Examples of org.springframework.amqp.rabbit.core.RabbitTemplate$ConfirmCallback

Package org.springframework.amqp.rabbit.core

Examples of org.springframework.amqp.rabbit.core.RabbitTemplate$ConfirmCallback

org.springframework.amqp.rabbit.core.RabbitTemplate

Helper class that simplifies synchronous RabbitMQ access (sending and receiving messages).

The default settings are for non-transactional messaging, which reduces the amount of data exchanged with the broker. To use a new transaction for every send or receive set the {@link #setChannelTransacted(boolean) channelTransacted}flag. To extend the transaction over multiple invocations (more efficient), you can use a Spring transaction to bracket the calls (with channelTransacted=true as well).

The only mandatory property is the {@link #setConnectionFactory(ConnectionFactory) ConnectionFactory}. There are strategies available for converting messages to and from Java objects ( {@link #setMessageConverter(MessageConverter) MessageConverter}) and for converting message headers (known as message properties in AMQP, see {@link #setMessagePropertiesConverter(MessagePropertiesConverter) MessagePropertiesConverter}). The defaults probably do something sensible for typical use cases, as long as the message content-type is set appropriately.

The "send" methods all have overloaded versions that allow you to explicitly target an exchange and a routing key, or you can set default values to be used in all send operations. The plain "receive" methods allow you to explicitly target a queue to receive from, or you can set a default value for the template that applies to all explicit receives. The convenience methods for send and receive use the sender defaults if no exchange or routing key is specified, but they always use a temporary queue for the receive leg, so the default queue is ignored.
@author Mark Pollack @author Mark Fisher @author Dave Syer @author Gary Russell @author Artem Bilan @since 1.0

    container.start();
    waitForNConsumers(container, 2);
    container.setConcurrentConsumers(1);
    waitForNConsumers(container, 1);
    container.setMaxConcurrentConsumers(3);
    RabbitTemplate template = new RabbitTemplate(singleConnectionFactory);
    for (int i = 0; i < 20; i++) {
      template.convertAndSend("foo", "foo");
    }
    waitForNConsumers(container, 2);    // increased consumers due to work
    waitForNConsumers(container, 1, 20000); // should stop the extra consumer after 10 seconds idle
    container.setConcurrentConsumers(3);
    waitForNConsumers(container, 3);

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      BlockingQueueConsumerIntegrationTests.class);


  @Test
  public void testTransactionalLowLevel() throws Exception {


    RabbitTemplate template = new RabbitTemplate();
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
    connectionFactory.setHost("localhost");
    connectionFactory.setPort(BrokerTestUtils.getPort());
    template.setConnectionFactory(connectionFactory);


    BlockingQueueConsumer blockingQueueConsumer = new BlockingQueueConsumer(connectionFactory,
        new DefaultMessagePropertiesConverter(), new ActiveObjectCounter<BlockingQueueConsumer>(),
        AcknowledgeMode.AUTO, true, 1, queue.getName());
    blockingQueueConsumer.start();


    // TODO: make this into a proper assertion. An exception can be thrown here by the Rabbit client and printed to
    // stderr without being rethrown (so hard to make a test fail).
    blockingQueueConsumer.stop();
    assertNull(template.receiveAndConvert(queue.getName()));
    connectionFactory.destroy();


  }

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    }
  }


  @Test
  public void testStopStart() throws Exception {
    RabbitTemplate template = context.getBean(RabbitTemplate.class);
    template.convertAndSend("testContainerWithAutoDeleteQueues", "anon", "foo");
    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
    this.listenerContainer1.stop();
    RabbitAdmin admin = spy(TestUtils.getPropertyValue(this.listenerContainer1, "rabbitAdmin", RabbitAdmin.class));
    new DirectFieldAccessor(this.listenerContainer1).setPropertyValue("rabbitAdmin", admin);
    this.listenerContainer1.start();
    template.convertAndSend("testContainerWithAutoDeleteQueues", "anon", "foo");
    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
    verify(admin, times(1)).initialize(); // should only be called by one of the consumers
  }

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    verify(admin, times(1)).initialize(); // should only be called by one of the consumers
  }


  @Test
  public void testStopStartConditionalDeclarations() throws Exception {
    RabbitTemplate template = context.getBean(RabbitTemplate.class);
    this.listenerContainer2.start();
    template.convertAndSend("otherExchange", "otherAnon", "foo");
    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
    this.listenerContainer2.stop();
    this.listenerContainer2.start();
    template.convertAndSend("otherExchange", "otherAnon", "foo");
    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
  }

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    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
  }


  @Test
  public void testRedeclareXExpiresQueue() throws Exception {
    RabbitTemplate template = context.getBean(RabbitTemplate.class);
    template.convertAndSend("xExpires", "foo");
    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
    SimpleMessageListenerContainer listenerContainer = context.getBean("container3",
        SimpleMessageListenerContainer.class);
    listenerContainer.stop();
    RabbitAdmin admin = spy(TestUtils.getPropertyValue(listenerContainer, "rabbitAdmin", RabbitAdmin.class));
    new DirectFieldAccessor(listenerContainer).setPropertyValue("rabbitAdmin", admin);
    int n = 0;
    while (admin.getQueueProperties("xExpires") != null && n < 100) {
      Thread.sleep(100);
      n++;
    }
    assertTrue(n < 100);
    listenerContainer.start();
    template.convertAndSend("xExpires", "foo");
    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
    verify(admin, times(1)).initialize(); // should only be called by one of the consumers
  }

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    verify(admin, times(1)).initialize(); // should only be called by one of the consumers
  }


  @Test
  public void testAutoDeclareFalse() throws Exception {
    RabbitTemplate template = context.getBean(RabbitTemplate.class);
    template.convertAndSend("testContainerWithAutoDeleteQueues", "anon2", "foo");
    assertNotNull(queue.poll(10, TimeUnit.SECONDS));
    SimpleMessageListenerContainer listenerContainer = context.getBean("container4",
        SimpleMessageListenerContainer.class);
    listenerContainer.stop();
    RabbitAdmin admin = spy(TestUtils.getPropertyValue(listenerContainer, "rabbitAdmin", RabbitAdmin.class));

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  @Test
  public void testListenerSendsMessageAndThenContainerCommits() throws Exception {


    ConnectionFactory connectionFactory = createConnectionFactory();
    RabbitTemplate template = new RabbitTemplate(connectionFactory);
    new RabbitAdmin(connectionFactory).declareQueue(sendQueue);


    acknowledgeMode = AcknowledgeMode.AUTO;
    transactional = true;


    CountDownLatch latch = new CountDownLatch(1);
    container = createContainer(queue.getName(), new ChannelSenderListener(sendQueue.getName(), latch, false),
        connectionFactory);
    template.convertAndSend(queue.getName(), "foo");


    int timeout = getTimeout();
    logger.debug("Waiting for messages with timeout = " + timeout + " (s)");
    boolean waited = latch.await(timeout, TimeUnit.SECONDS);
    assertTrue("Timed out waiting for message", waited);


    // Give message time to reach broker (intermittent test failures)!
    Thread.sleep(500L);
    // All messages committed
    byte[] bytes = (byte[]) template.receiveAndConvert(sendQueue.getName());
    assertNotNull(bytes);
    assertEquals("bar", new String(bytes));
    assertEquals(null, template.receiveAndConvert(queue.getName()));


    ((DisposableBean) connectionFactory).destroy();


  }

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  @Test
  public void testListenerSendsMessageAndThenRollback() throws Exception {


    ConnectionFactory connectionFactory = createConnectionFactory();
    RabbitTemplate template = new RabbitTemplate(connectionFactory);
    new RabbitAdmin(connectionFactory).declareQueue(sendQueue);


    acknowledgeMode = AcknowledgeMode.AUTO;
    transactional = true;


    CountDownLatch latch = new CountDownLatch(1);
    container = createContainer(queue.getName(), new ChannelSenderListener(sendQueue.getName(), latch, true),
        connectionFactory);
    template.convertAndSend(queue.getName(), "foo");


    int timeout = getTimeout();
    logger.debug("Waiting for messages with timeout = " + timeout + " (s)");
    boolean waited = latch.await(timeout, TimeUnit.SECONDS);
    assertTrue("Timed out waiting for message", waited);


    container.stop();
    Thread.sleep(200L);


    // Foo message is redelivered
    assertEquals("foo", template.receiveAndConvert(queue.getName()));
    // Sending of bar message is also rolled back
    assertNull(template.receiveAndConvert(sendQueue.getName()));


    ((DisposableBean) connectionFactory).destroy();


  }

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  @Test
  public void testListenerRecoversFromBogusDoubleAck() throws Exception {


    ConnectionFactory connectionFactory1 = createConnectionFactory();
    RabbitTemplate template = new RabbitTemplate(connectionFactory1);


    acknowledgeMode = AcknowledgeMode.MANUAL;


    CountDownLatch latch = new CountDownLatch(messageCount);
    ConnectionFactory connectionFactory2 = createConnectionFactory();
    container = createContainer(queue.getName(), new ManualAckListener(latch), connectionFactory2);
    for (int i = 0; i < messageCount; i++) {
      template.convertAndSend(queue.getName(), i + "foo");
    }


    int timeout = getTimeout();
    logger.debug("Waiting for messages with timeout = " + timeout + " (s)");
    boolean waited = latch.await(timeout, TimeUnit.SECONDS);
    assertTrue("Timed out waiting for message", waited);


    assertNull(template.receiveAndConvert(queue.getName()));


    ((DisposableBean) connectionFactory1).destroy();
    ((DisposableBean) connectionFactory2).destroy();
  }

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  @Test
  public void testListenerRecoversFromClosedChannel() throws Exception {


    ConnectionFactory connectionFactory1 = createConnectionFactory();
    RabbitTemplate template = new RabbitTemplate(connectionFactory1);


    CountDownLatch latch = new CountDownLatch(messageCount);
    ConnectionFactory connectionFactory2 = createConnectionFactory();
    container = createContainer(queue.getName(), new AbortChannelListener(latch), connectionFactory2);
    for (int i = 0; i < messageCount; i++) {
      template.convertAndSend(queue.getName(), i + "foo");
    }


    int timeout = getTimeout();
    logger.debug("Waiting for messages with timeout = " + timeout + " (s)");
    boolean waited = latch.await(timeout, TimeUnit.SECONDS);
    assertTrue("Timed out waiting for message", waited);


    assertNull(template.receiveAndConvert(queue.getName()));


    ((DisposableBean) connectionFactory1).destroy();
    ((DisposableBean) connectionFactory2).destroy();
  }

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