001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.servlet;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
020    import com.liferay.portal.kernel.util.PortalInitable;
021    import com.liferay.portal.kernel.util.PortalInitableUtil;
022    
023    import java.io.IOException;
024    
025    import javax.servlet.ServletConfig;
026    import javax.servlet.ServletException;
027    import javax.servlet.http.HttpServlet;
028    import javax.servlet.http.HttpServletRequest;
029    import javax.servlet.http.HttpServletResponse;
030    
031    /**
032     * @author Brian Wing Shun Chan
033     */
034    public class PortalClassLoaderServlet
035            extends HttpServlet implements PortalInitable {
036    
037            public void destroy() {
038                    Thread currentThread = Thread.currentThread();
039    
040                    ClassLoader contextClassLoader = currentThread.getContextClassLoader();
041    
042                    try {
043                            currentThread.setContextClassLoader(
044                                    PortalClassLoaderUtil.getClassLoader());
045    
046                            _servlet.destroy();
047                    }
048                    finally {
049                            currentThread.setContextClassLoader(contextClassLoader);
050                    }
051            }
052    
053            public void init(ServletConfig servletConfig) {
054                    _servletConfig = servletConfig;
055    
056                    PortalInitableUtil.init(this);
057            }
058    
059            public void portalInit() {
060                    Thread currentThread = Thread.currentThread();
061    
062                    ClassLoader contextClassLoader = currentThread.getContextClassLoader();
063    
064                    ClassLoader portalClassLoader = PortalClassLoaderUtil.getClassLoader();
065    
066                    try {
067                            currentThread.setContextClassLoader(portalClassLoader);
068    
069                            String servletClass = _servletConfig.getInitParameter(
070                                    "servlet-class");
071    
072                            _servlet = (HttpServlet)portalClassLoader.loadClass(
073                                    servletClass).newInstance();
074    
075                            _servlet.init(_servletConfig);
076                    }
077                    catch (Exception e) {
078                            _log.error(e, e);
079                    }
080                    finally {
081                            currentThread.setContextClassLoader(contextClassLoader);
082                    }
083            }
084    
085            public void service(
086                            HttpServletRequest request, HttpServletResponse response)
087                    throws IOException, ServletException {
088    
089                    Thread currentThread = Thread.currentThread();
090    
091                    ClassLoader contextClassLoader = currentThread.getContextClassLoader();
092    
093                    try {
094                            currentThread.setContextClassLoader(
095                                    PortalClassLoaderUtil.getClassLoader());
096    
097                            _servlet.service(request, response);
098                    }
099                    finally {
100                            currentThread.setContextClassLoader(contextClassLoader);
101                    }
102            }
103    
104            private static Log _log = LogFactoryUtil.getLog(
105                    PortalClassLoaderServlet.class);
106    
107            private HttpServlet _servlet;
108            private ServletConfig _servletConfig;
109    
110    }