueue:maybe_run_queue_via_backing_queue_async(
+      QPid, fun (State) -> msgs_confirmed(GuidSet, State) end).
+
+msgs_written_to_disk(QPid, GuidSet, removed) ->
+    blind_confirm(QPid, GuidSet);
+msgs_written_to_disk(QPid, GuidSet, written) ->
+    rabbit_amqqueue:maybe_run_queue_via_backing_queue_async(
+      QPid, fun (State = #vqstate { msgs_on_disk        = MOD,
+                                    msg_indices_on_disk = MIOD,
+                                    unconfirmed         = UC }) ->
+                    msgs_confirmed(gb_sets:intersection(GuidSet, MIOD),
+                                   State #vqstate {
+                                     msgs_on_disk =
+                                         gb_sets:intersection(
+                                           gb_sets:union(MOD, GuidSet), UC) })
+            end).
+
+msg_indices_written_to_disk(QPid, GuidSet) ->
+    rabbit_amqqueue:maybe_run_queue_via_backing_queue_async(
+      QPid, fun (State = #vqstate { msgs_on_disk        = MOD,
+                                    msg_indices_on_disk = MIOD,
+                                    unconfirmed         = UC }) ->
+                    msgs_confirmed(gb_sets:intersection(GuidSet, MOD),
+                                   State #vqstate {
+                                     msg_indices_on_disk =
+                                         gb_sets:intersection(
+                                           gb_sets:union(MIOD, GuidSet), UC) })
+            end).
+
+%%----------------------------------------------------------------------------
 %% Phase changes
 %%----------------------------------------------------------------------------
 
@@ -1364,7 +1476,7 @@ find_persistent_count(LensByStore) ->
 %% though the conversion function for that is called as necessary. The
 %% reason is twofold. Firstly, this is safe because the conversion is
 %% only ever necessary just after a transition to a
-%% target_ram_item_count of zero or after an incremental alpha->beta
+%% target_ram_count of zero or after an incremental alpha->beta
 %% conversion. In the former case the conversion is performed straight
 %% away (i.e. any betas present at the time are converted to deltas),
 %% and in the latter case the need for a conversion is flagged up
@@ -1375,51 +1487,41 @@ find_persistent_count(LensByStore) ->
 %% perpetually reporting the need for a conversion when no such
 %% conversion is needed. That in turn could cause an infinite loop.
 reduce_memory_use(_AlphaBetaFun, _BetaGammaFun, _BetaDeltaFun, _AckFun,
-                  State = #vqstate {target_ram_item_count = infinity}) ->
+                  State = #vqstate {target_ram_count = infinity}) ->
     {false, State};
 reduce_memory_use(AlphaBetaFun, BetaGammaFun, BetaDeltaFun, AckFun,
                   State = #vqstate {
-                    ram_ack_index         = RamAckIndex,
-                    ram_msg_count         = RamMsgCount,
-                    target_ram_item_count = TargetRamItemCount,
-                    rates                 = #rates {
-                      avg_ingress = AvgIngress,
-                      avg_egress  = AvgEgress },
-                    ack_rates             = #rates {
-                      avg_ingress = AvgAckIngress,
-                      avg_egress  = AvgAckEgress } }) ->
+                    ram_ack_index    = RamAckIndex,
+                    ram_msg_count    = RamMsgCount,
+                    target_ram_count = TargetRamCount,
+                    rates            = #rates { avg_ingress = AvgIngress,
+                                                avg_egress  = AvgEgress },
+                    ack_rates        = #rates { avg_ingress = AvgAckIngress,
+                                                avg_egress  = AvgAckEgress }
+                   }) ->
 
     {Reduce, State1} =
         case chunk_size(RamMsgCount + gb_trees:size(RamAckIndex),
-                        TargetRamItemCount) of
-            0 ->
-                {false, State};
-            S1 ->
-                ReduceFuns =
-                    case (AvgAckIngress - AvgAckEgress) >
-                        (AvgIngress - AvgEgress) of
-                        true ->
-                            %% ACKs are growing faster than the queue,
-                            %% push messages from there first.
-                            [AckFun, AlphaBetaFun];
-                        false ->
-                            %% The queue is growing faster than the
-                            %% acks, push queue messages first.
-                            [AlphaBetaFun, AckFun]
-                    end,
-                {_, State2} =
-                    %% Both reduce functions get a chance to reduce
-                    %% memory. The second may very well get a quota of
-                    %% 0 if the first function managed to push out the
-                    %% maximum number of messages.
-                    lists:foldl(
-                      fun (ReduceFun, {QuotaN, StateN}) ->
-                              ReduceFun(QuotaN, StateN)
-                      end, {S1, State}, ReduceFuns),
-                {true, State2}
+                        TargetRamCount) of
+            0  -> {false, State};
+            %% Reduce memory of pending acks and alphas. The order is
+            %% determined based on which is growing faster. Whichever
+            %% comes second may very well get a quota of 0 if the
+            %% first manages to push out the max number of messages.
+            S1 -> {_, State2} =
+                      lists:foldl(fun (ReduceFun, {QuotaN, StateN}) ->
+                                          ReduceFun(QuotaN, StateN)
+                                  end,
+                                  {S1, State},
+                                  case (AvgAckIngress - AvgAckEgress) >
+                                      (AvgIngress - AvgEgress) of
+                                      true  -> [AckFun, AlphaBetaFun];
+                                      false -> [AlphaBetaFun, AckFun]
+                                  end),
+                  {true, State2}
         end,
 
-    case State1 #vqstate.target_ram_item_count of
+    case State1 #vqstate.target_ram_count of
         0 -> {Reduce, BetaDeltaFun(State1)};
         _ -> case chunk_size(State1 #vqstate.ram_index_count,
                              permitted_ram_index_count(State1)) of
@@ -1615,11 +1717,11 @@ maybe_push_q4_to_betas(Quota, State = #vqstate { q4 = Q4 }) ->
 
 maybe_push_alphas_to_betas(_Generator, _Consumer, Quota, _Q,
                            State = #vqstate {
-                             ram_msg_count         = RamMsgCount,
-                             target_ram_item_count = TargetRamItemCount })
+                             ram_msg_count    = RamMsgCount,
+                             target_ram_count = TargetRamCount })
   when Quota =:= 0 orelse
-       TargetRamItemCount =:= infinity orelse
-       TargetRamItemCount >= RamMsgCount ->
+       TargetRamCount =:= infinity orelse
+       TargetRamCount >= RamMsgCount ->
     {Quota, State};
 maybe_push_alphas_to_betas(Generator, Consumer, Quota, Q, State) ->
     case Generator(Q) of
diff --git a/src/rabbit_vhost.erl b/src/rabbit_vhost.erl
new file mode 100644
index 00000000..efebef06
--- /dev/null
+++ b/src/rabbit_vhost.erl
@@ -0,0 +1,106 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
+%%
+
+-module(rabbit_vhost).
+
+-include("rabbit.hrl").
+
+%%----------------------------------------------------------------------------
+
+-export([add/1, delete/1, exists/1, list/0, with/2]).
+
+-ifdef(use_specs).
+
+-spec(add/1 :: (rabbit_types:vhost()) -> 'ok').
+-spec(delete/1 :: (rabbit_types:vhost()) -> 'ok').
+-spec(exists/1 :: (rabbit_types:vhost()) -> boolean()).
+-spec(list/0 :: () -> [rabbit_types:vhost()]).
+-spec(with/2 :: (rabbit_types:vhost(), rabbit_misc:thunk(A)) -> A).
+
+-endif.
+
+%%----------------------------------------------------------------------------
+
+add(VHostPath) ->
+    R = rabbit_misc:execute_mnesia_transaction(
+          fun () ->
+                  case mnesia:wread({rabbit_vhost, VHostPath}) of
+                      []  -> ok = mnesia:write(rabbit_vhost,
+                                               #vhost{virtual_host = VHostPath},
+                                               write);
+                      [_] -> mnesia:abort({vhost_already_exists, VHostPath})
+                  end
+          end,
+          fun (ok, true) ->
+                  ok;
+              (ok, false) ->
+                  [rabbit_exchange:declare(
+                      rabbit_misc:r(VHostPath, exchange, Name),
+                      Type, true, false, false, []) ||
+                         {Name,Type} <-
+                             [{<<"">>,            direct},
+                              {<<"amq.direct">>,  direct},
+                              {<<"amq.topic">>,   topic},
+                              {<<"amq.match">>,   headers}, %% per 0-9-1 pdf
+                              {<<"amq.headers">>, headers}, %% per 0-9-1 xml
+                              {<<"amq.fanout">>,  fanout}]],
+                  ok
+          end),
+    rabbit_log:info("Added vhost ~p~n", [VHostPath]),
+    R.
+
+delete(VHostPath) ->
+    %% FIXME: We are forced to delete the queues and exchanges outside
+    %% the TX below. Queue deletion involves sending messages to the queue
+    %% process, which in turn results in further mnesia actions and
+    %% eventually the termination of that process. Exchange deletion causes
+    %% notifications which must be sent outside the TX
+    [{ok,_} = rabbit_amqqueue:delete(Q, false, false) ||
+        Q <- rabbit_amqqueue:list(VHostPath)],
+    [ok = rabbit_exchange:delete(Name, false) ||
+        #exchange{name = Name} <- rabbit_exchange:list(VHostPath)],
+    R = rabbit_misc:execute_mnesia_transaction(
+          with(VHostPath, fun () ->
+                                  ok = internal_delete(VHostPath)
+                          end)),
+    rabbit_log:info("Deleted vhost ~p~n", [VHostPath]),
+    R.
+
+internal_delete(VHostPath) ->
+    lists:foreach(
+      fun ({Username, _, _, _}) ->
+              ok = rabbit_auth_backend_internal:clear_permissions(Username,
+                                                                  VHostPath)
+      end,
+      rabbit_auth_backend_internal:list_vhost_permissions(VHostPath)),
+    ok = mnesia:delete({rabbit_vhost, VHostPath}),
+    ok.
+
+exists(VHostPath) ->
+    mnesia:dirty_read({rabbit_vhost, VHostPath}) /= [].
+
+list() ->
+    mnesia:dirty_all_keys(rabbit_vhost).
+
+with(VHostPath, Thunk) ->
+    fun () ->
+            case mnesia:read({rabbit_vhost, VHostPath}) of
+                [] ->
+                    mnesia:abort({no_such_vhost, VHostPath});
+                [_V] ->
+                    Thunk()
+            end
+    end.
diff --git a/src/rabbit_writer.erl b/src/rabbit_writer.erl
index 50bca390..eba86a55 100644
--- a/src/rabbit_writer.erl
+++ b/src/rabbit_writer.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(rabbit_writer).
@@ -34,12 +19,11 @@
 -include("rabbit_framing.hrl").
 
 -export([start/5, start_link/5, mainloop/2, mainloop1/2]).
--export([send_command/2, send_command/3, send_command_sync/2,
-         send_command_sync/3, send_command_and_notify/5]).
+-export([send_command/2, send_command/3,
+         send_command_sync/2, send_command_sync/3,
+         send_command_and_notify/4, send_command_and_notify/5]).
 -export([internal_send_command/4, internal_send_command/6]).
 
--import(gen_tcp).
-
 -record(wstate, {sock, channel, frame_max, protocol}).
 
 -define(HIBERNATE_AFTER, 5000).
@@ -66,6 +50,9 @@
 -spec(send_command_sync/3 ::
         (pid(), rabbit_framing:amqp_method_record(), rabbit_types:content())
         -> 'ok').
+-spec(send_command_and_notify/4 ::
+        (pid(), pid(), pid(), rabbit_framing:amqp_method_record())
+        -> 'ok').
 -spec(send_command_and_notify/5 ::
         (pid(), pid(), pid(), rabbit_framing:amqp_method_record(),
          rabbit_types:content())
@@ -130,6 +117,10 @@ handle_message({'$gen_call', From, {send_command_sync, MethodRecord, Content}},
     ok = internal_send_command_async(MethodRecord, Content, State),
     gen_server:reply(From, ok),
     State;
+handle_message({send_command_and_notify, QPid, ChPid, MethodRecord}, State) ->
+    ok = internal_send_command_async(MethodRecord, State),
+    rabbit_amqqueue:notify_sent(QPid, ChPid),
+    State;
 handle_message({send_command_and_notify, QPid, ChPid, MethodRecord, Content},
                State) ->
     ok = internal_send_command_async(MethodRecord, Content, State),
@@ -158,6 +149,10 @@ send_command_sync(W, MethodRecord) ->
 send_command_sync(W, MethodRecord, Content) ->
     call(W, {send_command_sync, MethodRecord, Content}).
 
+send_command_and_notify(W, Q, ChPid, MethodRecord) ->
+    W ! {send_command_and_notify, Q, ChPid, MethodRecord},
+    ok.
+
 send_command_and_notify(W, Q, ChPid, MethodRecord, Content) ->
     W ! {send_command_and_notify, Q, ChPid, MethodRecord, Content},
     ok.
@@ -170,7 +165,7 @@ call(Pid, Msg) ->
 
 %---------------------------------------------------------------------------
 
-assemble_frames(Channel, MethodRecord, Protocol) ->
+assemble_frame(Channel, MethodRecord, Protocol) ->
     ?LOGMESSAGE(out, Channel, MethodRecord, none),
     rabbit_binary_generator:build_simple_method_frame(
       Channel, MethodRecord, Protocol).
@@ -185,17 +180,34 @@ assemble_frames(Channel, MethodRecord, Content, FrameMax, Protocol) ->
                       Channel, Content, FrameMax, Protocol),
     [MethodFrame | ContentFrames].
 
+%% We optimise delivery of small messages. Content-bearing methods
+%% require at least three frames. Small messages always fit into
+%% that. We hand their frames to the Erlang network functions in one
+%% go, which may lead to somewhat more efficient processing in the
+%% runtime and a greater chance of coalescing into fewer TCP packets.
+%%
+%% By contrast, for larger messages, split across many frames, we want
+%% to allow interleaving of frames on different channels. Hence we
+%% hand them to the Erlang network functions one frame at a time.
+send_frames(Fun, Sock, Frames) when length(Frames) =< 3 ->
+    Fun(Sock, Frames);
+send_frames(Fun, Sock, Frames) ->
+    lists:foldl(fun (Frame,     ok) -> Fun(Sock, Frame);
+                    (_Frame, Other) -> Other
+                end, ok, Frames).
+
 tcp_send(Sock, Data) ->
     rabbit_misc:throw_on_error(inet_error,
                                fun () -> rabbit_net:send(Sock, Data) end).
 
 internal_send_command(Sock, Channel, MethodRecord, Protocol) ->
-    ok = tcp_send(Sock, assemble_frames(Channel, MethodRecord, Protocol)).
+    ok = tcp_send(Sock, assemble_frame(Channel, MethodRecord, Protocol)).
 
 internal_send_command(Sock, Channel, MethodRecord, Content, FrameMax,
                       Protocol) ->
-    ok = tcp_send(Sock, assemble_frames(Channel, MethodRecord,
-                                        Content, FrameMax, Protocol)).
+    ok = send_frames(fun tcp_send/2, Sock,
+                     assemble_frames(Channel, MethodRecord,
+                                     Content, FrameMax, Protocol)).
 
 %% gen_tcp:send/2 does a selective receive of {inet_reply, Sock,
 %% Status} to obtain the result. That is bad when it is called from
@@ -219,19 +231,19 @@ internal_send_command_async(MethodRecord,
                             #wstate{sock      = Sock,
                                     channel   = Channel,
                                     protocol  = Protocol}) ->
-    true = port_cmd(Sock, assemble_frames(Channel, MethodRecord, Protocol)),
-    ok.
+    ok = port_cmd(Sock, assemble_frame(Channel, MethodRecord, Protocol)).
 
 internal_send_command_async(MethodRecord, Content,
                             #wstate{sock      = Sock,
                                     channel   = Channel,
                                     frame_max = FrameMax,
                                     protocol  = Protocol}) ->
-    true = port_cmd(Sock, assemble_frames(Channel, MethodRecord,
-                                          Content, FrameMax, Protocol)),
-    ok.
+    ok = send_frames(fun port_cmd/2, Sock,
+                     assemble_frames(Channel, MethodRecord,
+                                     Content, FrameMax, Protocol)).
 
 port_cmd(Sock, Data) ->
-    try rabbit_net:port_command(Sock, Data)
-    catch error:Error -> exit({writer, send_failed, Error})
-    end.
+    true = try rabbit_net:port_command(Sock, Data)
+           catch error:Error -> exit({writer, send_failed, Error})
+           end,
+    ok.
diff --git a/src/supervisor2.erl b/src/supervisor2.erl
index 46bab31d..18e2bdad 100644
--- a/src/supervisor2.erl
+++ b/src/supervisor2.erl
@@ -38,7 +38,7 @@
 %%    child is a supervisor and it exits normally (i.e. with reason of
 %%    'shutdown') then the child's parent also exits normally.
 %%
-%% All modifications are (C) 2010 Rabbit Technologies Ltd.
+%% All modifications are (C) 2010-2011 VMware, Inc.
 %%
 %% %CopyrightBegin%
 %%
diff --git a/src/tcp_acceptor.erl b/src/tcp_acceptor.erl
index c9809ace..194389e3 100644
--- a/src/tcp_acceptor.erl
+++ b/src/tcp_acceptor.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(tcp_acceptor).
diff --git a/src/tcp_acceptor_sup.erl b/src/tcp_acceptor_sup.erl
index 6e3bc4c9..bf0eacd1 100644
--- a/src/tcp_acceptor_sup.erl
+++ b/src/tcp_acceptor_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(tcp_acceptor_sup).
diff --git a/src/tcp_client_sup.erl b/src/tcp_client_sup.erl
index 02d7e0e4..1c2bbb65 100644
--- a/src/tcp_client_sup.erl
+++ b/src/tcp_client_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(tcp_client_sup).
diff --git a/src/tcp_listener.erl b/src/tcp_listener.erl
index 73ef9586..b1bfcafc 100644
--- a/src/tcp_listener.erl
+++ b/src/tcp_listener.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(tcp_listener).
diff --git a/src/tcp_listener_sup.erl b/src/tcp_listener_sup.erl
index 493925ef..58c2f30c 100644
--- a/src/tcp_listener_sup.erl
+++ b/src/tcp_listener_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(tcp_listener_sup).
diff --git a/src/test_sup.erl b/src/test_sup.erl
index f41793bc..76be63d0 100644
--- a/src/test_sup.erl
+++ b/src/test_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(test_sup).
diff --git a/src/vm_memory_monitor.erl b/src/vm_memory_monitor.erl
index 9eb9d0a6..44e1e4b5 100644
--- a/src/vm_memory_monitor.erl
+++ b/src/vm_memory_monitor.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 %% In practice Erlang shouldn't be allowed to grow to more than a half
diff --git a/src/worker_pool.erl b/src/worker_pool.erl
index 595884e0..e4f260cc 100644
--- a/src/worker_pool.erl
+++ b/src/worker_pool.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(worker_pool).
diff --git a/src/worker_pool_sup.erl b/src/worker_pool_sup.erl
index 177a1453..28c1adc6 100644
--- a/src/worker_pool_sup.erl
+++ b/src/worker_pool_sup.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(worker_pool_sup).
diff --git a/src/worker_pool_worker.erl b/src/worker_pool_worker.erl
index f461a539..78ab4df3 100644
--- a/src/worker_pool_worker.erl
+++ b/src/worker_pool_worker.erl
@@ -1,32 +1,17 @@
-%%   The contents of this file are subject to the Mozilla Public License
-%%   Version 1.1 (the "License"); you may not use this file except in
-%%   compliance with the License. You may obtain a copy of the License at
-%%   http://www.mozilla.org/MPL/
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
 %%
-%%   Software distributed under the License is distributed on an "AS IS"
-%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
-%%   License for the specific language governing rights and limitations
-%%   under the License.
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
 %%
-%%   The Original Code is RabbitMQ.
+%% The Original Code is RabbitMQ.
 %%
-%%   The Initial Developers of the Original Code are LShift Ltd,
-%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
-%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
-%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
-%%   Technologies LLC, and Rabbit Technologies Ltd.
-%%
-%%   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
-%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
-%%   Copyright (C) 2007-2010 Cohesive Financial Technologies
-%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
-%%   (C) 2007-2010 Rabbit Technologies Ltd.
-%%
-%%   All Rights Reserved.
-%%
-%%   Contributor(s): ______________________________________.
+%% The Initial Developer of the Original Code is VMware, Inc.
+%% Copyright (c) 2007-2011 VMware, Inc.  All rights reserved.
 %%
 
 -module(worker_pool_worker).
author	Simon MacMullen <simon@rabbitmq.com>	2011-01-24 10:36:49 +0000
committer	Simon MacMullen <simon@rabbitmq.com>	2011-01-24 10:36:49 +0000
commit	cd9c9debea1972307c0678f80fa7007ea7551a92 (patch)
tree	494914aa959368578f05bc43b8276e55c044ffa7
parent	5f7240e024f5566f8e62beef4a78f0cdfdc34990 (diff)
parent	9fd4bf7fa666ea4b7763f676bc00663a42667997 (diff)
download	rabbitmq-server-cd9c9debea1972307c0678f80fa7007ea7551a92.tar.gz