package org.apache.jcs.auxiliary.lateral.socket.udp;
/*
* 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.
*/
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import org.apache.jcs.auxiliary.lateral.LateralCacheInfo;
import org.apache.jcs.auxiliary.lateral.behavior.ILateralCacheAttributes;
import org.apache.jcs.auxiliary.lateral.behavior.ILateralCacheListener;
import org.apache.jcs.engine.behavior.ICache;
import org.apache.jcs.engine.behavior.ICacheElement;
import org.apache.jcs.engine.behavior.ICache;
import org.apache.jcs.engine.control.CompositeCacheManager;
import org.apache.jcs.engine.CacheConstants;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Description of the Class
*
*/
public class LateralCacheUDPListener implements ILateralCacheListener, Serializable
{
private final static Log log =
LogFactory.getLog( LateralCacheUDPListener.class );
/** Description of the Field */
protected static transient CompositeCacheManager cacheMgr;
/** Description of the Field */
protected final static HashMap instances = new HashMap();
// instance vars
private LateralUDPReceiver receiver;
private ILateralCacheAttributes ilca;
private boolean inited = false;
/**
* Only need one since it does work for all regions, just reference by
* multiple region names.
*
* @param ilca
*/
protected LateralCacheUDPListener( ILateralCacheAttributes ilca ) { }
/** Description of the Method */
public void init()
{
try
{
// need to connect based on type
receiver = new LateralUDPReceiver( ilca, this );
Thread t = new Thread( receiver );
t.start();
}
catch ( Exception ex )
{
log.error( ex );
throw new IllegalStateException( ex.getMessage() );
}
}
/**
* let the lateral cache set a listener_id. Since there is only one
* listerenr for all the regions and every region gets registered? the id
* shouldn't be set if it isn't zero. If it is we assume that it is a
* reconnect.
*
* @param id The new listenerId value
*/
public void setListenerId( long id )
throws IOException
{
LateralCacheInfo.listenerId = id;
if ( log.isDebugEnabled() )
{
log.debug( "set listenerId = " + id );
}
}
/**
* Gets the listenerId attribute of the LateralCacheUDPListener object
*
* @return The listenerId value
*/
public long getListenerId()
throws IOException
{
// set the manager since we are in use
//getCacheManager();
//p( "get listenerId" );
if ( log.isDebugEnabled() )
{
log.debug( "get listenerId = " + LateralCacheInfo.listenerId );
}
return LateralCacheInfo.listenerId;
}
/**
* Gets the instance attribute of the LateralCacheUDPListener class
*
* @return The instance value
*/
public static ILateralCacheListener getInstance( ILateralCacheAttributes ilca )
{
//throws IOException, NotBoundException
ILateralCacheListener ins = ( ILateralCacheListener ) instances.get( ilca.getUdpMulticastAddr() + ":" + ilca.getUdpMulticastPort() );
if ( ins == null )
{
synchronized ( LateralCacheUDPListener.class )
{
if ( ins == null )
{
ins = new LateralCacheUDPListener( ilca );
ins.init();
}
if ( log.isDebugEnabled() )
{
log.debug( "created new listener " + ilca.getUdpMulticastAddr() + ":" + ilca.getUdpMulticastPort() );
}
instances.put( ilca.getUdpMulticastAddr() + ":" + ilca.getUdpMulticastPort(), ins );
}
}
return ins;
}
//////////////////////////// implements the ILateralCacheListener interface. //////////////
/** */
public void handlePut( ICacheElement cb )
throws IOException
{
if ( log.isDebugEnabled() )
{
log.debug( "PUTTING ELEMENT FROM LATERAL" );
}
getCacheManager();
cacheMgr.getCache( cb.getCacheName() ).localUpdate( cb );
}
/** Description of the Method */
public void handleRemove( String cacheName, Serializable key )
throws IOException
{
if ( log.isDebugEnabled() )
{
log.debug( "handleRemove> cacheName=" + cacheName + ", key=" + key );
}
getCacheManager();
// interface limitation here
cacheMgr.getCache( cacheName ).localRemove( key );
}
/** Description of the Method */
public void handleRemoveAll( String cacheName )
throws IOException
{
if ( log.isDebugEnabled() )
{
log.debug( "handleRemoveAll> cacheName=" + cacheName );
}
getCacheManager();
ICache cache = cacheMgr.getCache( cacheName );
cache.removeAll();
}
/** Description of the Method */
public void handleDispose( String cacheName )
throws IOException
{
if ( log.isDebugEnabled() )
{
log.debug( "handleDispose> cacheName=" + cacheName );
}
CompositeCacheManager cm = ( CompositeCacheManager ) cacheMgr;
cm.freeCache( cacheName, true );
}
// override for new funcitonality
/**
* Gets the cacheManager attribute of the LateralCacheUDPListener object
*/
protected void getCacheManager()
{
if ( cacheMgr == null )
{
cacheMgr = CompositeCacheManager.getInstance();
if ( log.isDebugEnabled() )
{
log.debug( "had to get cacheMgr: " + cacheMgr );
}
}
else
{
if ( log.isDebugEnabled() )
{
log.debug( "already got cacheMgr: " + cacheMgr );
}
}
}
}