Examples of org.hornetq.api.core.client.ClientConsumer

org.hornetq.api.core.client.ClientConsumer
A ClientConsumer receives messages from HornetQ queues.
Messages can be consumed synchronously by using the receive() methods which will block until a message is received (or a timeout expires) or asynchronously by setting a {@link MessageHandler}.
These 2 types of consumption are exclusive: a ClientConsumer with a MessageHandler set will throw HornetQException if its receive() methods are called. @author Tim Fox @author Clebert Suconic @author Andy Taylor @see ClientSession#createConsumer(String)


         session = sf.createSession(false, true, false);


         session.start();


         ClientConsumer consumerNonPaged = session.createConsumer(NON_PAGED_ADDRESS);
         ClientConsumer consumerPaged = session.createConsumer(PAGED_ADDRESS);


         ClientMessage ackList[] = new ClientMessage[NUMBER_OF_MESSAGES];


         for (int i = 0; i < NUMBER_OF_MESSAGES; i++)
         {
            ClientMessage msg = consumerNonPaged.receive(5000);
            Assert.assertNotNull(msg);
            ackList[i] = msg;
         }


         Assert.assertNull(consumerNonPaged.receiveImmediate());


         for (ClientMessage ack : ackList)
         {
            ack.acknowledge();
         }


         consumerNonPaged.close();


         session.commit();


         ackList = null;


         for (int i = 0; i < NUMBER_OF_MESSAGES; i++)
         {
            ClientMessage msg = consumerPaged.receive(5000);
            Assert.assertNotNull(msg);
            msg.acknowledge();
            session.commit();
         }


         Assert.assertNull(consumerPaged.receiveImmediate());


         session.close();


      }
      finally

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         session = sf.createSession(null, null, false, true, true, false, 0);


         session.start();


         ClientConsumer consumerA = session.createConsumer(PAGED_ADDRESS_A);


         ClientConsumer consumerB = session.createConsumer(PAGED_ADDRESS_B);


         for (int i = 0; i < NUMBER_OF_MESSAGES; i++)
         {
            ClientMessage msg = consumerA.receive(5000);
            Assert.assertNotNull("Couldn't receive a message on consumerA, iteration = " + i, msg);
            msg.acknowledge();
         }


         Assert.assertNull(consumerA.receiveImmediate());


         consumerA.close();


         Assert.assertTrue(server.getPostOffice().getPagingManager().getPageStore(PAGED_ADDRESS_B).isPaging());


         for (int i = 0; i < NUMBER_OF_MESSAGES; i++)
         {
            ClientMessage msg = consumerB.receive(5000);
            Assert.assertNotNull(msg);
            msg.acknowledge();
            session.commit();
         }


         Assert.assertNull(consumerB.receiveImmediate());


         consumerB.close();


         session.close();


      }
      finally

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               try
               {
                  sessionConsumer = sf.createSession(false, false);
                  sessionConsumer.start();


                  ClientConsumer cons = sessionConsumer.createConsumer(ADDRESS);


                  for (int i = 0; i < numberOfMessages; i++)
                  {
                     ClientMessage msg = cons.receive(PagingTest.RECEIVE_TIMEOUT);
                     System.out.println("Message " + i + " consumed");
                     assertNotNull(msg);
                     msg.acknowledge();


                     if (i % 20 == 0)

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         session.start();


         for (int nqueue = 0; nqueue < NQUEUES; nqueue++)
         {
            ClientConsumer consumer = session.createConsumer(PagingTest.ADDRESS.concat("=" + nqueue));


            for (int i = 0; i < (numberOfMessages / NQUEUES); i++)
            {
               message = consumer.receive(500000);
               assertNotNull(message);
               message.acknowledge();


               assertEquals(nqueue, message.getIntProperty("propTest").intValue());
            }


            assertNull(consumer.receiveImmediate());


            consumer.close();


            session.commit();
         }


         PagingStore store = server.getPagingManager().getPageStore(ADDRESS);

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         session.start();


         for (int msg = 1; msg <= 2; msg++)
         {
            ClientConsumer consumer = session.createConsumer(PagingTest.ADDRESS.concat("=" + msg));


            for (int i = 0; i < numberOfMessages; i++)
            {
               message = consumer.receive(500000);
               assertNotNull(message);
               message.acknowledge();


               // assertEquals(msg, message.getIntProperty("propTest").intValue());


               System.out.println("i = " + i + " msg = " + message.getIntProperty("propTest"));
            }


            session.commit();


            assertNull(consumer.receiveImmediate());


            consumer.close();
         }


         PagingStore store = server.getPagingManager().getPageStore(ADDRESS);
         store.getCursorProvier().cleanup();

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      assertEquals(0, queueControl.getDeliveringCount());


      session.start();


      ClientConsumer cons1 = session.createConsumer(queue.getAddress());


      assertNull(cons1.receiveImmediate());


      cons1.close();


      ClientConsumer cons2 = session.createConsumer(otherQueue.getAddress());


      for (int i = 0; i < 10; i++)
      {
         ClientMessage msg = cons2.receive(10000);


         assertNotNull(msg);


         msg.acknowledge();
      }


      cons2.close();


      session.close();


      sf.close();

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      assertEquals(0, queueControl.getDeliveringCount());


      session.start();


      ClientConsumer cons1 = session.createConsumer(queue.getAddress());


      assertNull(cons1.receiveImmediate());


      cons1.close();


      ClientConsumer cons2 = session.createConsumer(otherQueue.getAddress());


      for (int i = 0; i < 10; i++)
      {
         ClientMessage msg = cons2.receive(10000);


         assertNotNull(msg);


         msg.acknowledge();
      }


      cons2.close();


      session.close();


      sf.close();

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      assertEquals(0, queueControl.getDeliveringCount());


      session.start();


      ClientConsumer cons1 = session.createConsumer(queue.getAddress());


      assertNull(cons1.receiveImmediate());


      cons1.close();


      ClientConsumer cons2 = session.createConsumer(otherQueue.getAddress());


      msg = cons2.receive(10000);


      assertNotNull(msg);


      msg.acknowledge();


      cons2.close();


      session.close();


      sf.close();

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      session.start();
      
      ClientConsumer consumer = session.createConsumer(pagedQueue.getAddress());
      
      assertNull(consumer.receive(300));


      
      session.close();


      sf.close();

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      assertEquals(100, control.removeMessages("even=true"));
      
      session.start();
      
      ClientConsumer consumer = session.createConsumer(pagedQueue.getAddress());
      
      
      
      for (int i = 0 ; i < 100; i++)
      {
         ClientMessage msg = consumer.receive(1000);
         assertNotNull(msg);
         msg.acknowledge();
         assertFalse(msg.getBooleanProperty("even").booleanValue());
      }
      
      assertNull(consumer.receive(300));


      
      session.close();

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