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/*
* Copyright (c) 2011 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.network.base;
import com.jme3.network.Message;
import com.jme3.network.MessageListener;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Keeps track of message listeners registered to specific
* types or to any type.
*
* @version $Revision: 8843 $
* @author Paul Speed
*/
public class MessageListenerRegistry<S> implements MessageListener<S>
{
static Logger log = Logger.getLogger(MessageListenerRegistry.class.getName());
private List<MessageListener<? super S>> listeners = new CopyOnWriteArrayList<MessageListener<? super S>>();
private Map<Class,List<MessageListener<? super S>>> typeListeners
= new ConcurrentHashMap<Class,List<MessageListener<? super S>>>();
public MessageListenerRegistry()
{
}
public void messageReceived( S source, Message m )
{
boolean delivered = false;
for( MessageListener<? super S> l : listeners ) {
l.messageReceived( source, m );
delivered = true;
}
for( MessageListener<? super S> l : getListeners(m.getClass(),false) ) {
l.messageReceived( source, m );
delivered = true;
}
if( !delivered ) {
log.log( Level.INFO, "Received message had no registered listeners: {0}", m );
}
}
protected List<MessageListener<? super S>> getListeners( Class c, boolean create )
{
List<MessageListener<? super S>> result = typeListeners.get(c);
if( result == null && create ) {
result = new CopyOnWriteArrayList<MessageListener<? super S>>();
typeListeners.put( c, result );
}
if( result == null ) {
result = Collections.emptyList();
}
return result;
}
public void addMessageListener( MessageListener<? super S> listener )
{
listeners.add(listener);
}
public void removeMessageListener( MessageListener<? super S> listener )
{
listeners.remove(listener);
}
public void addMessageListener( MessageListener<? super S> listener, Class... classes )
{
for( Class c : classes ) {
getListeners(c, true).add(listener);
}
}
public void removeMessageListener( MessageListener<? super S> listener, Class... classes )
{
for( Class c : classes ) {
getListeners(c, false).remove(listener);
}
}
}
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