spring boot amqp实现延迟队列功能

@Configuration
public class MQConfig {
    /**
     * 发送到该队列的message会在一段时间后过期进入到delay_process_queue
     * 队列里所有的message都有统一的失效时间
     */
    public final static String DELAY_QUEUE_PER_QUEUE_TTL_NAME = "delay_queue_per_queue_ttl";
    final static int QUEUE_EXPIRATION = 10000;

    /**
     * message失效后进入的队列，也就是实际的消费队列
     */
    final static String DELAY_PROCESS_QUEUE_NAME = "delay_process_queue";

    /**
     * DLX
     */
    final static String DELAY_EXCHANGE_NAME = "delay_exchange";

    /**
     * 路由到delay_queue_per_queue_ttl的exchange
     */
    public final static String PER_QUEUE_TTL_EXCHANGE_NAME = "per_queue_ttl_exchange";

    @Bean
    public ConnectionFactory connectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory("192.168.10.151");
        connectionFactory.setUsername("myc");
        connectionFactory.setPassword("myc");
//        connectionFactory.setPublisherConfirms(true);
        return connectionFactory;
    }

    @Bean
    public AmqpAdmin amqpAdmin() {
        return new RabbitAdmin(connectionFactory());
    }

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public RabbitTemplate amqpTemplate() {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
        return rabbitTemplate;
    }

    /**
     * 创建DLX exchangedelayQueuePerMessageTTL
     *
     * @return
     */
    @Bean
    DirectExchange delayExchange() {
        return new DirectExchange(DELAY_EXCHANGE_NAME);
    }

    /**
     * 创建per_queue_ttl_exchange
     *
     * @return
     */
    @Bean
    DirectExchange perQueueTTLExchange() {
        return new DirectExchange(PER_QUEUE_TTL_EXCHANGE_NAME);
    }


    /**
     * 创建delay_queue_per_queue_ttl队列
     *
     * @return
     */
    @Bean
    Queue delayQueuePerQueueTTL() {
        return QueueBuilder.durable(DELAY_QUEUE_PER_QUEUE_TTL_NAME)
                .withArgument("x-dead-letter-exchange", DELAY_EXCHANGE_NAME) // DLX
                .withArgument("x-dead-letter-routing-key", DELAY_PROCESS_QUEUE_NAME) // dead letter携带的routing key
                .withArgument("x-message-ttl", QUEUE_EXPIRATION) // 设置队列的过期时间
                .build();
    }

    /**
     * 创建delay_process_queue队列，也就是实际消费队列
     *
     * @return
     */
    @Bean
    Queue delayProcessQueue() {
        return QueueBuilder.durable(DELAY_PROCESS_QUEUE_NAME)
                .build();
    }

    /**
     * 将DLX绑定到实际消费队列
     *
     * @param delayProcessQueue
     * @param delayExchange
     * @return
     */
    @Bean
    Binding dlxBinding(Queue delayProcessQueue, DirectExchange delayExchange) {
        return BindingBuilder.bind(delayProcessQueue)
                .to(delayExchange)
                .with(DELAY_PROCESS_QUEUE_NAME);
    }

    /**
     * 将per_queue_ttl_exchange绑定到delay_queue_per_queue_ttl队列
     *
     * @param delayQueuePerQueueTTL
     * @param perQueueTTLExchange
     * @return
     */
    @Bean
    Binding queueTTLBinding(Queue delayQueuePerQueueTTL, DirectExchange perQueueTTLExchange) {
        return BindingBuilder.bind(delayQueuePerQueueTTL)
                .to(perQueueTTLExchange)
                .with(DELAY_QUEUE_PER_QUEUE_TTL_NAME);
    }

消息的生产者:

amqpTemplate.convertAndSend(MQConfig.PER_QUEUE_TTL_EXCHANGE_NAME, MQConfig.DELAY_QUEUE_PER_QUEUE_TTL_NAME, "aa");