trunk/apps/showcase/src/main/java/org/apache/struts2/showcase/chat/ChatInterceptor.java

/*
 * $Id$
 *
 * Copyright 2006 The Apache Software Foundation.
 *
 * Licensed 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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;

/**
 * Authenticate showcase chat example, make sure everyone have a username.
 */
public class ChatInterceptor implements Interceptor {
	
	private static final Log _log = LogFactory.getLog(ChatInterceptor.class);

	private static final long serialVersionUID = 1L;
	
	public static final String CHAT_USER_SESSION_KEY = "ChatUserSessionKey";

	public void destroy() {
	}

	public void init() {
	}

	public String intercept(ActionInvocation invocation) throws Exception {
		HttpSession session = (HttpSession) ActionContext.getContext().get(ActionContext.SESSION);
		User chatUser = (User) session.getAttribute(CHAT_USER_SESSION_KEY);
		if (chatUser == null) {
			_log.debug("Chat user not logged in");
			return Action.LOGIN;
		}
		return invocation.invoke();
	}
}