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1   /*
2    * $Id: WeblogicJmsTopicResolver.java 20321 2010-11-24 15:21:24Z dfeist $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.transport.jms.weblogic;
12  
13  import org.mule.transport.jms.DefaultJmsTopicResolver;
14  import org.mule.transport.jms.Jms102bSupport;
15  import org.mule.transport.jms.JmsConnector;
16  import org.mule.util.ClassUtils;
17  
18  import java.lang.reflect.Method;
19  
20  import javax.jms.Destination;
21  import javax.jms.Queue;
22  import javax.jms.Topic;
23  
24  /**
25   * Weblogic-specific JMS topic resolver. Will use reflection and
26   * a vendor API to detect topics.
27   */
28  public class WeblogicJmsTopicResolver extends DefaultJmsTopicResolver
29  {
30      /**
31       * Cached empty class array, used in the no-args reflective method call.
32       */
33      protected static final Class[] PARAMETER_TYPES_NONE = new Class[0];
34  
35      /**
36       * Create an instance of the resolver.
37       *
38       * @param connector owning connector
39       */
40      public WeblogicJmsTopicResolver(final JmsConnector connector)
41      {
42          super(connector);
43      }
44  
45  
46      /**
47       * For Weblogic 8.x (JMS 1.0.2b) will use Weblogic-specific API call to test for topic.
48       * For Weblogic 9.x and later (JMS 1.1) this call is not required due to the unified
49       * messaging domains.
50       *
51       * @param destination a jms destination to test
52       * @return {@code true} if the destination is a topic
53       */
54      public boolean isTopic(final Destination destination)
55      {
56          // don't check the invariants, we already handle Weblogic's case here
57  
58          boolean topic = destination instanceof Topic;
59  
60          if (topic && destination instanceof Queue &&
61              getConnector().getJmsSupport() instanceof Jms102bSupport)
62          {
63              try
64              {
65                  Method topicMethod = ClassUtils.getPublicMethod(destination.getClass(), "isTopic", PARAMETER_TYPES_NONE);
66  
67                  topic = (Boolean) topicMethod.invoke(destination);
68              }
69              catch (Exception e)
70              {
71                  logger.warn(e.getMessage()); 
72              }
73          }
74          return topic;
75      }
76  
77  }