Example 1 with Channel
use of com.rabbitmq.client.impl.AMQImpl.Channel in project rabbitmq-java-client by rabbitmq.
the class ChannelN method processAsync.
/**
* Protected API - Filters the inbound command stream, processing
* Basic.Deliver, Basic.Return and Channel.Close specially. If
* we're in quiescing mode, all inbound commands are ignored,
* except for Channel.Close and Channel.CloseOk.
*/
@Override
public boolean processAsync(Command command) throws IOException {
// If we are isOpen(), then we process commands normally.
//
// If we are not, however, then we are in a quiescing, or
// shutting-down state as the result of an application
// decision to close this channel, and we are to discard all
// incoming commands except for a close and close-ok.
Method method = command.getMethod();
// we deal with channel.close in the same way, regardless
if (method instanceof Channel.Close) {
asyncShutdown(command);
return true;
}
if (isOpen()) {
if (method instanceof Basic.Deliver) {
processDelivery(command, (Basic.Deliver) method);
return true;
} else if (method instanceof Basic.Return) {
callReturnListeners(command, (Basic.Return) method);
return true;
} else if (method instanceof Channel.Flow) {
Channel.Flow channelFlow = (Channel.Flow) method;
synchronized (_channelMutex) {
_blockContent = !channelFlow.getActive();
transmit(new Channel.FlowOk(!_blockContent));
_channelMutex.notifyAll();
}
return true;
} else if (method instanceof Basic.Ack) {
Basic.Ack ack = (Basic.Ack) method;
callConfirmListeners(command, ack);
handleAckNack(ack.getDeliveryTag(), ack.getMultiple(), false);
return true;
} else if (method instanceof Basic.Nack) {
Basic.Nack nack = (Basic.Nack) method;
callConfirmListeners(command, nack);
handleAckNack(nack.getDeliveryTag(), nack.getMultiple(), true);
return true;
} else if (method instanceof Basic.RecoverOk) {
for (Map.Entry<String, Consumer> entry : Utility.copy(_consumers).entrySet()) {
this.dispatcher.handleRecoverOk(entry.getValue(), entry.getKey());
}
// so return false
return false;
} else if (method instanceof Basic.Cancel) {
Basic.Cancel m = (Basic.Cancel) method;
String consumerTag = m.getConsumerTag();
Consumer callback = _consumers.remove(consumerTag);
if (callback == null) {
callback = defaultConsumer;
}
if (callback != null) {
try {
this.dispatcher.handleCancel(callback, consumerTag);
} catch (WorkPoolFullException e) {
// couldn't enqueue in work pool, propagating
throw e;
} catch (Throwable ex) {
getConnection().getExceptionHandler().handleConsumerException(this, ex, callback, consumerTag, "handleCancel");
}
}
return true;
} else {
return false;
}
} else {
if (method instanceof Channel.CloseOk) {
// RPC reply one final time by returning false.
return false;
} else {
// true.
return true;
}
}
}