springboot整合rabbitmq利用延遲外掛傳送延時訊息

阿新 • • 發佈：2021-01-31

技術標籤：訊息佇列高階特性篇佇列 rabbitmq spring boot 交換機

1.需求

利用rabbitmq的死信交換機構建延時佇列，在容器啟動的時候往死信交換機發送一條訊息，一分鐘後監聽者接收到訊息並消費。

2.依賴

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-amqp</artifactId>
		</dependency>

3.配置檔案

spring.rabbitmq.host=121.199.31.160
spring.rabbitmq.port=5672
spring.rabbitmq.username=root
spring.rabbitmq.password=root
spring.rabbitmq.publisher-confirms=true
spring.rabbitmq.publisher-returns=true
#預設情況下訊息消費者是自動確認訊息的，如果要手動確認訊息則需要修改確認模式為manual
spring.rabbitmq.listener.simple.cknowledge-mode=manual
# 消費者每次從佇列獲取的訊息數量。此屬性當不設定時為：輪詢分發，設定為1為：公平分發
spring.rabbitmq.listener.simple.prefetch=1

4.編寫配置類

/**
 * @author yhd
 * @createtime 2021/1/22 14:37
 */
@SpringBootApplication
public class DelayConfig {

	//延時交換機
    public static final String EXCHANGE_DIRECT_ORDER_CANCEL = "spring.boot.test.delay.exchange";
    //路由鍵
    public static final String ROUTING_ORDER_CANCEL = "spring.boot.test.delay.routing" 
;
    //延遲佇列
    public static final String QUEUE_ORDER_CANCEL  = "spring.boot.test.delay.queue";
    // 延遲時間 單位：秒
    public static final int DELAY_TIME  = 60;

    @Bean //宣告死信佇列
    public Queue delayQueue() {
        // 第一個引數是建立的queue的名字，第二個引數是是否支援持久化
        return new Queue(QUEUE_ORDER_CANCEL, 
 true);
    }

    @Bean //宣告私信交換機
    public CustomExchange delayExchange() {
        Map<String, Object> args = new HashMap<String, Object>();
        args.put("x-delayed-type", "direct");
        return new CustomExchange(EXCHANGE_DIRECT_ORDER_CANCEL, "x-delayed-message", true, false, args);
    }

    @Bean //死信交換機繫結死信佇列並設定路由鍵
    public Binding bindingDelay() {
        return BindingBuilder.bind(delayQueue()).to(delayExchange()).with(ROUTING_ORDER_CANCEL).noargs();
    }
}

5.編寫訊息傳送方和接收方

/**
 * @author yhd
 * @createtime 2021/1/22 14:34
 * 測試springboot整合mq利用死信佇列傳送訊息並接收
 */
@Component
@Slf4j
public class SpringBootDelayQueueTest {

    @Resource
    private RabbitTemplate rabbitTemplate;

    @Resource
    private AmqpTemplate amqpTemplate;

    /**
     * 傳送訊息
     */
    public void sendMessage() {
        amqpTemplate.convertAndSend(
                DelayConfig.EXCHANGE_DIRECT_ORDER_CANCEL,DelayConfig.ROUTING_ORDER_CANCEL,
                "try send message to delay queue !",
                msg -> {
                    msg.getMessageProperties().setDelay(DelayConfig.DELAY_TIME * 1000);
                    return msg;
                });

    }

    /**
     * 接收訊息
     */
    @RabbitListener(queues = DelayConfig.QUEUE_ORDER_CANCEL)
    public void receiveMessage(String msg, Message message, Channel channel) throws Exception {
        log.info("the delaty queue received message : {}", msg);
        //log.info("the delaty queue received message : {}", new String(message.getBody()));
        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
    }
}

6.容器啟動傳送訊息

/**
 * @author yhd
 * @createtime 2021/1/22 14:56
 */
@Component
@Slf4j
public class BootMq implements ApplicationRunner {

    @Resource
    private SpringBootDelayQueueTest springBootDelayQueueTest;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        log.info("傳送私信");
        springBootDelayQueueTest.sendMessage();
    }
}