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1   /* 
2    * Copyright (c) 2007, Fraunhofer-Gesellschaft
3    * All rights reserved.
4    * 
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions are
7    * met:
8    * 
9    * (1) Redistributions of source code must retain the above copyright
10   *     notice, this list of conditions and the disclaimer at the end.
11   *     Redistributions in binary form must reproduce the above copyright
12   *     notice, this list of conditions and the following disclaimer in
13   *     the documentation and/or other materials provided with the
14   *     distribution.
15   * 
16   * (2) Neither the name of Fraunhofer nor the names of its
17   *     contributors may be used to endorse or promote products derived
18   *     from this software without specific prior written permission.
19   * 
20   * DISCLAIMER
21   * 
22   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33   *  
34   */
35  package org.ogf.graap.wsag.wsrf.bootstrap;
36  
37  import org.apache.muse.ws.addressing.MessageHeaders;
38  
39  /**
40   * WSAG4JContextRegistry
41   * 
42   * @author Oliver Waeldrich
43   * 
44   */
45  public class BootstrapRegistry
46  {
47  
48      private static ThreadLocal<MessageHeaders> tlContext = null;
49  
50      /**
51       * This method cleans up the {@link ThreadLocal} in order to prevent memory leaks. It is invoked by the
52       * {@link WSAG4JContextListener} when the web application context is destroyed on server shutdown.
53       * 
54       * @see WSAG4JContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
55       */
56      public static synchronized void finalizeBootstrapRegistry()
57      {
58          //
59          // prevent memory leak
60          //
61          if ( tlContext != null )
62          {
63              tlContext.set( null );
64              tlContext = null;
65          }
66      }
67  
68      private static synchronized ThreadLocal<MessageHeaders> getContext()
69      {
70          if ( tlContext == null )
71          {
72              tlContext = new ThreadLocal<MessageHeaders>();
73          }
74          return tlContext;
75      }
76  
77      /**
78       * Returns the addressing context for the current invocation.
79       * 
80       * @return the addressing context
81       */
82      public static MessageHeaders getAddressingContext()
83      {
84          return getContext().get();
85      }
86  
87      /**
88       * Registers the addressing context for the current invocation.
89       * 
90       * @param context
91       *            the addressing context
92       */
93      public static void registerAddressingContext( MessageHeaders context )
94      {
95          getContext().set( context );
96      }
97  }