插件

下载对应版本的 Delayed Message 插件

放到 /usr/lib/rabbitmq/lib/rabbitmq_server-x.x.x/plugins/

启用插件

rabbitmq-plugins enable rabbitmq_delayed_message_exchange

查看插件列表

rabbitmq-plugins list
# 对应插件前有[E*]则表示已启用(如未启用重启MQ)
service rabbitmq-server restart

代码

RabbitMqConfig

@Configuration
public class RabbitMqConfig {

  
    final static String DELAYED_QUEUE = "delayed_queue";
    final static String DELAYED_EXCHANGE = "delayed_exchange";

    /**
     * 使用自定义类型交换机类型：x-delayed-message
     */
    @Bean
    public CustomExchange delayedExchange() {
        Map<String, Object> args = new HashMap<>(4);
        args.put("x-delayed-type", "direct");
        return new CustomExchange(DELAYED_EXCHANGE, "x-delayed-message", true, false, args);
    }

    @Bean
    public Queue delayedQueue() {
        return new Queue(DELAYED_QUEUE);
    }

    @Bean
    public Binding pddActiveQueueBinding(Queue helloActiveQueue, CustomExchange helloActiveExchange) {
        return BindingBuilder.bind(pddActiveQueue).to(pddActiveExchange).with(DELAYED_QUEUE).noargs();
    }
    
}

MqSender

@Component
@RequiredArgsConstructor
public class MqSender {

    private final RabbitTemplate rabbitTemplate;

    /**
     * 发送消息
     */
    public void send(String msg, int delayMs) {
        rabbitTemplate.convertAndSend(
                RabbitMqConfig.DELAYED_EXCHANGE,
                RabbitMqConfig.DELAYED_QUEUE,
                msg,
                message -> {
                   //设置消息延迟时间
                    message.getMessageProperties().setDelay(delayMs);
                    return message;
                }
           );
    }
}

MqReceiver

@Component
@RequiredArgsConstructor
public class MqReceiver {

   @RabbitListener(queues = RabbitMqConfig.DELAYED_QUEUE)
    public void handle(String msg)  {
    	// TODO 消息处理
    }
}