001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019 020 // 021 // This source code implements specifications defined by the Java 022 // Community Process. In order to remain compliant with the specification 023 // DO NOT add / change / or delete method signatures! 024 // 025 026 package javax.servlet.http; 027 028 import java.util.EventListener; 029 030 /** 031 * This listener interface can be implemented in order to 032 * get notifications of changes to the attribute lists of sessions within 033 * this web application. 034 * 035 * @since Servlet 2.3 036 * 037 * @version $Rev: 467553 $ $Date: 2006-10-25 06:01:51 +0200 (Mi, 25. Okt 2006) $ 038 */ 039 public interface HttpSessionAttributeListener extends EventListener { 040 /** 041 * Notification that an attribute has been added to a session. Called after the attribute is added. 042 */ 043 public void attributeAdded(HttpSessionBindingEvent se); 044 045 /** 046 * Notification that an attribute has been removed from a session. Called after the attribute is removed. 047 */ 048 public void attributeRemoved(HttpSessionBindingEvent se); 049 050 /** 051 * Notification that an attribute has been replaced in a session. Called after the attribute is replaced. 052 */ 053 public void attributeReplaced(HttpSessionBindingEvent se); 054 } 055