Examples of javax.jms.MessageConsumer

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

         
         Session producerSess = conn.createSession(true, Session.CLIENT_ACKNOWLEDGE);
         MessageProducer producer = producerSess.createProducer(queue);
         
         Session consumerSess = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
         MessageConsumer consumer = consumerSess.createConsumer(queue);
         conn.start();
         
         final int NUM_MESSAGES = 10;
         
         //Send some messages
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            Message m = producerSess.createMessage();
            producer.send(m);
         }
         
         producerSess.commit();
         
         log.trace("Sent messages");
         
         int count = 0;
         while (true)
         {
            Message m = consumer.receive(500);
            if (m == null) break;
            count++;
         }
         
         assertEquals(NUM_MESSAGES, count);

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         Session producerSess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         MessageProducer producer = producerSess.createProducer(queue);
   
         Session consumerSess = conn.createSession(true, Session.CLIENT_ACKNOWLEDGE);
         MessageConsumer consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         final int NUM_MESSAGES = 10;
   
         //Send some messages
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            Message m = producerSess.createMessage();
            producer.send(m);
         }
   
         log.trace("Sent messages");
   
         int count = 0;
         while (true)
         {
            Message m = consumer.receive(500);
            if (m == null) break;
            count++;
         }
   
         assertEquals(NUM_MESSAGES, count);
   
         conn.stop();
         consumer.close();
   
         conn.close();
   
         conn = cf.createConnection();
   
         consumerSess = conn.createSession(true, Session.CLIENT_ACKNOWLEDGE);
         consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         count = 0;
         while (true)
         {
            Message m = consumer.receive(500);
            if (m == null) break;
            count++;
         }
   
         assertEquals(NUM_MESSAGES, count);

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         Session producerSess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         MessageProducer producer = producerSess.createProducer(queue);
   
         Session consumerSess = conn.createSession(true, Session.CLIENT_ACKNOWLEDGE);
         MessageConsumer consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         final int NUM_MESSAGES = 10;
   
         //Send some messages
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            Message m = producerSess.createMessage();
            producer.send(m);
         }
   
         log.trace("Sent messages");
   
         int count = 0;
         while (true)
         {
            Message m = consumer.receive(500);
            if (m == null) break;
            count++;
         }
         
         log.trace("Received " + count + " messages");
   
         assertEquals(NUM_MESSAGES, count);
   
         consumerSess.commit();
         
         log.trace("Committed session");
   
         conn.stop();
         consumer.close();
   
         conn.close();
   
         conn = cf.createConnection();
   
         consumerSess = conn.createSession(true, Session.CLIENT_ACKNOWLEDGE);
         consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         Message m = consumer.receive(2000);
         
         log.trace("Message is " + m);
   
         assertNull(m);
      }

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         Session producerSess = conn.createSession(true, Session.AUTO_ACKNOWLEDGE);
         MessageProducer producer = producerSess.createProducer(queue);
   
         Session consumerSess = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
         MessageConsumer consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         final int NUM_MESSAGES = 10;
   
         //Send some messages
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            Message m = producerSess.createMessage();
            producer.send(m);
         }
   
         log.trace("Sent messages");
   
         producerSess.rollback();
   
         Message m = consumer.receive(2000);
   
         assertNull(m);
      }
      finally
      {

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         Session producerSess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         MessageProducer producer = producerSess.createProducer(queue);
   
         Session consumerSess = conn.createSession(true, Session.CLIENT_ACKNOWLEDGE);
         MessageConsumer consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         final int NUM_MESSAGES = 10;
   
         //Send some messages
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            Message m = producerSess.createMessage();
            producer.send(m);
         }
   
         log.trace("Sent messages");
   
         int count = 0;
         while (true)
         {
            Message m = consumer.receive(500);
            if (m == null) break;
            count++;
         }
   
         assertEquals(NUM_MESSAGES, count);
   
         consumerSess.rollback();
   
         conn.stop();
         consumer.close();
   
         conn.close();
   
         conn = cf.createConnection();
   
         consumerSess = conn.createSession(true, Session.CLIENT_ACKNOWLEDGE);
         consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         count = 0;
         while (true)
         {
            Message m = consumer.receive(500);
            if (m == null) break;
            count++;
         }
   
         assertEquals(NUM_MESSAGES, count);

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         Session producerSess = conn.createSession(true, Session.AUTO_ACKNOWLEDGE);
         MessageProducer producer = producerSess.createProducer(queue);
   
         Session consumerSess = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
         MessageConsumer consumer = consumerSess.createConsumer(queue);
         conn.start();
   
         final int NUM_MESSAGES = 10;
         final int NUM_TX = 10;
   
         //Send some messages
   
         for (int j = 0; j < NUM_TX; j++)
         {
   
            for (int i = 0; i < NUM_MESSAGES; i++)
            {
               Message m = producerSess.createMessage();
               producer.send(m);
            }
   
            producerSess.commit();
         }
   
         log.trace("Sent messages");
   
         int count = 0;
         while (true)
         {
            Message m = consumer.receive(500);
            if (m == null) break;
            count++;
         }
   
         assertEquals(NUM_MESSAGES * NUM_TX, count);

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


      try
      {
         MessageConsumer cons = sess.createDurableSubscriber(topic, subName);
         cons.close();
         sess.unsubscribe(subName);
         log.trace("Successfully created and unsubscribed subscription");
         return true;
      }
      catch (JMSSecurityException e)

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            prod.send(tm);
         }
         
         Session sess2 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
         
         MessageConsumer cons = sess2.createConsumer(queue);
         
         conn.start();
         
         for (int i = 0; i < NUM_MESSAGES; i++)
         {
            TextMessage tm = (TextMessage)cons.receive(500);
            
            assertNotNull(tm);
            
            assertEquals("message" + i, tm.getText());
         }

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      conn.start();


      final Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);


      MessageConsumer cons = sess.createConsumer(queue);


      final Object lock = new Object();


      final int numMessages = 100;




      class MyListener implements MessageListener
      {
         boolean failed;


         int count;


         public void onMessage(Message m)
         {
            try
            {
               MessageProducer prod = sess.createProducer(queue2);


               prod.send(m);


               count++;


               if (count == numMessages)
               {
                  synchronized (lock)
                  {
                     lock.notify();
                  }


               }
            }
            catch (JMSException e)
            {
               failed = true;
            }
         }
      }


      MyListener listener = new MyListener();


      cons.setMessageListener(listener);


      MessageProducer prod = sess.createProducer(queue);


      for (int i = 0; i < numMessages; i++)
      {

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         conn.start();
   
         Session sessConsume1 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
   
         MessageConsumer cons1 = sessConsume1.createConsumer(queue);
   
         TextMessage tm = sessSend.createTextMessage();
   
         tm.setText("Your mum");
   
         prod.send(tm);
   
         TextMessage tm2 = (TextMessage)cons1.receive();
   
         assertNotNull(tm2);
   
         assertEquals("Your mum", tm2.getText());
   
         // Don't ack
   
         // Create another consumer
   
         Session sessConsume2 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
   
         MessageConsumer cons2 = sessConsume2.createConsumer(queue);
   
         // this should cancel message and cause delivery to other consumer
   
         log.trace("Closed session 1");
         sessConsume1.close();
   
         TextMessage tm3 = (TextMessage)cons2.receive(1000);
   
         assertNotNull(tm3);
   
         assertEquals("Your mum", tm3.getText());

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