1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.servlet;
16  
17  import com.liferay.portal.kernel.util.Validator;
18  
19  import java.util.Collection;
20  import java.util.Map;
21  import java.util.concurrent.ConcurrentHashMap;
22  
23  import javax.servlet.http.HttpSession;
24  
25  /**
26   * <a href="PortalSessionContext.java.html"><b><i>View Source</i></b></a>
27   *
28   * @author Brian Wing Shun Chan
29   */
30  public class PortalSessionContext {
31  
32      public static int count() {
33          return _instance._count();
34      }
35  
36      public static HttpSession get(String sessionId) {
37          return _instance._get(sessionId);
38      }
39  
40      public static void put(String sessionId, HttpSession session) {
41          _instance._put(sessionId, session);
42      }
43  
44      public static HttpSession remove(String sessionId) {
45          return _instance._remove(sessionId);
46      }
47  
48      public static Collection<HttpSession> values() {
49          return _instance._values();
50      }
51  
52      private PortalSessionContext() {
53          _sessionPool = new ConcurrentHashMap<String, HttpSession>();
54      }
55  
56      private int _count() {
57          return _sessionPool.size();
58      }
59  
60      private HttpSession _get(String sessionId) {
61          if (Validator.isNull(sessionId)) {
62              return null;
63          }
64  
65          return _sessionPool.get(sessionId);
66      }
67  
68      private void _put(String sessionId, HttpSession session) {
69          _sessionPool.put(sessionId, session);
70      }
71  
72      private HttpSession _remove(String sessionId) {
73          return _sessionPool.remove(sessionId);
74      }
75  
76      public Collection<HttpSession> _values() {
77          return _sessionPool.values();
78      }
79  
80      private static PortalSessionContext _instance = new PortalSessionContext();
81  
82      private Map<String, HttpSession> _sessionPool;
83  
84  }