1 files changed, 130 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/broker/amqp/Relay.h b/qpid/cpp/src/qpid/broker/amqp/Relay.h
new file mode 100644
index 0000000000..32f317bfe1
--- /dev/null
+++ b/qpid/cpp/src/qpid/broker/amqp/Relay.h
@@ -0,0 +1,130 @@
+#ifndef QPID_BROKER_AMQP_RELAY_H
+#define QPID_BROKER_AMQP_RELAY_H
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#include "Incoming.h"
+#include "Outgoing.h"
+#include "qpid/sys/Mutex.h"
+extern "C" {
+#include <proton/engine.h>
+}
+#include <deque>
+
+namespace qpid {
+namespace broker {
+namespace amqp {
+
+struct Delivery
+{
+    bool settled;
+    pn_delivery_t* handle;
+
+    Delivery();
+    Delivery(pn_delivery_t* d);
+};
+
+class BufferedTransfer
+{
+  public:
+    BufferedTransfer();
+    void initIn(pn_link_t* link, pn_delivery_t* d);
+    bool settle();
+    void initOut(pn_link_t* link);
+    uint64_t updated();
+    bool write(pn_link_t*);
+  private:
+    std::vector<char> data;
+    Delivery in;
+    Delivery out;
+    pn_delivery_tag_t dt;
+    std::vector<char> tag;
+    uint64_t disposition;
+};
+
+/**
+ *
+ */
+class Relay
+{
+  public:
+    Relay(size_t max);
+    void check();
+    size_t size() const;
+    BufferedTransfer& front();
+    void pop();
+    bool send(pn_link_t*);
+    void received(pn_link_t* link, pn_delivery_t* delivery);
+    int getCredit() const;
+    void setCredit(int);
+    void attached(Outgoing*);
+    void attached(Incoming*);
+    void detached(Outgoing*);
+    void detached(Incoming*);
+  private:
+    std::deque<BufferedTransfer> buffer;//TODO: optimise by replacing with simple circular array
+    int credit;//issued by outgoing peer, decremented everytime we send a message on outgoing link
+    size_t max;
+    size_t head;
+    size_t tail;
+    bool isDetached;
+    Outgoing* out;
+    Incoming* in;
+    mutable qpid::sys::Mutex lock;
+
+    BufferedTransfer& push();
+};
+
+class OutgoingFromRelay : public Outgoing
+{
+  public:
+    OutgoingFromRelay(pn_link_t*, Broker&, Session&, const std::string& source,
+                      const std::string& target, const std::string& name, boost::shared_ptr<Relay>);
+    bool doWork();
+    void handle(pn_delivery_t* delivery);
+    void detached(bool closed);
+    void init();
+    void setSubjectFilter(const std::string&);
+    void setSelectorFilter(const std::string&);
+  private:
+    const std::string name;
+    pn_link_t* link;
+    boost::shared_ptr<Relay> relay;
+};
+
+class IncomingToRelay : public Incoming
+{
+  public:
+    IncomingToRelay(pn_link_t*, Broker&, Session&, const std::string& source,
+                    const std::string& target, const std::string& name, boost::shared_ptr<Relay> r);
+    bool settle();
+    bool doWork();
+    bool haveWork();
+    void detached(bool closed);
+    void readable(pn_delivery_t* delivery);
+    uint32_t getCredit();
+  private:
+    boost::shared_ptr<Relay> relay;
+};
+
+}}} // namespace qpid::broker::amqp
+
+#endif  /*!QPID_BROKER_AMQP_RELAY_H*/