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 package javax.servlet.http; 021 022 import java.util.EventListener; 023 024 /** 025 * Implementations of this interface are notified of changes to the 026 * list of active sessions in a web application. 027 * To receive notification events, the implementation class 028 * must be configured in the deployment descriptor for the web application. 029 * @see HttpSessionEvent 030 * @since v 2.3 031 */ 032 033 public interface HttpSessionListener extends EventListener { 034 035 /** 036 * Notification that a session was created. 037 * @param se the notification event 038 */ 039 public void sessionCreated ( HttpSessionEvent se ); 040 041 /** 042 * Notification that a session is about to be invalidated. 043 * @param se the notification event 044 */ 045 public void sessionDestroyed ( HttpSessionEvent se ); 046 047 } 048