1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.kernel.servlet;
16  
17  import com.liferay.portal.kernel.log.Log;
18  import com.liferay.portal.kernel.log.LogFactoryUtil;
19  import com.liferay.portal.kernel.portlet.PortletClassLoaderUtil;
20  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
21  import com.liferay.portal.kernel.util.PortalInitable;
22  import com.liferay.portal.kernel.util.PortalInitableUtil;
23  
24  import javax.servlet.ServletContextEvent;
25  import javax.servlet.ServletContextListener;
26  
27  /**
28   * <a href="PortalClassLoaderServletContextListener.java.html"><b><i>View Source
29   * </i></b></a>
30   *
31   * @author Brian Wing Shun Chan
32   * @author Sandeep Soni
33   */
34  public abstract class PortalClassLoaderServletContextListener
35      implements PortalInitable, ServletContextListener {
36  
37      public PortalClassLoaderServletContextListener() {
38      }
39  
40      public void contextDestroyed(ServletContextEvent event) {
41          PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
42  
43          Thread currentThread = Thread.currentThread();
44  
45          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
46  
47          try {
48              currentThread.setContextClassLoader(
49                  PortalClassLoaderUtil.getClassLoader());
50  
51              _servletContextListener.contextDestroyed(event);
52          }
53          finally {
54              currentThread.setContextClassLoader(contextClassLoader);
55          }
56      }
57  
58      public void contextInitialized(ServletContextEvent event) {
59          _event = event;
60  
61          Thread currentThread = Thread.currentThread();
62  
63          _portletClassLoader = currentThread.getContextClassLoader();
64  
65          PortalInitableUtil.init(this);
66      }
67  
68      public void portalInit() {
69          PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
70  
71          Thread currentThread = Thread.currentThread();
72  
73          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
74  
75          try {
76              currentThread.setContextClassLoader(
77                  PortalClassLoaderUtil.getClassLoader());
78  
79              _servletContextListener = getInstance();
80  
81              _servletContextListener.contextInitialized(_event);
82          }
83          catch (Exception e) {
84              _log.error(e, e);
85          }
86          finally {
87              currentThread.setContextClassLoader(contextClassLoader);
88          }
89      }
90  
91      protected abstract ServletContextListener getInstance() throws Exception;
92  
93      private static Log _log = LogFactoryUtil.getLog(
94          PortalClassLoaderServletContextListener.class);
95  
96      private ServletContextEvent _event;
97      private ServletContextListener _servletContextListener;
98      private ClassLoader _portletClassLoader;
99  
100 }