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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.
*
*/
package org.apache.qpid.server.queue;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQBody;
import org.apache.qpid.framing.BasicPublishBody;
import org.apache.qpid.framing.ContentBody;
import org.apache.qpid.framing.ContentHeaderBody;
import org.apache.qpid.server.cluster.ClusteredProtocolSession;
import org.apache.qpid.server.cluster.GroupManager;
import org.apache.qpid.server.cluster.util.LogMessage;
import org.apache.qpid.server.cluster.MemberHandle;
import org.apache.qpid.server.cluster.SimpleSendable;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;
/**
* TODO: separate out an abstract base class from AMQQueue from which this inherits. It does
* not require all the functionality currently in AMQQueue.
*
*/
public class RemoteQueueProxy extends AMQQueue
{
private static final Logger _logger = Logger.getLogger(RemoteQueueProxy.class);
private final MemberHandle _target;
private final GroupManager _groupMgr;
public RemoteQueueProxy(MemberHandle target, GroupManager groupMgr, String name, boolean durable, String owner, boolean autoDelete, QueueRegistry queueRegistry)
throws AMQException
{
super(name, durable, owner, autoDelete, queueRegistry);
_target = target;
_groupMgr = groupMgr;
_groupMgr.addMemberhipChangeListener(new ProxiedQueueCleanup(target, this));
}
public RemoteQueueProxy(MemberHandle target, GroupManager groupMgr, String name, boolean durable, String owner, boolean autoDelete, QueueRegistry queueRegistry, Executor asyncDelivery)
throws AMQException
{
super(name, durable, owner, autoDelete, queueRegistry, asyncDelivery);
_target = target;
_groupMgr = groupMgr;
_groupMgr.addMemberhipChangeListener(new ProxiedQueueCleanup(target, this));
}
public void deliver(AMQMessage msg) throws NoConsumersException
{
if (ClusteredProtocolSession.canRelay(msg, _target))
{
try
{
_logger.debug(new LogMessage("Relaying {0} to {1}", msg, _target));
relay(msg);
}
catch (NoConsumersException e)
{
throw e;
}
catch (AMQException e)
{
//TODO: sort out exception handling...
e.printStackTrace();
}
}
else
{
_logger.debug(new LogMessage("Cannot relay {0} to {1}", msg, _target));
}
}
void relay(AMQMessage msg) throws AMQException
{
BasicPublishBody publish = msg.getPublishBody();
ContentHeaderBody header = msg.getContentHeaderBody();
List<ContentBody> bodies = msg.getContentBodies();
//(i) construct a new publishing block:
publish.immediate = false;//can't as yet handle the immediate flag in a cluster
List<AMQBody> parts = new ArrayList<AMQBody>(2 + bodies.size());
parts.add(publish);
parts.add(header);
parts.addAll(bodies);
//(ii) send this on to the broker for which it is acting as proxy:
_groupMgr.send(_target, new SimpleSendable(parts));
}
}
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