Java tutorial
/* * mxHero is a platform that intends to provide a single point of development * and single point of distribution for email solutions and enhancements. It does this * by providing an extensible framework for rapid development and deployment of * email solutions. * * Copyright (C) 2012 mxHero Inc. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.mxhero.engine.plugin.attachmentlink.fileserver.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.StringUtils; import org.apache.log4j.Logger; import org.apache.log4j.MDC; import org.jasypt.encryption.pbe.StandardPBEStringEncryptor; import org.mxhero.engine.plugin.attachmentlink.fileserver.service.ContentService; import org.springframework.context.ApplicationContext; import org.springframework.dao.EmptyResultDataAccessException; import org.springframework.web.context.support.WebApplicationContextUtils; /** * @author mmarmol * */ public class Unsubscribe extends HttpServlet { private static Logger log = Logger.getLogger(Unsubscribe.class); /** * */ public Unsubscribe() { // TODO Auto-generated constructor stub } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doAction(req, resp); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doAction(req, resp); } private void doAction(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { ContentService service = null; Long idToSearch = null; String id = req.getParameter("id"); MDC.put("message", id); try { if (StringUtils.isEmpty(id)) { log.debug("Error. No params in URL present. Forwarding to error URL page"); req.getRequestDispatcher("/errorParams.jsp").forward(req, resp); } else { ApplicationContext context = WebApplicationContextUtils .getWebApplicationContext(getServletContext()); StandardPBEStringEncryptor encryptor = (StandardPBEStringEncryptor) context.getBean("encryptor"); String decrypt = encryptor.decrypt(id); idToSearch = Long.valueOf(decrypt); log.debug("Trying update files for messageId " + idToSearch); service = context.getBean(ContentService.class); service.unsubscribe(idToSearch); req.getRequestDispatcher("/unsubscribe.jsp").forward(req, resp); } } catch (EmptyResultDataAccessException e) { log.debug("Content not more available. Forwarding to not available page"); req.getRequestDispatcher("/contentNotAvailable.jsp").forward(req, resp); } catch (Exception e) { log.error("Exception: " + e.getClass().getName()); log.error("Message Exception: " + e.getMessage()); log.debug("Error General. Forwarding to page error general"); req.getRequestDispatcher("/error.jsp").forward(req, resp); } finally { MDC.put("message", id); } } }