001/* 002 Licensed to the Apache Software Foundation (ASF) under one 003 or more contributor license agreements. See the NOTICE file 004 distributed with this work for additional information 005 regarding copyright ownership. The ASF licenses this file 006 to you under the Apache License, Version 2.0 (the 007 "License"); you may not use this file except in compliance 008 with the License. You may obtain a copy of the License at 009 010 http://www.apache.org/licenses/LICENSE-2.0 011 012 Unless required by applicable law or agreed to in writing, 013 software distributed under the License is distributed on an 014 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 KIND, either express or implied. See the License for the 016 specific language governing permissions and limitations 017 under the License. 018 */ 019package org.apache.wiki; 020 021import javax.servlet.*; 022import javax.servlet.http.*; 023import java.io.*; 024 025import net.sf.ehcache.CacheManager; 026import org.apache.log4j.Logger; 027 028import org.apache.wiki.url.DefaultURLConstructor; 029 030/** 031 * This provides a master servlet for dealing with short urls. It mostly does 032 * redirects to the proper JSP pages. It also intercepts the servlet 033 * shutdown events and uses it to signal wiki shutdown. 034 * 035 * @since 2.2 036 */ 037public class WikiServlet extends HttpServlet { 038 private static final long serialVersionUID = 3258410651167633973L; 039 private WikiEngine m_engine; 040 static final Logger log = Logger.getLogger(WikiServlet.class.getName()); 041 042 /** 043 * {@inheritDoc} 044 */ 045 public void init(ServletConfig config) 046 throws ServletException { 047 super.init(config); 048 049 m_engine = WikiEngine.getInstance(config); 050 051 log.info("WikiServlet initialized."); 052 } 053 054 /** 055 * Destroys the WikiServlet; called by the servlet container 056 * when shutting down the webapp. This method calls the 057 * protected method {@link WikiEngine#shutdown()}, which 058 * sends {@link org.apache.wiki.event.WikiEngineEvent#SHUTDOWN} 059 * events to registered listeners. 060 * 061 * @see javax.servlet.GenericServlet#destroy() 062 */ 063 public void destroy() { 064 log.info("WikiServlet shutdown."); 065 CacheManager.getInstance().shutdown(); 066 m_engine.shutdown(); 067 super.destroy(); 068 } 069 070 /** 071 * {@inheritDoc} 072 */ 073 public void doPost(HttpServletRequest req, HttpServletResponse res) 074 throws IOException, ServletException { 075 doGet(req, res); 076 } 077 078 /** 079 * {@inheritDoc} 080 */ 081 public void doGet(HttpServletRequest req, HttpServletResponse res) 082 throws IOException, ServletException { 083 String pageName = DefaultURLConstructor.parsePageFromURL(req, 084 m_engine.getContentEncoding()); 085 086 log.info("Request for page: " + pageName); 087 088 if (pageName == null) { 089 pageName = m_engine.getFrontPage(); // FIXME: Add special pages as well 090 } 091 092 String jspPage = m_engine.getURLConstructor().getForwardPage(req); 093 094 RequestDispatcher dispatcher = req.getRequestDispatcher("/" + jspPage + "?page=" 095 + m_engine.encodeName(pageName) + "&" + req.getQueryString()); 096 097 dispatcher.forward(req, res); 098 } 099}