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%% 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).
-behaviour(application).
-export([prepare/0, start/0, stop/0, stop_and_halt/0, status/0,
rotate_logs/1]).
-export([start/2, stop/1]).
-export([log_location/1]).
%%---------------------------------------------------------------------------
%% Boot steps.
-export([maybe_insert_default_data/0]).
-rabbit_boot_step({codec_correctness_check,
[{description, "codec correctness check"},
{mfa, {rabbit_binary_generator,
check_empty_content_body_frame_size,
[]}},
{enables, external_infrastructure}]}).
-rabbit_boot_step({database,
[{mfa, {rabbit_mnesia, init, []}},
{enables, external_infrastructure}]}).
-rabbit_boot_step({file_handle_cache,
[{description, "file handle cache server"},
{mfa, {rabbit_sup, start_restartable_child,
[file_handle_cache]}},
{enables, worker_pool}]}).
-rabbit_boot_step({worker_pool,
[{description, "worker pool"},
{mfa, {rabbit_sup, start_child, [worker_pool_sup]}},
{enables, external_infrastructure}]}).
-rabbit_boot_step({external_infrastructure,
[{description, "external infrastructure ready"}]}).
-rabbit_boot_step({rabbit_exchange_type_registry,
[{description, "exchange type registry"},
{mfa, {rabbit_sup, start_child,
[rabbit_exchange_type_registry]}},
{requires, external_infrastructure},
{enables, kernel_ready}]}).
-rabbit_boot_step({rabbit_log,
[{description, "logging server"},
{mfa, {rabbit_sup, start_restartable_child,
[rabbit_log]}},
{requires, external_infrastructure},
{enables, kernel_ready}]}).
-rabbit_boot_step({rabbit_hooks,
[{description, "internal event notification system"},
{mfa, {rabbit_hooks, start, []}},
{requires, external_infrastructure},
{enables, kernel_ready}]}).
-rabbit_boot_step({rabbit_event,
[{description, "statistics event handler"},
{mfa, {rabbit_sup, start_restartable_child,
[gen_event, [{local, rabbit_event}]]}},
{requires, external_infrastructure},
{enables, kernel_ready}]}).
-rabbit_boot_step({kernel_ready,
[{description, "kernel ready"},
{requires, external_infrastructure}]}).
-rabbit_boot_step({rabbit_alarm,
[{description, "alarm handler"},
{mfa, {rabbit_alarm, start, []}},
{requires, kernel_ready},
{enables, core_initialized}]}).
-rabbit_boot_step({rabbit_memory_monitor,
[{description, "memory monitor"},
{mfa, {rabbit_sup, start_restartable_child,
[rabbit_memory_monitor]}},
{requires, rabbit_alarm},
{enables, core_initialized}]}).
-rabbit_boot_step({guid_generator,
[{description, "guid generator"},
{mfa, {rabbit_sup, start_restartable_child,
[rabbit_guid]}},
{requires, kernel_ready},
{enables, core_initialized}]}).
-rabbit_boot_step({delegate_sup,
[{description, "cluster delegate"},
{mfa, {rabbit_sup, start_child,
[delegate_sup]}},
{requires, kernel_ready},
{enables, core_initialized}]}).
-rabbit_boot_step({rabbit_node_monitor,
[{description, "node monitor"},
{mfa, {rabbit_sup, start_restartable_child,
[rabbit_node_monitor]}},
{requires, kernel_ready},
{enables, core_initialized}]}).
-rabbit_boot_step({core_initialized,
[{description, "core initialized"},
{requires, kernel_ready}]}).
-rabbit_boot_step({empty_db_check,
[{description, "empty DB check"},
{mfa, {?MODULE, maybe_insert_default_data, []}},
{requires, core_initialized},
{enables, routing_ready}]}).
-rabbit_boot_step({exchange_recovery,
[{description, "exchange recovery"},
{mfa, {rabbit_exchange, recover, []}},
{requires, empty_db_check},
{enables, routing_ready}]}).
-rabbit_boot_step({queue_sup_queue_recovery,
[{description, "queue supervisor and queue recovery"},
{mfa, {rabbit_amqqueue, start, []}},
{requires, empty_db_check},
{enables, routing_ready}]}).
-rabbit_boot_step({routing_ready,
[{description, "message delivery logic ready"},
{requires, core_initialized}]}).
-rabbit_boot_step({log_relay,
[{description, "error log relay"},
{mfa, {rabbit_error_logger, boot, []}},
{requires, routing_ready},
{enables, networking}]}).
-rabbit_boot_step({networking,
[{mfa, {rabbit_networking, boot, []}},
{requires, log_relay},
{enables, networking_listening}]}).
-rabbit_boot_step({networking_listening,
[{description, "network listeners available"}]}).
%%---------------------------------------------------------------------------
-import(application).
-import(mnesia).
-import(lists).
-import(inet).
-import(gen_tcp).
-include("rabbit_framing.hrl").
-include("rabbit.hrl").
-define(APPS, [os_mon, mnesia, rabbit]).
%%----------------------------------------------------------------------------
-ifdef(use_specs).
-type(file_suffix() :: binary()).
%% this really should be an abstract type
-type(log_location() :: 'tty' | 'undefined' | file:filename()).
-spec(prepare/0 :: () -> 'ok').
-spec(start/0 :: () -> 'ok').
-spec(stop/0 :: () -> 'ok').
-spec(stop_and_halt/0 :: () -> 'ok').
-spec(rotate_logs/1 :: (file_suffix()) -> rabbit_types:ok_or_error(any())).
-spec(status/0 ::
() -> [{running_applications, [{atom(), string(), string()}]} |
{nodes, [{rabbit_mnesia:node_type(), [node()]}]} |
{running_nodes, [node()]}]).
-spec(log_location/1 :: ('sasl' | 'kernel') -> log_location()).
-endif.
%%----------------------------------------------------------------------------
prepare() ->
ok = ensure_working_log_handlers(),
ok = rabbit_mnesia:ensure_mnesia_dir().
start() ->
try
ok = prepare(),
ok = rabbit_misc:start_applications(?APPS)
after
%%give the error loggers some time to catch up
timer:sleep(100)
end.
stop() ->
ok = rabbit_misc:stop_applications(?APPS).
stop_and_halt() ->
try
stop()
after
init:stop()
end,
ok.
status() ->
[{running_applications, application:which_applications()}] ++
rabbit_mnesia:status().
rotate_logs(BinarySuffix) ->
Suffix = binary_to_list(BinarySuffix),
log_rotation_result(rotate_logs(log_location(kernel),
Suffix,
rabbit_error_logger_file_h),
rotate_logs(log_location(sasl),
Suffix,
rabbit_sasl_report_file_h)).
%%--------------------------------------------------------------------
start(normal, []) ->
case erts_version_check() of
ok ->
{ok, SupPid} = rabbit_sup:start_link(),
print_banner(),
[ok = run_boot_step(Step) || Step <- boot_steps()],
io:format("~nbroker running~n"),
{ok, SupPid};
Error ->
Error
end.
stop(_State) ->
terminated_ok = error_logger:delete_report_handler(rabbit_error_logger),
ok = rabbit_alarm:stop(),
ok = case rabbit_mnesia:is_clustered() of
true -> rabbit_amqqueue:on_node_down(node());
false -> rabbit_mnesia:empty_ram_only_tables()
end,
ok.
%%---------------------------------------------------------------------------
erts_version_check() ->
FoundVer = erlang:system_info(version),
case rabbit_misc:version_compare(?ERTS_MINIMUM, FoundVer, lte) of
true -> ok;
false -> {error, {erlang_version_too_old,
{found, FoundVer}, {required, ?ERTS_MINIMUM}}}
end.
boot_error(Format, Args) ->
io:format("BOOT ERROR: " ++ Format, Args),
error_logger:error_msg(Format, Args),
timer:sleep(1000),
exit({?MODULE, failure_during_boot}).
run_boot_step({StepName, Attributes}) ->
Description = case lists:keysearch(description, 1, Attributes) of
{value, {_, D}} -> D;
false -> StepName
end,
case [MFA || {mfa, MFA} <- Attributes] of
[] ->
io:format("-- ~s~n", [Description]);
MFAs ->
io:format("starting ~-60s ...", [Description]),
[case catch apply(M,F,A) of
{'EXIT', Reason} ->
boot_error("FAILED~nReason: ~p~n", [Reason]);
ok ->
ok
end || {M,F,A} <- MFAs],
io:format("done~n"),
ok
end.
module_attributes(Module) ->
case catch Module:module_info(attributes) of
{'EXIT', {undef, [{Module, module_info, _} | _]}} ->
io:format("WARNING: module ~p not found, so not scanned for boot steps.~n",
[Module]),
[];
{'EXIT', Reason} ->
exit(Reason);
V ->
V
end.
boot_steps() ->
AllApps = [App || {App, _, _} <- application:loaded_applications()],
Modules = lists:usort(
lists:append([Modules
|| {ok, Modules} <-
[application:get_key(App, modules)
|| App <- AllApps]])),
UnsortedSteps =
lists:flatmap(fun (Module) ->
[{StepName, Attributes}
|| {rabbit_boot_step, [{StepName, Attributes}]}
<- module_attributes(Module)]
end, Modules),
sort_boot_steps(UnsortedSteps).
sort_boot_steps(UnsortedSteps) ->
G = digraph:new([acyclic]),
%% Add vertices, with duplicate checking.
[case digraph:vertex(G, StepName) of
false -> digraph:add_vertex(G, StepName, Step);
_ -> boot_error("Duplicate boot step name: ~w~n", [StepName])
end || Step = {StepName, _Attrs} <- UnsortedSteps],
%% Add edges, detecting cycles and missing vertices.
lists:foreach(fun ({StepName, Attributes}) ->
[add_boot_step_dep(G, StepName, PrecedingStepName)
|| {requires, PrecedingStepName} <- Attributes],
[add_boot_step_dep(G, SucceedingStepName, StepName)
|| {enables, SucceedingStepName} <- Attributes]
end, UnsortedSteps),
%% Use topological sort to find a consistent ordering (if there is
%% one, otherwise fail).
SortedStepsRev = [begin
{StepName, Step} = digraph:vertex(G, StepName),
Step
end || StepName <- digraph_utils:topsort(G)],
SortedSteps = lists:reverse(SortedStepsRev),
digraph:delete(G),
%% Check that all mentioned {M,F,A} triples are exported.
case [{StepName, {M,F,A}}
|| {StepName, Attributes} <- SortedSteps,
{mfa, {M,F,A}} <- Attributes,
not erlang:function_exported(M, F, length(A))] of
[] -> SortedSteps;
MissingFunctions -> boot_error("Boot step functions not exported: ~p~n",
[MissingFunctions])
end.
add_boot_step_dep(G, RunsSecond, RunsFirst) ->
case digraph:add_edge(G, RunsSecond, RunsFirst) of
{error, Reason} ->
boot_error("Could not add boot step dependency of ~w on ~w:~n~s",
[RunsSecond, RunsFirst,
case Reason of
{bad_vertex, V} ->
io_lib:format("Boot step not registered: ~w~n", [V]);
{bad_edge, [First | Rest]} ->
[io_lib:format("Cyclic dependency: ~w", [First]),
[io_lib:format(" depends on ~w", [Next])
|| Next <- Rest],
io_lib:format(" depends on ~w~n", [First])]
end]);
_ ->
ok
end.
%%---------------------------------------------------------------------------
log_location(Type) ->
case application:get_env(Type, case Type of
kernel -> error_logger;
sasl -> sasl_error_logger
end) of
{ok, {file, File}} -> File;
{ok, false} -> undefined;
{ok, tty} -> tty;
{ok, silent} -> undefined;
{ok, Bad} -> throw({error, {cannot_log_to_file, Bad}});
_ -> undefined
end.
app_location() ->
{ok, Application} = application:get_application(),
filename:absname(code:where_is_file(atom_to_list(Application) ++ ".app")).
home_dir() ->
case init:get_argument(home) of
{ok, [[Home]]} -> Home;
Other -> Other
end.
%---------------------------------------------------------------------------
print_banner() ->
{ok, Product} = application:get_key(id),
{ok, Version} = application:get_key(vsn),
ProductLen = string:len(Product),
io:format("~n"
"+---+ +---+~n"
"| | | |~n"
"| | | |~n"
"| | | |~n"
"| +---+ +-------+~n"
"| |~n"
"| ~s +---+ |~n"
"| | | |~n"
"| ~s +---+ |~n"
"| |~n"
"+-------------------+~n"
"~s~n~s~n~s~n~n",
[Product, string:right([$v|Version], ProductLen),
?PROTOCOL_VERSION,
?COPYRIGHT_MESSAGE, ?INFORMATION_MESSAGE]),
Settings = [{"node", node()},
{"app descriptor", app_location()},
{"home dir", home_dir()},
{"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),
io:nl().
ensure_working_log_handlers() ->
Handlers = gen_event:which_handlers(error_logger),
ok = ensure_working_log_handler(error_logger_file_h,
rabbit_error_logger_file_h,
error_logger_tty_h,
log_location(kernel),
Handlers),
ok = ensure_working_log_handler(sasl_report_file_h,
rabbit_sasl_report_file_h,
sasl_report_tty_h,
log_location(sasl),
Handlers),
ok.
ensure_working_log_handler(OldFHandler, NewFHandler, TTYHandler,
LogLocation, Handlers) ->
case LogLocation of
undefined -> ok;
tty -> case lists:member(TTYHandler, Handlers) of
true -> ok;
false ->
throw({error, {cannot_log_to_tty,
TTYHandler, not_installed}})
end;
_ -> case lists:member(NewFHandler, Handlers) of
true -> ok;
false -> case rotate_logs(LogLocation, "",
OldFHandler, NewFHandler) of
ok -> ok;
{error, Reason} ->
throw({error, {cannot_log_to_file,
LogLocation, Reason}})
end
end
end.
maybe_insert_default_data() ->
case rabbit_mnesia:is_db_empty() of
true -> insert_default_data();
false -> ok
end.
insert_default_data() ->
{ok, DefaultUser} = application:get_env(default_user),
{ok, DefaultPass} = application:get_env(default_pass),
{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_access_control:set_permissions(DefaultUser, DefaultVHost,
DefaultConfigurePerm,
DefaultWritePerm,
DefaultReadPerm),
ok.
rotate_logs(File, Suffix, Handler) ->
rotate_logs(File, Suffix, Handler, Handler).
rotate_logs(File, Suffix, OldHandler, NewHandler) ->
case File of
undefined -> ok;
tty -> ok;
_ -> gen_event:swap_handler(
error_logger,
{OldHandler, swap},
{NewHandler, {File, Suffix}})
end.
log_rotation_result({error, MainLogError}, {error, SaslLogError}) ->
{error, {{cannot_rotate_main_logs, MainLogError},
{cannot_rotate_sasl_logs, SaslLogError}}};
log_rotation_result({error, MainLogError}, ok) ->
{error, {cannot_rotate_main_logs, MainLogError}};
log_rotation_result(ok, {error, SaslLogError}) ->
{error, {cannot_rotate_sasl_logs, SaslLogError}};
log_rotation_result(ok, ok) ->
ok.
|