001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.commons.io.cache;
020
021import java.io.Serializable;
022
023/**
024 * Ac CacheEventListener is registred to a cache implementing the interface CacheEvent, a CacheEventListener can listen to certain event happening in a cache
025 */
026public interface CacheEventListener extends Serializable {
027
028
029        /**
030         * this method is invoked before a Cache Entry is removed from Cache
031         * @param entry entry that will be removed from Cache
032         */
033        public void onRemove(CacheEntry entry);
034        
035        /**
036         * this method is invoked before a new Entry is putted to a cache (update and insert)
037         */
038        public void onPut(CacheEntry entry);
039        
040        /**
041         * this method is invoked before a entry expires (lifetime and idletime)
042         */
043        public void onExpires(CacheEntry entry);
044        
045        
046        public CacheEventListener duplicate();
047}