/**
* $Revision: $
* $Date: $
*
* Copyright (C) 2007-2009 Jive Software. All rights reserved.
*
* Licensed 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 com.jivesoftware.util.cache;
import com.tangosol.util.MapEvent;
import com.tangosol.util.MapListener;
import org.jivesoftware.openfire.XMPPServer;
import org.jivesoftware.openfire.cluster.NodeID;
import java.util.Set;
/**
* Base listener for cache events in the cluster. This class helps keep track
* of nodes and their elements. The actual tracking information is kept in
* {@link ClusterListener}. This information is then used when a node goes
* down to proper clean up can be done
*
* @author Pete Matern
* @author Gaston Dombiak
*/
abstract class CacheListener implements MapListener {
protected final String cacheName;
private ClusterListener clusterListener;
public CacheListener(ClusterListener clusterListener, String cacheName) {
this.clusterListener = clusterListener;
this.cacheName = cacheName;
}
public void entryInserted(MapEvent mapEvent) {
handleMapEvent(mapEvent, false);
}
public void entryUpdated(MapEvent mapEvent) {
handleMapEvent(mapEvent, false);
}
public void entryDeleted(MapEvent mapEvent) {
handleMapEvent(mapEvent, true);
}
void handleMapEvent(MapEvent mapEvent, boolean removal) {
NodeID nodeID = getNodeID(mapEvent, removal);
//ignore items which this node has added
if (!XMPPServer.getInstance().getNodeID().equals(nodeID)) {
Set<String> sessionJIDS = clusterListener.lookupJIDList(nodeID, cacheName);
if (removal) {
sessionJIDS.remove(mapEvent.getKey().toString());
}
else {
sessionJIDS.add(mapEvent.getKey().toString());
}
}
}
abstract NodeID getNodeID(MapEvent mapEvent, boolean removal);
}