edu.lternet.pasta.portal.LogoutServlet.java Source code

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Here is the source code for edu.lternet.pasta.portal.LogoutServlet.java

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/*
 *
 * $Date$
 * $Author$
 * $Revision$
 *
 * Copyright 2011,2012 the University of New Mexico.
 *
 * This work was supported by National Science Foundation Cooperative
 * Agreements #DEB-0832652 and #DEB-0936498.
 *
 * 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 edu.lternet.pasta.portal;

import java.io.IOException;
import java.sql.SQLException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;
import org.apache.commons.configuration.PropertiesConfiguration;

import edu.lternet.pasta.token.TokenManager;

public class LogoutServlet extends DataPortalServlet {

    /**
     * Class variables
     */

    private static final Logger logger = Logger.getLogger(edu.lternet.pasta.portal.LogoutServlet.class);
    private static final long serialVersionUID = 1L;

    /**
     * Constructor of the object.
     */
    public LogoutServlet() {
        super();
    }

    /**
     * Destruction of the servlet. <br>
     */
    @Override
    public void destroy() {
        super.destroy(); // Just puts "destroy" string in log
        // Put your code here
    }

    /**
     * The doGet method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to get.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        // Pass request onto "doPost".
        doPost(request, response);

    }

    /**
     * The doPost method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to post.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        HttpSession httpSession = request.getSession();
        String uid = (String) httpSession.getAttribute("uid");

        if (uid == null) {
            logger.error("User identifier \"uid\" is null\n");
            httpSession.invalidate();
        } else {
            TokenManager tokenManager = new TokenManager();
            try {
                tokenManager.deleteToken(uid);
            } catch (Exception e) {
                handleDataPortalError(logger, e);
            } finally {
                httpSession.invalidate();
            }
        }

        RequestDispatcher requestDispatcher = request.getRequestDispatcher("./home.jsp");
        requestDispatcher.forward(request, response);

    }

    /**
     * Initialization of the servlet. <br>
     *
     * @throws ServletException if an error occurs
     */
    @Override
    public void init() throws ServletException {

        PropertiesConfiguration options = ConfigurationListener.getOptions();

    }

}