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