1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20 package javax.servlet.http; 21 22 import java.util.EventListener; 23 24 /** 25 * Implementations of this interface are notified of changes to the 26 * list of active sessions in a web application. 27 * To receive notification events, the implementation class 28 * must be configured in the deployment descriptor for the web application. 29 * @see HttpSessionEvent 30 * @since v 2.3 31 */ 32 33 public interface HttpSessionListener extends EventListener { 34 35 /** 36 * Notification that a session was created. 37 * @param se the notification event 38 */ 39 public void sessionCreated ( HttpSessionEvent se ); 40 41 /** 42 * Notification that a session is about to be invalidated. 43 * @param se the notification event 44 */ 45 public void sessionDestroyed ( HttpSessionEvent se ); 46 47 } 48