/**
* Handles incoming control commands on channel zero.
*
* @see ChannelN#processAsync
*/
@SuppressWarnings("unused")
public boolean processControlCommand(Command c) throws IOException {
// Similar trick to ChannelN.processAsync used here, except
// we're interested in whole-connection quiescing.
// See the detailed comments in ChannelN.processAsync.
Method method = c.getMethod();
if (isOpen()) {
if (method instanceof AMQP.Connection.Close) {
handleConnectionClose(c);
return true;
} else if (method instanceof AMQP.Connection.Blocked) {
AMQP.Connection.Blocked blocked = (AMQP.Connection.Blocked) method;
try {
for (BlockedListener l : this.blockedListeners) {
l.handleBlocked(blocked.getReason());
}
} catch (Throwable ex) {
getExceptionHandler().handleBlockedListenerException(this, ex);
}
return true;
} else if (method instanceof AMQP.Connection.Unblocked) {
try {
for (BlockedListener l : this.blockedListeners) {
l.handleUnblocked();
}
} catch (Throwable ex) {
getExceptionHandler().handleBlockedListenerException(this, ex);
}
return true;
} else {
return false;
}
} else {
if (method instanceof AMQP.Connection.Close) {
// Already shutting down, so just send back a CloseOk.
try {
_channel0.quiescingTransmit(new AMQP.Connection.CloseOk.Builder().build());
} catch (IOException ignored) {
} // ignore
return true;
} else if (method instanceof AMQP.Connection.CloseOk) {
// It's our final "RPC". Time to shut down.
_running = false;
// If Close was sent from within the MainLoop we
// will not have a continuation to return to, so
// we treat this as processed in that case.
return !_channel0.isOutstandingRpc();
} else { // Ignore all others.
return true;
}
}
}
@SuppressWarnings("unused")
public void handleConnectionClose(Command closeCommand) {
ShutdownSignalException sse =
shutdown(closeCommand.getMethod(), false, null, _inConnectionNegotiation);
try {
_channel0.quiescingTransmit(new AMQP.Connection.CloseOk.Builder().build());
} catch (IOException ignored) {
} // ignore
_brokerInitiatedShutdown = true;
SocketCloseWait scw = new SocketCloseWait(sse);
// if shutdown executor is configured, use it. Otherwise
// execut socket close monitor the old fashioned way.
// see rabbitmq/rabbitmq-java-client#91
if (shutdownExecutor != null) {
shutdownExecutor.execute(scw);
} else {
final String name =
"RabbitMQ connection shutdown monitor " + getHostAddress() + ":" + getPort();
Thread waiter = Environment.newThread(threadFactory, scw, name);
waiter.start();
}
}