SpringCoud Stream 实现延时消息队列

配置文件创建Sink创建Source创建消费者创建生产者启动服务后RabbitMq页面显示交换机情况队列情况调用效果

快速根据代码进行上手，后面补充原理。。。。

spring.rabbitmq.host=******
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.rabbitmq.virtual-host=/

#消费者开启延时队列支持
spring.cloud.stream.rabbit.bindings.input-channe.consumer.delayed-exchange=true
#生产者开启延时队列支持
spring.cloud.stream.rabbit.bindings.onput-channe.producer.delayed-exchange=true
#指定消息所属exchange
spring.cloud.stream.bindings.input_channel.destination=my-exchange
#指定消费者分组，在多实例的时候必需指定，防止重复消费
spring.cloud.stream.bindings.input_channel.group=my-mq
#指定消息所属exchange
spring.cloud.stream.bindings.output_channel.destination=my-exchange
spring.cloud.stream.bindings.output_channel.group=my-mq

public interface MySink {

    String input_channel = "input_channel";

    @Input(input_channel)
    SubscribableChannel in();
}

public interface MySource {
    String output_channel = "output_channel";

    
    @Output(output_channel)
    MessageChannel out();
}

@Component
@EnableBinding(MySink.class)
@Log4j2
public class MyConsumer {

    @StreamListener(MySink.input_channel)
    public void input(Message> message){
        log.info("收到消息：{}", message.getPayload());

    }


}

@EnableBinding(MySource.class)
@Component
@Log4j2
public class MySender {
    @Autowired
    private MySource source;


    public String sendDelayedMessage(String body,
                                      Integer seconds) {

        Map message = new HashMap<>();
        message.put("body", body);
        source.out().send(
                MessageBuilder.withPayload(message)
                        .setHeader("x-delay", seconds * 1000)
                        .build()
        );
        log.info("发送延迟消息成功");
        return "SUCCESS";
    }

}

@RestController
@RequestMapping("/delayed")
@Log4j2
public class DelayedCtrl {

    @Autowired
    private MySender sender;


    @GetMapping("/delayed")
    public String sendDelayedMessage(@RequestParam("body") String body,
                                     @RequestParam("seconds") Integer seconds) {

        sender.sendDelayedMessage(body,seconds);
        return "SUCCESS";
    }
}