Send heartbeat from broker to client

- Server sends possible heartbeat range and client replies with desired
  heartbeat as part of the tune-tuneOk exchange


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@734220 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 44 insertions, 2 deletions

diff --git a/cpp/src/qpid/broker/Connection.cpp b/cpp/src/qpid/broker/Connection.cpp
index eb54ddfd56..66ee6281c6 100644
--- a/cpp/src/qpid/broker/Connection.cpp
+++ b/cpp/src/qpid/broker/Connection.cpp
@@ -38,7 +38,6 @@
 
 using namespace qpid::sys;
 using namespace qpid::framing;
-using namespace qpid::sys;
 using qpid::ptr_map_ptr;
 using qpid::management::ManagementAgent;
 using qpid::management::ManagementObject;
@@ -57,7 +56,8 @@ Connection::Connection(ConnectionOutputHandler* out_, Broker& broker_, const std
     mgmtId(mgmtId_),
     mgmtObject(0),
     links(broker_.getLinks()),
-    agent(0)
+    agent(0),
+    timer(broker_.getTimer())
 {
     Manageable* parent = broker.GetVhostObject();
 
@@ -92,6 +92,9 @@ Connection::~Connection()
     }
     if (isLink)
         links.notifyClosed(mgmtId);
+        
+    if (heartbeatTimer)
+        heartbeatTimer->cancel();
 }
 
 void Connection::received(framing::AMQFrame& frame) {
@@ -174,6 +177,8 @@ void Connection::setFederationLink(bool b)
 void Connection::close(connection::CloseCode code, const string& text)
 {
     QPID_LOG_IF(error, code != connection::CLOSE_CODE_NORMAL, "Connection " << mgmtId << " closed by error: " << text << "(" << code << ")");
+    if (heartbeatTimer)
+    	heartbeatTimer->cancel();
     adapter.close(code, text);
     //make sure we delete dangling pointers from outputTasks before deleting sessions
     outputTasks.removeAll();
@@ -183,6 +188,8 @@ void Connection::close(connection::CloseCode code, const string& text)
 
 // Send a close to the client but keep the channels. Used by cluster.
 void Connection::sendClose() {
+    if (heartbeatTimer)
+    	heartbeatTimer->cancel();
     adapter.close(connection::CLOSE_CODE_NORMAL, "OK");
     getOutput().close();
 }
@@ -230,6 +237,10 @@ bool Connection::doOutput() {
     return false;
 }
 
+void Connection::sendHeartbeat() {
+	adapter.heartbeat();
+}
+
 void Connection::closeChannel(uint16_t id) {
     ChannelMap::iterator i = channels.find(id);
     if (i != channels.end()) channels.erase(i);
@@ -272,5 +283,36 @@ void Connection::setSecureConnection(SecureConnection* s)
     adapter.setSecureConnection(s);
 }
 
+struct ConnectionHeartbeatTask : public TimerTask {
+    Timer& timer;
+    Connection& connection;
+    ConnectionHeartbeatTask(uint16_t hb, Timer& t, Connection& c) :  
+        TimerTask(Duration(hb*TIME_SEC)),
+        timer(t),
+        connection(c)
+    {}
+    
+    void fire() {
+        // This is the best we can currently do to avoid a destruction/fire race
+        if (!isCancelled()) {
+            // Setup next firing
+            reset();
+            timer.add(this);
+            
+            // Send Heartbeat
+            connection.sendHeartbeat();
+        }
+    }
+};
+
+void Connection::setHeartbeatInterval(uint16_t heartbeat)
+{
+    setHeartbeat(heartbeat);
+    if (heartbeat > 0) {
+    	heartbeatTimer = new ConnectionHeartbeatTask(heartbeat, timer, *this);
+    	timer.add(heartbeatTimer);
+    }
+}
+
 }}