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 java.util.ArrayList;
26  import java.util.Iterator;
27  import java.util.List;
28  
29  import javax.servlet.http.HttpSessionEvent;
30  import javax.servlet.http.HttpSessionListener;
31  
32  /**
33   * <a href="PortletSessionListenerManager.java.html"><b><i>View Source</i></b>
34   * </a>
35   *
36   * <p>
37   * See http://support.liferay.com/browse/LEP-2299.
38   * </p>
39   *
40   * @author Olaf Fricke
41   * @author Brian Wing Shun Chan
42   *
43   */
44  public class PortletSessionListenerManager implements HttpSessionListener {
45  
46      public static void addListener(HttpSessionListener listener) {
47          _listeners.add(listener);
48      }
49  
50      public static void removeListener(HttpSessionListener listener) {
51          _listeners.remove(listener);
52      }
53  
54      public void sessionCreated(HttpSessionEvent event) {
55          ClassLoader contextClassLoader =
56              Thread.currentThread().getContextClassLoader();
57  
58          try {
59              Iterator<HttpSessionListener> itr = _listeners.iterator();
60  
61              while (itr.hasNext()) {
62                  HttpSessionListener listener = itr.next();
63  
64                  ClassLoader listenerClassLoader =
65                      listener.getClass().getClassLoader();
66  
67                  Thread.currentThread().setContextClassLoader(
68                      listenerClassLoader);
69  
70                  listener.sessionCreated(event);
71              }
72          }
73          finally {
74              Thread.currentThread().setContextClassLoader(contextClassLoader);
75          }
76      }
77  
78      public void sessionDestroyed(HttpSessionEvent event) {
79          Iterator<HttpSessionListener> itr = _listeners.iterator();
80  
81          while (itr.hasNext()) {
82              HttpSessionListener listener = itr.next();
83  
84              listener.sessionDestroyed(event);
85          }
86      }
87  
88      private static List<HttpSessionListener> _listeners =
89          new ArrayList<HttpSessionListener>();
90  
91  }