1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   *
12   *
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.BasePortalLifecycle;
21  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
22  
23  import javax.servlet.ServletContext;
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      extends BasePortalLifecycle implements ServletContextListener {
36  
37      public PortalClassLoaderServletContextListener() {
38      }
39  
40      public void contextDestroyed(ServletContextEvent servletContextEvent) {
41          portalDestroy();
42      }
43  
44      public void contextInitialized(ServletContextEvent servletContextEvent) {
45          _servletContextEvent = servletContextEvent;
46  
47          ServletContext servletContext = servletContextEvent.getServletContext();
48  
49          _servletContextName = servletContext.getServletContextName();
50  
51          Thread currentThread = Thread.currentThread();
52  
53          _portletClassLoader = currentThread.getContextClassLoader();
54  
55          registerPortalLifecycle();
56      }
57  
58      protected void doPortalDestroy() {
59          PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
60          PortletClassLoaderUtil.setServletContextName(_servletContextName);
61  
62          Thread currentThread = Thread.currentThread();
63  
64          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
65  
66          try {
67              currentThread.setContextClassLoader(
68                  PortalClassLoaderUtil.getClassLoader());
69  
70              _servletContextListener.contextDestroyed(_servletContextEvent);
71          }
72          finally {
73              currentThread.setContextClassLoader(contextClassLoader);
74  
75              PortletClassLoaderUtil.setClassLoader(null);
76              PortletClassLoaderUtil.setServletContextName(null);
77          }
78      }
79  
80      protected void doPortalInit() {
81          PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
82          PortletClassLoaderUtil.setServletContextName(_servletContextName);
83  
84          Thread currentThread = Thread.currentThread();
85  
86          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
87  
88          try {
89              currentThread.setContextClassLoader(
90                  PortalClassLoaderUtil.getClassLoader());
91  
92              _servletContextListener = getInstance();
93  
94              _servletContextListener.contextInitialized(_servletContextEvent);
95          }
96          catch (Exception e) {
97              _log.error(e, e);
98          }
99          finally {
100             currentThread.setContextClassLoader(contextClassLoader);
101         }
102     }
103 
104     protected abstract ServletContextListener getInstance() throws Exception;
105 
106     private static Log _log = LogFactoryUtil.getLog(
107         PortalClassLoaderServletContextListener.class);
108 
109     private ServletContextEvent _servletContextEvent;
110     private ServletContextListener _servletContextListener;
111     private ClassLoader _portletClassLoader;
112     private String _servletContextName;
113 
114 }