edu.indiana.d2i.sloan.ui.SessionTimeoutInterceptor.java Source code

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Here is the source code for edu.indiana.d2i.sloan.ui.SessionTimeoutInterceptor.java

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/*
#
# Copyright 2007 The Trustees of Indiana University
#
# 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.
#
# -----------------------------------------------------------------
#
# Project: HTRC Sloan job submission web interface
# File:  SessionTimeoutInterceptor.java
# Description:  
#
# -----------------------------------------------------------------
# 
 */
package edu.indiana.d2i.sloan.ui;

import java.util.Map;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

import edu.indiana.d2i.sloan.Constants;

/**
 * Class which handles session timeout.
 * 
 * @author Guangchen
 * 
 */
public class SessionTimeoutInterceptor extends AbstractInterceptor {
    private static final long serialVersionUID = 1L;
    private static final Log logger = LogFactory.getLog(SessionTimeoutInterceptor.class);

    @Override
    public String intercept(final ActionInvocation invocation) throws Exception {
        Object action = invocation.getAction();
        if (!(action instanceof SessionTimeoutRequired)) {
            return invocation.invoke();
        }

        Map<String, Object> session = invocation.getInvocationContext().getSession();
        if (session == null || session.isEmpty()) {
            HttpServletRequest httpRequest = ServletActionContext.getRequest();
            Cookie[] cookies = httpRequest.getCookies();
            for (int i = 0; i < cookies.length; i++) {
                if (cookies[i].getName().equals(Constants.SESSION_EXIST_BEFORE)
                        && (cookies[i].getValue().equals("true"))) {
                    logger.info("Session expired.");
                    session.put(Constants.SESSION_EXIST_BEFORE, new Boolean(true));
                    return "sessionexpiredRedirect";
                }
            }

        }
        return invocation.invoke();
    }
}