Java tutorial
/* * $Id: ChatSessionListener.java 471756 2006-11-06 15:01:43Z husted $ * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.struts2.showcase.chat; import javax.servlet.http.HttpSession; import javax.servlet.http.HttpSessionEvent; import javax.servlet.http.HttpSessionListener; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.web.context.WebApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; public class ChatSessionListener implements HttpSessionListener { private static final Log _log = LogFactory.getLog(ChatSessionListener.class); public void sessionCreated(HttpSessionEvent event) { } public void sessionDestroyed(HttpSessionEvent event) { HttpSession session = event.getSession(); WebApplicationContext context = WebApplicationContextUtils .getWebApplicationContext(session.getServletContext()); if (context != null) { User user = (User) session.getAttribute(ChatInterceptor.CHAT_USER_SESSION_KEY); if (user != null) { ChatService service = (ChatService) context.getBean("chatService"); service.logout(user.getName()); _log.info("session expired, logged user [" + user.getName() + "] out"); } } } }