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*
* 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.
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*/
package org.apache.qpid.server.protocol.v0_8.handler;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.BasicRejectBody;
import org.apache.qpid.server.message.MessageInstance;
import org.apache.qpid.server.protocol.v0_8.AMQChannel;
import org.apache.qpid.server.protocol.v0_8.AMQProtocolSession;
import org.apache.qpid.server.queue.QueueEntry;
import org.apache.qpid.server.protocol.v0_8.state.AMQStateManager;
import org.apache.qpid.server.protocol.v0_8.state.StateAwareMethodListener;
public class BasicRejectMethodHandler implements StateAwareMethodListener<BasicRejectBody>
{
private static final Logger _logger = Logger.getLogger(BasicRejectMethodHandler.class);
private static BasicRejectMethodHandler _instance = new BasicRejectMethodHandler();
public static BasicRejectMethodHandler getInstance()
{
return _instance;
}
private BasicRejectMethodHandler()
{
}
public void methodReceived(AMQStateManager stateManager, BasicRejectBody body, int channelId) throws AMQException
{
AMQProtocolSession session = stateManager.getProtocolSession();
AMQChannel channel = session.getChannel(channelId);
if (channel == null)
{
throw body.getChannelNotFoundException(channelId);
}
if (_logger.isDebugEnabled())
{
_logger.debug("Rejecting:" + body.getDeliveryTag() +
": Requeue:" + body.getRequeue() +
" on channel:" + channel.debugIdentity());
}
long deliveryTag = body.getDeliveryTag();
MessageInstance message = channel.getUnacknowledgedMessageMap().get(deliveryTag);
if (message == null)
{
_logger.warn("Dropping reject request as message is null for tag:" + deliveryTag);
}
else
{
if (message.getMessage() == null)
{
_logger.warn("Message has already been purged, unable to Reject.");
return;
}
if (_logger.isDebugEnabled())
{
_logger.debug("Rejecting: DT:" + deliveryTag + "-" + message.getMessage() +
": Requeue:" + body.getRequeue() +
" on channel:" + channel.debugIdentity());
}
if (body.getRequeue())
{
//this requeue represents a message rejected from the pre-dispatch queue
//therefore we need to amend the delivery counter.
message.decrementDeliveryCount();
channel.requeue(deliveryTag);
}
else
{
// Since the Java client abuses the reject flag for requeing after rollback, we won't set reject here
// as it would prevent redelivery
// message.reject();
final boolean maxDeliveryCountEnabled = channel.isMaxDeliveryCountEnabled(deliveryTag);
_logger.debug("maxDeliveryCountEnabled: " + maxDeliveryCountEnabled + " deliveryTag " + deliveryTag);
if (maxDeliveryCountEnabled)
{
final boolean deliveredTooManyTimes = channel.isDeliveredTooManyTimes(deliveryTag);
_logger.debug("deliveredTooManyTimes: " + deliveredTooManyTimes + " deliveryTag " + deliveryTag);
if (deliveredTooManyTimes)
{
channel.deadLetter(body.getDeliveryTag());
}
else
{
//this requeue represents a message rejected because of a recover/rollback that we
//are not ready to DLQ. We rely on the reject command to resend from the unacked map
//and therefore need to increment the delivery counter so we cancel out the effect
//of the AMQChannel#resend() decrement.
message.incrementDeliveryCount();
}
}
else
{
channel.requeue(deliveryTag);
}
}
}
}
}