Package javax.jms

Examples of javax.jms.MessageConsumer

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      conn.start();

      Session sessConsume1 = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);

      MessageConsumer cons1 = sessConsume1.createDurableSubscriber(topic, "sub1");

      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.createDurableSubscriber(topic, "sub1");

      //this should cancel message and cause delivery to other consumer

      sessConsume1.close();

      TextMessage tm3 = (TextMessage)cons2.receive(1000);

      assertNotNull(tm3);

      assertEquals("Your mum", tm3.getText());
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         connReceive.start();

         Session sessReceive = connReceive.createSession(true, Session.SESSION_TRANSACTED);

         MessageConsumer cons = sessReceive.createConsumer(queue2);

         TextMessage m2 = (TextMessage)cons.receive(1500);

         assertNotNull(m2);

         assertEquals("hello", m2.getText());

         //It is legal to close the consumer before committing the tx which is when
         //the acks are sent
         cons.close();

         sessReceive.commit();

         connReceive.close();
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      queueConsumer.close();
      consumerSession.commit();

      // I expect that "Two" is still in the queue

      MessageConsumer queueConsumer2 = consumerSession.createConsumer(queue);
      m =  (TextMessage)queueConsumer2.receive(1500);
      assertNotNull(m);
      assertEquals(m.getText(), "Two");

      consumerSession.commit();
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          prod.send(tm1);
          prod.send(tm2);
          prod.send(tm3);
          sess.commit();

          MessageConsumer cons1 = sess.createConsumer(queue);

          TextMessage rm1 = (TextMessage)cons1.receive();
          assertNotNull(rm1);
          assertEquals("a", rm1.getText());

          cons1.close();

          MessageConsumer cons2 = sess.createConsumer(queue);

          sess.commit();

          TextMessage rm2 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm2);
          assertEquals("b", rm2.getText());

          TextMessage rm3 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm3);
          assertEquals("c", rm3.getText());

          TextMessage rm4 = (TextMessage)cons2.receive(1500);
          assertNull(rm4);


       }
       finally
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          prod.send(tm1);
          prod.send(tm2);
          prod.send(tm3);
          sess.commit();

          MessageConsumer cons1 = sess.createConsumer(queue);

          TextMessage rm1 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm1);
          assertEquals("hello1", rm1.getText());

          cons1.close();

          MessageConsumer cons2 = sess.createConsumer(queue);

          sess.commit();

          TextMessage rm2 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm2);
          assertEquals("hello2", rm2.getText());

          TextMessage rm3 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm3);
          assertEquals("hello3", rm3.getText());

          TextMessage rm4 = (TextMessage)cons2.receive(1500);
          assertNull(rm4);


       }
       finally
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          prod.send(tm1);
          prod.send(tm2);
          prod.send(tm3);
          sess.commit();

          MessageConsumer cons1 = sess.createConsumer(queue);

          TextMessage rm1 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm1);
          assertEquals("hello1", rm1.getText());

          cons1.close();

          sess.commit();

          MessageConsumer cons2 = sess.createConsumer(queue);

          TextMessage rm2 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm2);
          assertEquals("hello2", rm2.getText());

          TextMessage rm3 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm3);
          assertEquals("hello3", rm3.getText());

          TextMessage rm4 = (TextMessage)cons2.receive(1500);
          assertNull(rm4);


       }
       finally
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          prod.send(tm1);
          prod.send(tm2);
          prod.send(tm3);
          sess.commit();

          MessageConsumer cons1 = sess.createConsumer(queue);

          TextMessage rm1 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm1);
          assertEquals("hello1", rm1.getText());
          log.trace(rm1.getJMSMessageID());

          log.trace("rolling back");
          //rollback should cause redelivery of messages not acked
          sess.rollback();
          log.trace("rolled back");

          TextMessage rm2 = (TextMessage)cons1.receive(1500);
          assertEquals("hello1", rm2.getText());
          log.trace(rm1.getJMSMessageID());

          TextMessage rm3 = (TextMessage)cons1.receive(1500);
          assertEquals("hello2", rm3.getText());

          TextMessage rm4 = (TextMessage)cons1.receive(1500);
          assertEquals("hello3", rm4.getText());

          //This last step is important - there shouldn't be any more messages to receive
          TextMessage rm5 = (TextMessage)cons1.receive(1500);
          assertNull(rm5);

       }
       finally
       {
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          prod.send(tm1);
          prod.send(tm2);
          prod.send(tm3);
          sess.commit();

          MessageConsumer cons1 = sess.createConsumer(queue);

          TextMessage rm1 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm1);
          assertEquals("hello1", rm1.getText());

          cons1.close();

          //Cancelling is asynch so can take some time
          Thread.sleep(500);
         
          //rollback should cause redelivery of messages

          //in this case redelivery occurs to a different receiver

          sess.rollback();

          MessageConsumer cons2 = sess.createConsumer(queue);

          TextMessage rm2 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm2);
          assertEquals("hello1", rm2.getText());

          TextMessage rm3 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm3);
          assertEquals("hello2", rm3.getText());

          TextMessage rm4 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm4);
          assertEquals("hello3", rm4.getText());

          //This last step is important - there shouldn't be any more messages to receive
          TextMessage rm5 = (TextMessage)cons2.receive(1500);
          assertNull(rm5);


       }
       finally
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          TextMessage tm3 = sess.createTextMessage("hello3");
          prod.send(tm1);
          prod.send(tm2);
          prod.send(tm3);

          MessageConsumer cons1 = sess.createConsumer(queue);

          TextMessage rm1 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm1);
          assertEquals("hello1", rm1.getText());

          //redeliver
          sess.recover();

          TextMessage rm2 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm2);
          assertEquals("hello1", rm2.getText());

          TextMessage rm3 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm3);
          assertEquals("hello2", rm3.getText());

          TextMessage rm4 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm4);
          assertEquals("hello3", rm4.getText());


          //This last step is important - there shouldn't be any more messages to receive
          TextMessage rm5 = (TextMessage)cons1.receive(1500);
          assertNull(rm5);
       }
       finally
       {
          if (conn != null)
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          TextMessage tm3 = sess.createTextMessage("hello3");
          prod.send(tm1);
          prod.send(tm2);
          prod.send(tm3);

          MessageConsumer cons1 = sess.createConsumer(queue);

          TextMessage rm1 = (TextMessage)cons1.receive(1500);
          assertNotNull(rm1);
          assertEquals("hello1", rm1.getText());

          cons1.close();
 
          //Give time for asynch cancel to happen
          Thread.sleep(500);

          log.debug("sess.recover()");

          //redeliver
          sess.recover();

          MessageConsumer cons2 = sess.createConsumer(queue);

          log.debug("receiving ...");

          TextMessage rm2 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm2);
          assertEquals("hello1", rm2.getText());

          TextMessage rm3 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm3);
          assertEquals("hello2", rm3.getText());

          TextMessage rm4 = (TextMessage)cons2.receive(1500);
          assertNotNull(rm4);
          assertEquals("hello3", rm4.getText());


          //This last step is important - there shouldn't be any more messages to receive
          TextMessage rm5 = (TextMessage)cons2.receive(1500);
          assertNull(rm5);


       }
       finally
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