001package org.apache.commons.jcs.engine.control.event.behavior;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022/**
023 * This interface defines the behavior for event handler. Event handlers are
024 * transient. They are not replicated and are not written to disk.
025 * <p>
026 * If you want an event handler by default for all elements in a region, then
027 * you can add it to the default element attributes. This way it will get created
028 * whenever an item gets put into the cache.
029 *
030 */
031public interface IElementEventHandler
032{
033    /**
034     * Handle events for this element. The events are typed.
035     *
036     * @param event
037     *            The event created by the cache.
038     */
039    <T> void handleElementEvent( IElementEvent<T> event );
040}