SelectorPersistentQueue


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21  */
22  package org.jboss.mq.server;
23  
24  import javax.jms.JMSException  ;
25  
26  import org.jboss.mq.SpyTopic;
27  import org.jboss.mq.pm.Tx;
28  import org.jboss.mq.selectors.Selector;
29  
30  /**
31   *  This class adds a selector to a persistent queue.
32   *
33   *  Factored out of JMSTopic.
34   *
35   * @author     Adrian Brock (Adrian.Brock@HappeningTimes.com)
36   * @created    24th October 2002
37   */
38  public class SelectorPersistentQueue
39      extends PersistentQueue
40  {
41     // Attributes ----------------------------------------------------
42  
43     /**
44      * The string representation of the selector
45      */
46     String   selectorString;
47  
48     /**
49      * The implementation of the selector
50      */
51     Selector selector;
52  
53     // Constructor ---------------------------------------------------
54  
55     /**
56      * Create a new persistent queue with a selector
57      *
58      * @param server the destination manager
59      * @param dstopic the topic with a durable subscription
60      * @param selector the selector string
61      * @exception JMSException for an error
62      */
63     public SelectorPersistentQueue(JMSDestinationManager server, SpyTopic dstopic, String   selector, BasicQueueParameters parameters)
64        throws JMSException  
65     {
66        super(server, dstopic, parameters);
67        this.selectorString = selector;
68        this.selector = new Selector(selector);
69     }
70  
71     // Public --------------------------------------------------------
72            
73     /**
74      * Filters the message with the selector before adding to the queue
75  
76      * @param mesRef the message
77      * @param txId the transaction
78      * @exception JMSException for an error
79      */
80     public void addMessage(MessageReference mesRef, Tx txId)
81        throws JMSException  
82     {
83        if (selector.test(mesRef.getHeaders()))
84           super.addMessage( mesRef, txId );
85        else
86           server.getMessageCache().remove(mesRef);
87     }
88  }
89
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