| package org.apache.commons.jcs3.auxiliary.remote; |
| |
| /* |
| * 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.rmi.RemoteException; |
| import java.rmi.server.UnicastRemoteObject; |
| |
| import org.apache.commons.jcs3.auxiliary.remote.behavior.IRemoteCacheAttributes; |
| import org.apache.commons.jcs3.auxiliary.remote.behavior.IRemoteCacheConstants; |
| import org.apache.commons.jcs3.engine.behavior.ICompositeCacheManager; |
| import org.apache.commons.jcs3.engine.behavior.IElementSerializer; |
| import org.apache.commons.jcs3.log.Log; |
| import org.apache.commons.jcs3.log.LogManager; |
| |
| /** |
| * Registered with RemoteCache server. The server updates the local caches via this listener. Each |
| * server assigns a unique listener id for a listener. |
| * <p> |
| * One listener is used per remote cache server. The same listener is used for all the regions that |
| * talk to a particular server. |
| */ |
| public class RemoteCacheListener<K, V> |
| extends AbstractRemoteCacheListener<K, V> |
| implements IRemoteCacheConstants |
| { |
| /** The logger */ |
| private static final Log log = LogManager.getLog( RemoteCacheListener.class ); |
| |
| /** Has this client been shutdown. */ |
| private boolean disposed; |
| |
| /** |
| * Only need one since it does work for all regions, just reference by multiple region names. |
| * <p> |
| * The constructor exports this object, making it available to receive incoming calls. The |
| * callback port is anonymous unless a local port value was specified in the configuration. |
| * <p> |
| * @param irca cache configuration |
| * @param cacheMgr the cache hub |
| * @param elementSerializer a custom serializer |
| */ |
| public RemoteCacheListener( final IRemoteCacheAttributes irca, final ICompositeCacheManager cacheMgr, final IElementSerializer elementSerializer ) |
| { |
| super( irca, cacheMgr, elementSerializer ); |
| |
| // Export this remote object to make it available to receive incoming |
| // calls. |
| try |
| { |
| UnicastRemoteObject.exportObject( this, irca.getLocalPort() ); |
| } |
| catch ( final RemoteException ex ) |
| { |
| log.error( "Problem exporting object.", ex ); |
| throw new IllegalStateException( ex.getMessage() ); |
| } |
| } |
| |
| /** |
| * Deregister itself. |
| * <p> |
| * @throws IOException |
| */ |
| @Override |
| public synchronized void dispose() |
| throws IOException |
| { |
| if ( !disposed ) |
| { |
| log.info( "Unexporting listener." ); |
| try |
| { |
| UnicastRemoteObject.unexportObject( this, true ); |
| } |
| catch ( final RemoteException ex ) |
| { |
| log.error( "Problem unexporting the listener.", ex ); |
| throw new IllegalStateException( ex.getMessage() ); |
| } |
| disposed = true; |
| } |
| } |
| |
| /** |
| * For easier debugging. |
| * <p> |
| * @return Basic info on this listener. |
| */ |
| @Override |
| public String toString() |
| { |
| final StringBuilder buf = new StringBuilder(); |
| buf.append( "\n RemoteCacheListener: " ); |
| buf.append( super.toString() ); |
| return buf.toString(); |
| } |
| } |