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1   /*
2    * Copyright 2005-2010 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.ws.transport.context;
18  
19  /**
20   * Simple holder class that associates a <code>TransportContext</code> instance with the current thread. The
21   * <code>TransportContext</code> will be inherited by any child threads spawned by the current thread.
22   *
23   * @author Arjen Poutsma
24   * @see TransportContext
25   * @since 1.0.0
26   */
27  public abstract class TransportContextHolder {
28  
29      private static final ThreadLocal<TransportContext> transportContextHolder = new TransportThreadLocal();
30  
31      /**
32       * Associate the given <code>TransportContext</code> with the current thread.
33       *
34       * @param transportContext the current transport context, or <code>null</code> to reset the thread-bound context
35       */
36      public static void setTransportContext(TransportContext transportContext) {
37          transportContextHolder.set(transportContext);
38      }
39  
40      /**
41       * Return the <code>TransportContext</code> associated with the current thread, if any.
42       *
43       * @return the current transport context, or <code>null</code> if none
44       */
45      public static TransportContext getTransportContext() {
46          return transportContextHolder.get();
47      }
48  
49      private static class TransportThreadLocal extends ThreadLocal<TransportContext> {
50  
51          public String toString() {
52              return "Transport State";
53          }
54      }
55  }