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*
* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.qpid.server.protocol.v0_8.handler;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQMethodBody;
import org.apache.qpid.framing.MethodRegistry;
import org.apache.qpid.framing.TxRollbackBody;
import org.apache.qpid.server.protocol.v0_8.AMQChannel;
import org.apache.qpid.server.protocol.v0_8.AMQProtocolSession;
import org.apache.qpid.server.protocol.v0_8.state.AMQStateManager;
import org.apache.qpid.server.protocol.v0_8.state.StateAwareMethodListener;
public class TxRollbackHandler implements StateAwareMethodListener<TxRollbackBody>
{
private static TxRollbackHandler _instance = new TxRollbackHandler();
public static TxRollbackHandler getInstance()
{
return _instance;
}
private TxRollbackHandler()
{
}
public void methodReceived(AMQStateManager stateManager, TxRollbackBody body, final int channelId) throws AMQException
{
final AMQProtocolSession session = stateManager.getProtocolSession();
try
{
AMQChannel channel = session.getChannel(channelId);
if (channel == null)
{
throw body.getChannelNotFoundException(channelId);
}
final MethodRegistry methodRegistry = session.getMethodRegistry();
final AMQMethodBody responseBody = methodRegistry.createTxRollbackOkBody();
Runnable task = new Runnable()
{
public void run()
{
session.writeFrame(responseBody.generateFrame(channelId));
}
};
channel.rollback(task);
//Now resend all the unacknowledged messages back to the original subscribers.
//(Must be done after the TxnRollback-ok response).
// Why, are we not allowed to send messages back to client before the ok method?
channel.resend(false);
}
catch (AMQException e)
{
throw body.getChannelException(e.getErrorCode(), "Failed to rollback: " + e.getMessage());
}
}
}