Java tutorial
/* * * $Date$ * $Author$ * $Revision$ * * 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 javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.commons.configuration.PropertiesConfiguration; import org.apache.log4j.Logger; import edu.lternet.pasta.client.EventSubscriptionClient; public class EventDeleteServlet extends DataPortalServlet { /** * Class variables */ private static final Logger logger = Logger.getLogger(edu.lternet.pasta.portal.EventDeleteServlet.class); private static final long serialVersionUID = 1L; private static final String forward = "./eventSubscribe.jsp"; /** * Constructor of the object. */ public EventDeleteServlet() { super(); } /** * 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 */ 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 */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession httpSession = request.getSession(); String uid = (String) httpSession.getAttribute("uid"); if (uid == null || uid.isEmpty()) uid = "public"; String subscriptionId = request.getParameter("subscriptionid"); String message = null; String type = null; if (uid.equals("public")) { message = LOGIN_WARNING; type = "warning"; } else { try { EventSubscriptionClient eventClient = new EventSubscriptionClient(uid); eventClient.deleteBySid(subscriptionId); message = "Event subscription with identifier '<b>" + subscriptionId + "</b>' has been deleted."; type = "info"; } catch (Exception e) { handleDataPortalError(logger, e); } } request.setAttribute("deletemessage", message); request.setAttribute("type", type); RequestDispatcher requestDispatcher = request.getRequestDispatcher(forward); requestDispatcher.forward(request, response); } /** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */ public void init() throws ServletException { PropertiesConfiguration options = ConfigurationListener.getOptions(); } }