public void init() {  
    rabbitTemplate.setReturnsCallback(  
            (ReturnedMessage returned) -> {  
                System.out.println("消息丢失: " + returned.getMessage());  
            }  
    );  
    rabbitTemplate.setBeforePublishPostProcessors((message) -> {  
        MessageProperties messageProperties = message.getMessageProperties();  
        String messageId = messageProperties.getMessageId();  
        System.out.println("messageId: " + messageId);  
        return message;  
    });  
  
}

public void testRabiitStart() throws InterruptedException {  
  
    CorrelationData  correlationData = new CorrelationData("1");  
    // 设置回调  
    rabbitTemplate.setConfirmCallback((correlationData1, ack, cause) -> {  
        System.out.println("cause: " + cause);  
        System.out.println("correlationData: " + correlationData1);  
        if (ack) {  
            System.out.println("消息发送成功");  
        } else {  
            System.out.println("消息发送失败");  
        }  
    });  
    // 队列名  
    String queueName = "queue.lyw";  
  
  
    // 发送消息, 如果没有队列会自动创建  
    rabbitTemplate.convertAndSend("direct.lyw", queueName, "hello rabbitmq", correlationData);  
  
}

public void testRabiitMqDelayMessage() {  
    CorrelationData  correlationData = new CorrelationData("1");  
    rabbitTemplate.convertAndSend("delay.direct", "delay.queue", "hello rabbitmq delay",  
                                  (Message message) -> {  
                                      message.getMessageProperties().setDelayLong(10000L);  
                                      return message;  
                                  }  
                                  , correlationData);  
}

spring:  
  application:  
    name: publisher  
  rabbitmq:  
    host: 192.168.208.128  
    port: 5672  
    username: user  
    password: password  
    virtual-host: /hmall  
    listener:  
      simple:  
        # 表示自动回应，当发送异常，将重试，重试不成功发送到死信队列（三种策略）
        acknowledge-mode: auto  
        retry:  
          enabled: true  
          max-attempts: 3  
          initial-interval: 1000  
          max-interval: 10000  
          multiplier: 2  
          stateless: true  
server:  
  port: 7082

@Bean  
public DirectExchange directExchange() {  
    return new DirectExchange("direct.lyw");  
}  
      
@Bean  
public Queue queue() {  
    return new Queue("queue.lyw");  
}  
      
@Bean  
public Binding binding(Queue queue, FanoutExchange fanoutExchange) {  
    return BindingBuilder.bind(queue).to(fanoutExchange);  
}

@RabbitListener(queues = "work.queue1")  
public void onMessageWorkerQueue2(String message) throws InterruptedException {  
    Thread.sleep(200);  
    Thread thread = Thread.currentThread();  
    log.info("工作队列2接收到消息: {}，时间：{},线程{}", message, LocalDateTime.now(), thread.getName());  
}

rabbitmq-plugins enable rabbitmq_delayed_message_exchange

@Bean  
public Queue delayQueue() {  
    return new Queue("delay.queue");  
}  
      
@Bean  
public DirectExchange delayExchange() {  
    return ExchangeBuilder.directExchange("delay.direct").delayed().durable(true).build();  
}  
      
@Bean Binding delayBinding(Queue delayQueue, DirectExchange delayExchange) {  
    return BindingBuilder.bind(delayQueue).to(delayExchange).with("delay.queue");  
}

@Test  
public void testRabiitMqDelayMessage() {  
    CorrelationData  correlationData = new CorrelationData("1");  
    rabbitTemplate.convertAndSend("delay.direct", "delay.queue", "hello rabbitmq delay",  
                                  (Message message) -> {  
                                      message.getMessageProperties().setDelayLong(10000L);  
                                      return message;  
                                  }  
                                  , correlationData);  
}  
      
@Test  
public void testRabiitMqDelayMessage2() {  
    rabbitTemplate.convertAndSend("delay.direct", "delay.queue", "1812793267355439105", message -> {  
        message.getMessageProperties().setDelayLong(10000L);  
        return message;  
    });  
}