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.io.Serializable;
26  
27  import java.util.HashMap;
28  import java.util.HashSet;
29  import java.util.Iterator;
30  import java.util.Map;
31  import java.util.Set;
32  
33  import javax.servlet.http.HttpSession;
34  import javax.servlet.http.HttpSessionBindingEvent;
35  import javax.servlet.http.HttpSessionBindingListener;
36  
37  /**
38   * <a href="PortletSessionTracker.java.html"><b><i>View Source</i></b></a>
39   *
40   * <p>
41   * See http://support.liferay.com/browse/LEP-1466.
42   * </p>
43   *
44   * @author Rudy Hilado
45   *
46   */
47  public class PortletSessionTracker
48      implements HttpSessionBindingListener, Serializable {
49  
50      public static void add(HttpSession session) {
51          _instance._add(session);
52      }
53  
54      public static HttpSessionBindingListener getInstance() {
55          return _instance;
56      }
57  
58      public static void invalidate(String sessionId) {
59          _instance._invalidate(sessionId);
60      }
61  
62      public void valueBound(HttpSessionBindingEvent event) {
63      }
64  
65      public void valueUnbound(HttpSessionBindingEvent event) {
66          invalidate(event.getSession().getId());
67      }
68  
69      private PortletSessionTracker() {
70          _sessions = new HashMap<String, Set<HttpSession>>();
71      }
72  
73      private void _add(HttpSession session) {
74          String sessionId = session.getId();
75  
76          synchronized (_sessions) {
77              Set<HttpSession> portletSessions = _sessions.get(sessionId);
78  
79              if (portletSessions == null) {
80                  portletSessions = new HashSet<HttpSession>();
81  
82                  _sessions.put(sessionId, portletSessions);
83              }
84  
85              portletSessions.add(session);
86          }
87      }
88  
89      private void _invalidate(String sessionId) {
90          synchronized (_sessions) {
91              Set<HttpSession> portletSessions = _sessions.get(sessionId);
92  
93              if (portletSessions != null) {
94                  Iterator<HttpSession> itr = portletSessions.iterator();
95  
96                  while (itr.hasNext()) {
97                      HttpSession session = itr.next();
98  
99                      try {
100                         session.invalidate();
101                     }
102                     catch (Exception e) {
103                     }
104                 }
105             }
106 
107             _sessions.remove(sessionId);
108         }
109     }
110 
111     private static PortletSessionTracker _instance =
112         new PortletSessionTracker();
113 
114     private transient Map<String, Set<HttpSession>> _sessions;
115 
116 }