1   /**
2    * Copyright (c) 2000-2009 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.servlet;
24  
25  import com.liferay.portal.kernel.util.Validator;
26  
27  import java.util.Collection;
28  import java.util.Map;
29  import java.util.concurrent.ConcurrentHashMap;
30  
31  import javax.servlet.http.HttpSession;
32  
33  /**
34   * <a href="PortalSessionContext.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Brian Wing Shun Chan
37   *
38   */
39  public class PortalSessionContext {
40  
41      public static int count() {
42          return _instance._count();
43      }
44  
45      public static HttpSession get(String sessionId) {
46          return _instance._get(sessionId);
47      }
48  
49      public static void put(String sessionId, HttpSession session) {
50          _instance._put(sessionId, session);
51      }
52  
53      public static HttpSession remove(String sessionId) {
54          return _instance._remove(sessionId);
55      }
56  
57      public static Collection<HttpSession> values() {
58          return _instance._values();
59      }
60  
61      private PortalSessionContext() {
62          _sessionPool = new ConcurrentHashMap<String, HttpSession>();
63      }
64  
65      private int _count() {
66          return _sessionPool.size();
67      }
68  
69      private HttpSession _get(String sessionId) {
70          if (Validator.isNull(sessionId)) {
71              return null;
72          }
73  
74          return _sessionPool.get(sessionId);
75      }
76  
77      private void _put(String sessionId, HttpSession session) {
78          _sessionPool.put(sessionId, session);
79      }
80  
81      private HttpSession _remove(String sessionId) {
82          return _sessionPool.remove(sessionId);
83      }
84  
85      public Collection<HttpSession> _values() {
86          return _sessionPool.values();
87      }
88  
89      private static PortalSessionContext _instance = new PortalSessionContext();
90  
91      private Map<String, HttpSession> _sessionPool;
92  
93  }