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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.handler;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.BasicCancelBody;
import org.apache.qpid.framing.BasicCancelOkBody;
import org.apache.qpid.framing.MethodRegistry;
import org.apache.qpid.server.AMQChannel;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.state.StateAwareMethodListener;
import org.apache.log4j.Logger;
public class BasicCancelMethodHandler implements StateAwareMethodListener<BasicCancelBody>
{
private static final Logger _log = Logger.getLogger(BasicCancelMethodHandler.class);
private static final BasicCancelMethodHandler _instance = new BasicCancelMethodHandler();
public static BasicCancelMethodHandler getInstance()
{
return _instance;
}
private BasicCancelMethodHandler()
{
}
public void methodReceived(AMQStateManager stateManager, BasicCancelBody body, int channelId) throws AMQException
{
AMQProtocolSession session = stateManager.getProtocolSession();
final AMQChannel channel = session.getChannel(channelId);
if (channel == null)
{
throw body.getChannelNotFoundException(channelId);
}
if (_log.isDebugEnabled())
{
_log.debug("BasicCancel: for:" + body.getConsumerTag() +
" nowait:" + body.getNowait());
}
channel.unsubscribeConsumer(body.getConsumerTag());
if (!body.getNowait())
{
MethodRegistry methodRegistry = session.getMethodRegistry();
BasicCancelOkBody cancelOkBody = methodRegistry.createBasicCancelOkBody(body.getConsumerTag());
session.writeFrame(cancelOkBody.generateFrame(channelId));
}
}
}
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