Question

如何在不使用自动确认的情况下手动确认消息。有没有办法将其与@RabbitListener和@EnableRabbit配置样式一起使用。大多数文档告诉我们使用SimpleMessageListenerContainer和ChannelAwareMessageListener。但是使用它会失去注释提供的灵活性。我已将我的服务配置如下：

@Service
public class EventReceiver {

@Autowired
private MessageSender messageSender;

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

  // code for processing order
}

我的RabbitConfiguration如下

@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;
}
}

如何根据上述配置风格调整手动通道确认，将不胜感激。如果我们实现ChannelAwareMessageListener，那么onMessage签名将会改变。我们可以在服务上实现ChannelAwareMessageListener吗？

Answer 1

将Channel添加到@RabbitListener方法...

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

并使用basicAck，basicReject。

中的标记

修改

@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

Answer 2

以防万一，您需要使用ChannelAwareMessageListener类中的#onMessage（）。然后，您可以通过这种方式进行操作。

@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);
}

}

对于rabbitConfiguration

@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;
}

}

Answer 3

感谢Gary的帮助。我终于解决了这个问题。我正在记录这个以造福他人。这需要在Spring AMQP参考文档页面中作为标准文档的一部分进行记录。服务等级如下。

   @Service
    public class Consumer {

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



 // the above methodname can be anything but should have channel as second signature

    channel.basicConsume(eventQueue, false, channel.getDefaultConsumer()); 
    // Get the delivery tag
    long deliveryTag = channel.basicGet(eventQueue, false).getEnvelope().getDeliveryTag();
    try {

      // code for processing order

    catch(Exception) {
     // handle exception
        channel.basicReject(deliveryTag, true);
    }
    // If all logic is successful 
    channel.basicAck(deliveryTag, false);
}

配置也已修改如下

public class RabbitApplication implements RabbitListenerConfigurer {

    private static final Logger log = LoggerFactory.getLogger(RabbitApplication .class);

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

    @Bean
    public MappingJackson2MessageConverter jackson2Converter() {
        MappingJackson2MessageConverter converter = new MappingJackson2MessageConverter();
        return converter;
    }

    @Bean
    public DefaultMessageHandlerMethodFactory myHandlerMethodFactory() {
        DefaultMessageHandlerMethodFactory factory = new DefaultMessageHandlerMethodFactory();
        factory.setMessageConverter(jackson2Converter());
        return factory;
    }

    @Autowired
    private Consumer consumer;

    @Override
    public void configureRabbitListeners(RabbitListenerEndpointRegistrar registrar) {
        registrar.setMessageHandlerMethodFactory(myHandlerMethodFactory());
    }

      ...
}

注意：不需要配置Rabbitconnectionfactory或containerfactor等，因为注释隐含处理所有这些。

Spring RabbitMQ - 在具有@RabbitListener配置的服务上使用手动通道确认

我的RabbitConfiguration如下

3 个答案: