手把手带你掌握SpringBoot RabbitMQ延迟队列

$ docker cp /Users/ludangxin/Downloads/rabbitmq_delayed_message_exchange-3.8.9-0199d11c.ez rabbitmq:/opt/rabbitmq/plugins/

$ docker exec -it rabbitmq /bin/bash

$ rabbitmq-plugins list
# 输出部分内容如下 [E*] = 明确启用; e = 隐式启用
[  ] rabbitmq_amqp1_0                  3.8.3
[  ] rabbitmq_auth_backend_cache       3.8.3
[  ] rabbitmq_auth_backend_http        3.8.3
[  ] rabbitmq_auth_backend_ldap        3.8.3
[  ] rabbitmq_auth_backend_oauth2      3.8.3
[  ] rabbitmq_auth_mechanism_ssl       3.8.3
[  ] rabbitmq_consistent_hash_exchange 3.8.3
[  ] rabbitmq_event_exchange           3.8.3
[  ] rabbitmq_federation               3.8.3
[  ] rabbitmq_federation_management    3.8.3
[  ] rabbitmq_jms_topic_exchange       3.8.3
[E*] rabbitmq_management               3.8.3
[e*] rabbitmq_management_agent         3.8.3
[  ] rabbitmq_mqtt                     3.8.3

$ rabbitmq-plugins enable rabbitmq_delayed_message_exchange

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.springframework.amqp</groupId>
    <artifactId>spring-rabbit-test</artifactId>
    <scope>test</scope>
</dependency>

spring:
  rabbitmq:
    host: localhost
    port: 5672
    # rabbit 默认的虚拟主机
    virtual-host: /
    # rabbit 用户名密码
    username: admin
    password: admin123

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.QueueBuilder;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.HashMap;
import java.util.Map;

/**
 * 延迟队列配置
 *
 * @author ludangxin
 * @date 2021/9/16
 */
@Configuration
public class RabbitDelayedConfig {
    public static final String QUEUE_NAME_DELAYED = "DELAY.QUEUE";
    public static final String EXCHANGE_NAME_DELAYED = "DELAY.EXCHANGE";
    public static final String ROUTING_KEY_DELAYED = "DELAY.#";

    @Bean(QUEUE_NAME_DELAYED)
    public Queue queue() {
       return QueueBuilder.durable(QUEUE_NAME_DELAYED).build();
    }

    @Bean(EXCHANGE_NAME_DELAYED)
    public CustomExchange exchange() {
       Map<String, Object> arguments = new HashMap<>(1);
       // 在这里声明一个主题类型的延迟队列，当然其他类型的也可以。
       arguments.put("x-delayed-type", "topic");
       return new CustomExchange(EXCHANGE_NAME_DELAYED, "x-delayed-message", true, false, arguments);
    }

    @Bean
    public Binding bindingNotify(@Qualifier(QUEUE_NAME_DELAYED) Queue queue, @Qualifier(EXCHANGE_NAME_DELAYED) CustomExchange customExchange) {
       return BindingBuilder.bind(queue).to(customExchange).with(ROUTING_KEY_DELAYED).noargs();
    }
}

import com.ldx.rabbitmq.config.RabbitDelayedConfig;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * 延迟消息生产者
 *
 * @author ludangxin
 * @date 2021/9/9
 */
@Component
public class DelayProducer {

   @Autowired
   private RabbitTemplate rabbitTemplate;

   public void sendDelayedMsg(String msg, Integer delay) {
      MessageProperties mp = new MessageProperties();
      // 设置过期时间
      mp.setDelay(delay);
      Message message = new Message(msg.getBytes(), mp);
      rabbitTemplate.convertAndSend(RabbitDelayedConfig.EXCHANGE_NAME_DELAYED, "DELAY.MSG", message);
   }
}

import com.ldx.rabbitmq.config.RabbitDelayedConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * 延迟消息消费者
 *
 * @author ludangxin
 * @date 2021/9/9
 */
@Slf4j
@Component
public class DelayConsumer {

    @RabbitListener(queues = {RabbitDelayedConfig.QUEUE_NAME_DELAYED})
    public void delayQueue(Message message){
        log.info(new String(message.getBody()) + "，结束时间为：" + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
    }

}

@Autowired
private DelayProducer delayProducer;

@Test
@SneakyThrows
public void sendDelayedMsg() {
   for(int i = 16; i >= 10; i --) {
      String msg = "我将在" + i + "s后过期，开始时间为：" + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
      delayProducer.sendDelayedMsg(msg,i * 1000);
   }
   // 使进程阻塞，方便Consumer监听输出Message
   System.in.read();
}