Examples of javax.jms.QueueBrowser

javax.jms.QueueBrowser
@version $Rev: 46019 $ $Date: 2004-09-14 03:56:06 -0600 (Tue, 14 Sep 2004) $

      
      try
      {
         conn = getConnection();
         session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         QueueBrowser browser = session.createBrowser(queue);
         
         ArrayList list = new ArrayList();
         for(Enumeration e = browser.getEnumeration(); e.hasMoreElements(); )
         {
            list.add(e.nextElement());
         }
         
         return list.size();

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         // create a connection to node 1
         conn = createConnectionOnServer(cf, 1);


         Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


         QueueBrowser browser = session.createBrowser(queue[1]);


         Enumeration en = browser.getEnumeration();
         assertFalse(en.hasMoreElements());


         // send one persistent and one non-persistent message


         MessageProducer prod = session.createProducer(queue[1]);
         prod.setDeliveryMode(DeliveryMode.PERSISTENT);
         prod.send(session.createTextMessage("click"));
         prod.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
         prod.send(session.createTextMessage("clack"));


         //Give time for the NP message to arrive
         Thread.sleep(2000);


         // register a failover listener
         SimpleFailoverListener failoverListener = new SimpleFailoverListener();
         ((JBossConnection)conn).registerFailoverListener(failoverListener);


         ServerManagement.kill(1);


         // wait for the client-side failover to complete


         while(true)
         {
            FailoverEvent event = failoverListener.getEvent(30000);
            if (event != null && FailoverEvent.FAILOVER_COMPLETED == event.getType())
            {
               break;
            }
            if (event == null)
            {
               fail("Did not get expected FAILOVER_COMPLETED event");
            }
         }


         // failover complete
         assertEquals(0, getServerId(conn));


         en = browser.getEnumeration();


         // we expect to only be able to browse the persistent message
         assertTrue(en.hasMoreElements());
         TextMessage tm = (TextMessage)en.nextElement();
         assertEquals("click", tm.getText());

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         // create a connection to node 1
         conn = createConnectionOnServer(cf, 1);


         Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


         QueueBrowser browser = session.createBrowser(queue[1]);


         Enumeration en = browser.getEnumeration();
         assertFalse(en.hasMoreElements());


         // register a failover listener
         SimpleFailoverListener failoverListener = new SimpleFailoverListener();
         ((JBossConnection)conn).registerFailoverListener(failoverListener);


         ServerManagement.kill(1);


         // wait for the client-side failover to complete


         while(true)
         {
            FailoverEvent event = failoverListener.getEvent(30000);
            if (event != null && FailoverEvent.FAILOVER_COMPLETED == event.getType())
            {
               break;
            }
            if (event == null)
            {
               fail("Did not get expected FAILOVER_COMPLETED event");
            }
         }


         // failover complete
         assertEquals(0, getServerId(conn));


         // send one persistent and one non-persistent message


         MessageProducer prod = session.createProducer(queue[1]);
         prod.setDeliveryMode(DeliveryMode.PERSISTENT);
         prod.send(session.createTextMessage("click"));
         prod.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
         prod.send(session.createTextMessage("clack"));


         //Give time for the NP message to arrive
         Thread.sleep(2000);


         en = browser.getEnumeration();


         // we expect to be able to browse persistent and non-persistent messages
         Set texts = new HashSet();


         assertTrue(en.hasMoreElements());

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            getDelegate()).getRemotingConnection();
         rc.removeConnectionListener();


         Session session1 = conn1.createSession(false, Session.AUTO_ACKNOWLEDGE);


         QueueBrowser browser = session1.createBrowser(queue[1]);


         ServerManagement.kill(1);


         browser.close();
      }
      finally
      {
         if (conn1 != null)
         {

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        // Get the first.
        assertEquals(outbound[0], consumer.receive(1000));
        consumer.close();


        QueueBrowser browser = session.createBrowser((Queue)destination);
        Enumeration enumeration = browser.getEnumeration();


        // browse the second
        assertTrue("should have received the second message", enumeration.hasMoreElements());
        assertEquals(outbound[1], (Message)enumeration.nextElement());


        // browse the third.
        assertTrue("Should have received the third message", enumeration.hasMoreElements());
        assertEquals(outbound[2], (Message)enumeration.nextElement());


        // There should be no more.
        boolean tooMany = false;
        while (enumeration.hasMoreElements()) {
            LOG.info("Got extra message: " + ((TextMessage)enumeration.nextElement()).getText());
            tooMany = true;
        }
        assertFalse(tooMany);
        browser.close();


        // Re-open the consumer.
        consumer = resourceProvider.createConsumer(session, destination);
        // Receive the second.
        assertEquals(outbound[1], consumer.receive(1000));

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        // Get the first.
        assertEquals(outbound[0], consumer.receive(1000));
        consumer.close();
        //Thread.sleep(200);


        QueueBrowser browser = session.createBrowser((Queue) destination);
        Enumeration enumeration = browser.getEnumeration();


        // browse the second
        assertTrue("should have received the second message", enumeration.hasMoreElements());
        assertEquals(outbound[1], (Message) enumeration.nextElement());


        // browse the third.
        assertTrue("Should have received the third message", enumeration.hasMoreElements());
        assertEquals(outbound[2], (Message) enumeration.nextElement());


        // There should be no more.
        boolean tooMany = false;
        while (enumeration.hasMoreElements()) {
            LOG.info("Got extra message: " + ((TextMessage) enumeration.nextElement()).getText());
            tooMany = true;
        }
        assertFalse(tooMany);
        browser.close();


        // Re-open the consumer.
        consumer = session.createConsumer(destination);
        // Receive the second.
        assertEquals(outbound[1], consumer.receive(1000));

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    {


        // create QueueBrowser
        _logger.info("Creating Queue Browser");


        QueueBrowser queueBrowser = _clientSession.createBrowser(_queue);


        // check for messages
        if (_logger.isDebugEnabled())
        {
            _logger.debug("Checking for " + expectedDepth + " messages with QueueBrowser");
        }


        //Check what the session believes the queue count to be.
        long queueDepth = 0;


        try
        {
            queueDepth = ((AMQSession) _clientSession).getQueueDepth((AMQDestination) _queue);
        }
        catch (AMQException e)
        {
        }


        assertEquals("Session reports Queue expectedDepth not as expected", expectedDepth, queueDepth);






        // Browse the queue to get a second opinion
        int msgCount = 0;
        Enumeration msgs = queueBrowser.getEnumeration();


        while (msgs.hasMoreElements())
        {
            msgs.nextElement();
            msgCount++;
        }


        if (_logger.isDebugEnabled())
        {
            _logger.debug("Found " + msgCount + " messages total in browser");
        }


        // check to see if all messages found
        assertEquals("Browser did not find all messages", expectedDepth, msgCount);


        //Close browser
        queueBrowser.close();
    }

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        queueBrowser.close();
    }


    protected void closeBrowserBeforeAfterGetNext(int messageCount) throws JMSException
    {
        QueueBrowser queueBrowser = _clientSession.createBrowser(_queue);


        Enumeration msgs = queueBrowser.getEnumeration();


        int msgCount = 0;


        while (msgs.hasMoreElements() && msgCount < messageCount)
        {
            msgs.nextElement();
            msgCount++;
        }


        try
        {
            queueBrowser.close();
        }
        catch (JMSException e)
        {
            fail("Close should happen without error:" + e.getMessage());
        }

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     * @param browserEnumerationCount The number of times to call getEnumeration()
     * @throws JMSException
     */
    protected void checkMultipleGetEnum(int sentMessages, int browserEnumerationCount) throws JMSException
    {
        QueueBrowser queueBrowser = _clientSession.createBrowser(_queue);


        for (int count = 0; count < browserEnumerationCount; count++)
        {
            _logger.info("Checking getEnumeration:" + count);
            Enumeration msgs = queueBrowser.getEnumeration();


            int msgCount = 0;


            while (msgs.hasMoreElements())
            {
                msgs.nextElement();
                msgCount++;
            }


            // Verify that the browser can see all the messages sent.
            assertEquals(sentMessages, msgCount);
        }


        try
        {
            queueBrowser.close();
        }
        catch (JMSException e)
        {
            fail("Close should happen without error:" + e.getMessage());
        }

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        checkOverlappingMultipleGetEnum(expectedMessages, browserEnumerationCount, null);
    }


    protected void checkOverlappingMultipleGetEnum(int expectedMessages, int browserEnumerationCount, String selector) throws JMSException
    {
        QueueBrowser queueBrowser = selector == null ?
                                _clientSession.createBrowser(_queue) : _clientSession.createBrowser(_queue);
//                _clientSession.createBrowser(_queue) : _clientSession.createBrowser(_queue, selector);


        Enumeration[] msgs = new Enumeration[browserEnumerationCount];
        int[] msgCount = new int[browserEnumerationCount];


        //create Enums
        for (int count = 0; count < browserEnumerationCount; count++)
        {
            msgs[count] = queueBrowser.getEnumeration();
        }


        //interleave reads
        for (int cnt = 0; cnt < expectedMessages; cnt++)
        {
            for (int count = 0; count < browserEnumerationCount; count++)
            {
                if (msgs[count].hasMoreElements())
                {
                    msgs[count].nextElement();
                    msgCount[count]++;
                }
            }
        }


        //validate all browsers get right message count.
        for (int count = 0; count < browserEnumerationCount; count++)
        {
            assertEquals(msgCount[count], expectedMessages);
        }


        try
        {
            queueBrowser.close();
        }
        catch (JMSException e)
        {
            fail("Close should happen without error:" + e.getMessage());
        }

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