1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.servlet;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.portlet.PortletClassLoaderUtil;
28  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
29  import com.liferay.portal.kernel.util.PortalInitable;
30  import com.liferay.portal.kernel.util.PortalInitableUtil;
31  
32  import javax.servlet.ServletContextEvent;
33  import javax.servlet.ServletContextListener;
34  
35  /**
36   * <a href="PortalClassLoaderServletContextListener.java.html"><b><i>View Source
37   * </i></b></a>
38   *
39   * @author Brian Wing Shun Chan
40   * @author Sandeep Soni
41   *
42   */
43  public abstract class PortalClassLoaderServletContextListener
44      implements PortalInitable, ServletContextListener {
45  
46      public PortalClassLoaderServletContextListener() {
47      }
48  
49      public void contextDestroyed(ServletContextEvent event) {
50          PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
51  
52          ClassLoader contextClassLoader =
53              Thread.currentThread().getContextClassLoader();
54  
55          try {
56              Thread.currentThread().setContextClassLoader(
57                  PortalClassLoaderUtil.getClassLoader());
58  
59              _servletContextListener.contextDestroyed(event);
60          }
61          finally {
62              Thread.currentThread().setContextClassLoader(contextClassLoader);
63          }
64      }
65  
66      public void contextInitialized(ServletContextEvent event) {
67          _event = event;
68          _portletClassLoader = Thread.currentThread().getContextClassLoader();
69  
70          PortalInitableUtil.init(this);
71      }
72  
73      public void portalInit() {
74          PortletClassLoaderUtil.setClassLoader(_portletClassLoader);
75  
76          ClassLoader contextClassLoader =
77              Thread.currentThread().getContextClassLoader();
78  
79          try {
80              Thread.currentThread().setContextClassLoader(
81                  PortalClassLoaderUtil.getClassLoader());
82  
83              _servletContextListener = getInstance();
84  
85              _servletContextListener.contextInitialized(_event);
86          }
87          catch (Exception e) {
88              _log.error(e, e);
89          }
90          finally {
91              Thread.currentThread().setContextClassLoader(
92                  contextClassLoader);
93          }
94      }
95  
96      protected abstract ServletContextListener getInstance() throws Exception;
97  
98      private static Log _log =
99          LogFactoryUtil.getLog(PortalClassLoaderServletContextListener.class);
100 
101     private ServletContextEvent _event;
102     private ServletContextListener _servletContextListener;
103     private ClassLoader _portletClassLoader;
104 
105 }