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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.nclient.amqp;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.log4j.Logger;
import org.apache.qpid.framing.AMQMethodBody;
import org.apache.qpid.nclient.core.AMQPException;
import org.apache.qpid.nclient.model.AMQPMethodEvent;
import org.apache.qpid.nclient.model.AMQPMethodListener;
/**
* This class registeres with the ModelPhase as a AMQMethodListener,
* to receive method events and then it distributes methods to other listerners
* using a filtering criteria. The criteria is channel id and method body class.
* The method listeners are added and removed dynamically
*
* <p/>
*/
public class EventManager implements AMQPMethodListener
{
private static final Logger _logger = Logger.getLogger(EventManager.class);
private Map <Integer,Map> _channelMap = new ConcurrentHashMap<Integer,Map>();
/**
* ------------------------------------------------
* methods introduced by AMQPMethodEventManager
* ------------------------------------------------
*/
public void addMethodEventListener(int channelId,Class clazz,AMQPMethodListener l)
{
Map<Class,List> _methodListenerMap;
if (_channelMap.containsKey(channelId))
{
_methodListenerMap = _channelMap.get(channelId);
}
else
{
_methodListenerMap = new ConcurrentHashMap<Class,List>();
_channelMap.put(channelId, _methodListenerMap);
}
List<AMQPMethodListener> _listeners;
if (_methodListenerMap.containsKey(clazz))
{
_listeners = _methodListenerMap.get(clazz);
}
else
{
_listeners = new ArrayList<AMQPMethodListener>();
_methodListenerMap.put(clazz, _listeners);
}
_listeners.add(l);
}
public void removeMethodEventListener(int channelId,Class clazz,AMQPMethodListener l)
{
if (_channelMap.containsKey(channelId))
{
Map<Class,List> _methodListenerMap = _channelMap.get(channelId);
if (_methodListenerMap.containsKey(clazz))
{
List<AMQPMethodListener> _listeners = _methodListenerMap.get(clazz);
_listeners.remove(l);
}
}
}
/**
* ------------------------------------------------
* methods introduced by AMQMethodListener
* ------------------------------------------------
*/
/* (non-Javadoc)
* @see org.apache.qpid.nclient.model.AMQStateManager#methodReceived(org.apache.qpid.protocol.AMQMethodEvent)
*/
public <B extends AMQMethodBody> boolean methodReceived(AMQPMethodEvent<B> evt) throws AMQPException
{
if (_channelMap.containsKey(evt.getChannelId()))
{
Map<Class,List> _methodListenerMap = _channelMap.get(evt.getChannelId());
if (_methodListenerMap.containsKey(evt.getMethod().getClass()))
{
List<AMQPMethodListener> _listeners = _methodListenerMap.get(evt.getMethod().getClass());
for (AMQPMethodListener l:_listeners)
{
l.methodReceived(evt);
}
return (_listeners.size()>0);
}
}
return false;
}
}
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