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Spring RabbitMQ - utilisation de l'accusé de réception de canal manuel sur un service avec la configuration @RabbitListener

Comment acquitter manuellement les messages sans utiliser d'accusé de réception automatique. Existe-t-il un moyen de l'utiliser avec le @RabbitListener et @EnableRabbit style de configuration. La plupart de la documentation nous dit d'utiliser SimpleMessageListenerContainer avec ChannelAwareMessageListener. Cependant, en utilisant cela, nous perdons la flexibilité fournie avec les annotations. J'ai configuré mon service comme ci-dessous:

@Service
public class EventReceiver {

@Autowired
private MessageSender messageSender;

@RabbitListener(queues = "${eventqueue}")
public void receiveMessage(Order order) throws Exception {

  // code for processing order
}

Ma configuration de lapin est comme ci-dessous

@EnableRabbit
public class RabbitApplication implements RabbitListenerConfigurer {

public static void main(String[] args) {
    SpringApplication.run(RabbitApplication.class, args);
}

@Bean


public MappingJackson2MessageConverter jackson2Converter() {
        MappingJackson2MessageConverter converter = new  MappingJackson2MessageConverter();
        return converter;
    @Bean
public SimpleRabbitListenerContainerFactory myRabbitListenerContainerFactory() {
      SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
      factory.setConnectionFactory(rabbitConnectionFactory());
      factory.setMaxConcurrentConsumers(5);
      factory.setMessageConverter((MessageConverter) jackson2Converter());
      factory.setAcknowledgeMode(AcknowledgeMode.MANUAL);
      return factory;
    }

@Bean
public ConnectionFactory rabbitConnectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
    connectionFactory.setHost("localhost");
    return connectionFactory;
}

@Override
public void configureRabbitListeners(RabbitListenerEndpointRegistrar registrar) {
    registrar.setContainerFactory(myRabbitListenerContainerFactory());
}

@Autowired
private EventReceiver receiver;
}
}

Toute aide sera appréciée sur la façon d'adapter la reconnaissance manuelle des canaux avec le style de configuration ci-dessus. Si nous implémentons ChannelAwareMessageListener, la signature onMessage changera. Pouvons-nous implémenter ChannelAwareMessageListener sur un service?

javarabbitmqspring-amqpspring-rabbitmqspring-rabbit
13
Guru

Ajoutez le Channel au @RabbitListener méthode...

@RabbitListener(queues = "${eventqueue}")
public void receiveMessage(Order order, Channel channel,
    @Header(AmqpHeaders.DELIVERY_TAG) long tag) throws Exception {
    ...
}

et utilisez la balise dans basicAck, basicReject.

MODIFIER 

@SpringBootApplication
@EnableRabbit
public class So38728668Application {

    public static void main(String[] args) throws Exception {
        ConfigurableApplicationContext context = SpringApplication.run(So38728668Application.class, args);
        context.getBean(RabbitTemplate.class).convertAndSend("", "so38728668", "foo");
        context.getBean(Listener.class).latch.await(60, TimeUnit.SECONDS);
        context.close();
    }

    @Bean
    public Queue so38728668() {
        return new Queue("so38728668");
    }

    @Bean
    public Listener listener() {
        return new Listener();
    }

    public static class Listener {

        private final CountDownLatch latch = new CountDownLatch(1);

        @RabbitListener(queues = "so38728668")
        public void receive(String payload, Channel channel, @Header(AmqpHeaders.DELIVERY_TAG) long tag)
                throws IOException {
            System.out.println(payload);
            channel.basicAck(tag, false);
            latch.countDown();
        }

    }

}

application.properties:

spring.rabbitmq.listener.acknowledge-mode=manual
21
Gary Russell

Juste au cas où vous auriez besoin d'utiliser #onMessage () de la classe ChannelAwareMessageListener. Ensuite, vous pouvez le faire de cette façon.

@Component
public class MyMessageListener implements ChannelAwareMessageListener {

@Override
public void onMessage(Message message, Channel channel) {
    log.info("Message received.");
    // do something with the message
    channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
}

}

Et pour le lapinConfiguration

@Configuration
public class RabbitConfig {

public static final String topicExchangeName = "exchange1";

public static final String queueName = "queue1";

public static final String routingKey = "queue1.route.#";

@Bean
public ConnectionFactory connectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory("localhost");
    connectionFactory.setUsername("xxxx");
    connectionFactory.setPassword("xxxxxxxxxx");
    connectionFactory.setPort(5672);
    connectionFactory.setVirtualHost("vHost1");
    return connectionFactory;
}

@Bean
public RabbitTemplate rabbitTemplate() {
    return new RabbitTemplate(connectionFactory());
}

@Bean
Queue queue() {
    return new Queue(queueName, true);
}

@Bean
TopicExchange exchange() {
    return new TopicExchange(topicExchangeName);
}

@Bean
Binding binding(Queue queue, TopicExchange exchange) {
    return BindingBuilder.bind(queue).to(exchange).with(routingKey);
}


@Bean
public SimpleMessageListenerContainer listenerContainer(POCRabbitMessageListener pocRabbitMessageListener) {
    SimpleMessageListenerContainer listenerContainer = new SimpleMessageListenerContainer();
    listenerContainer.setConnectionFactory(connectionFactory());
    listenerContainer.setQueueNames(queueName);
    listenerContainer.setMessageListener(pocRabbitMessageListener);
    listenerContainer.setAcknowledgeMode(AcknowledgeMode.MANUAL);
    listenerContainer.setConcurrency("4");
    listenerContainer.setPrefetchCount(20);
    return listenerContainer;
}

}

4
Pari Ngang