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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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.txn;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.server.queue.AMQMessage;
import org.apache.qpid.server.queue.NoConsumersException;
import org.apache.qpid.server.RequiredDeliveryException;
import java.util.List;
/**
* @author Apache Software Foundation
*/
public class CleanupMessageOperation implements TxnOp
{
private static final Logger _log = Logger.getLogger(CleanupMessageOperation.class);
private final AMQMessage _msg;
private final List<RequiredDeliveryException> _returns;
public CleanupMessageOperation(AMQMessage msg, List<RequiredDeliveryException> returns)
{
_msg = msg;
_returns = returns;
}
public void prepare() throws AMQException
{
}
public void undoPrepare()
{
//don't need to do anything here, if the store's txn failed
//when processing prepare then the message was not stored
//or enqueued on any queues and can be discarded
}
public void commit()
{
//The routers reference can now be released. This is done
//here to ensure that it happens after the queues that
//enqueue it have incremented their counts (which as a
//memory only operation is done in the commit phase).
try
{
_msg.decrementReference();
}
catch (AMQException e)
{
_log.error("On commiting transaction, failed to cleanup unused message: " + e, e);
}
try
{
_msg.checkDeliveredToConsumer();
}
catch (NoConsumersException e)
{
//TODO: store this for delivery after the commit-ok
_returns.add(e);
}
catch (AMQException e)
{
_log.error("On commiting transaction, unable to determine whether delivered to a consumer immediately: " +
e, e);
}
}
public void rollback()
{
}
}
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