001    /**
002     * Copyright (c) 2000-2012 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.portlet.PortletClassLoaderUtil;
018    import com.liferay.portal.kernel.util.BasePortalLifecycle;
019    import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
020    
021    import javax.servlet.ServletContext;
022    import javax.servlet.ServletContextEvent;
023    import javax.servlet.ServletContextListener;
024    
025    /**
026     * @author Brian Wing Shun Chan
027     * @author Sandeep Soni
028     */
029    public abstract class PortalClassLoaderServletContextListener
030            extends BasePortalLifecycle implements ServletContextListener {
031    
032            public PortalClassLoaderServletContextListener() {
033            }
034    
035            public void contextDestroyed(ServletContextEvent servletContextEvent) {
036                    portalDestroy();
037            }
038    
039            public void contextInitialized(ServletContextEvent servletContextEvent) {
040                    _servletContextEvent = servletContextEvent;
041    
042                    ServletContext servletContext = servletContextEvent.getServletContext();
043    
044                    _servletContextName = servletContext.getServletContextName();
045    
046                    Thread currentThread = Thread.currentThread();
047    
048                    _portletClassLoader = currentThread.getContextClassLoader();
049    
050                    registerPortalLifecycle();
051            }
052    
053            @Override
054            protected void doPortalDestroy() {
055                    PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
056                    PortletClassLoaderUtil.setServletContextName(_servletContextName);
057    
058                    Thread currentThread = Thread.currentThread();
059    
060                    ClassLoader contextClassLoader = currentThread.getContextClassLoader();
061    
062                    try {
063                            currentThread.setContextClassLoader(
064                                    PortalClassLoaderUtil.getClassLoader());
065    
066                            _servletContextListener.contextDestroyed(_servletContextEvent);
067                    }
068                    finally {
069                            currentThread.setContextClassLoader(contextClassLoader);
070    
071                            PortletClassLoaderUtil.setClassLoader(null);
072                            PortletClassLoaderUtil.setServletContextName(null);
073                    }
074            }
075    
076            @Override
077            protected void doPortalInit() throws Exception {
078                    PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
079                    PortletClassLoaderUtil.setServletContextName(_servletContextName);
080    
081                    Thread currentThread = Thread.currentThread();
082    
083                    ClassLoader contextClassLoader = currentThread.getContextClassLoader();
084    
085                    try {
086                            currentThread.setContextClassLoader(
087                                    PortalClassLoaderUtil.getClassLoader());
088    
089                            _servletContextListener = getInstance();
090    
091                            _servletContextListener.contextInitialized(_servletContextEvent);
092                    }
093                    finally {
094                            currentThread.setContextClassLoader(contextClassLoader);
095                    }
096            }
097    
098            protected abstract ServletContextListener getInstance() throws Exception;
099    
100            private ClassLoader _portletClassLoader;
101            private ServletContextEvent _servletContextEvent;
102            private ServletContextListener _servletContextListener;
103            private String _servletContextName;
104    
105    }