RubbitMQ（死信隊列）極簡測試

基本環境：
jdk版本：1.8
rubbitmq版本：3.7.16
springboot項目

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wudy.rabbitmq</groupId>
    <artifactId>ttl-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ttl-demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

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

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

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

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.yml

server:
  port: 8081
spring:
  rabbitmq:
    host: 127.0.0.1
    port: 5672
    username: guest
    password: guest
    virtual-host: /

RabbitMQConfig

package com.yuxiaoyu.rabbitmq.ttl.demo;

import org.springframework.amqp.core.*;
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;

@Configuration
public class RabbitMQConfig {

    public static final String DELAY_EXCHANGE_NAME = "delay.exchange.name";
    public static final String DELAY_QUEUEA_NAME = "delay.queue.name";
    public static final String DELAY_QUEUEA_ROUTING_KEY = "delay.queue.routingkey";
    public static final String DEAD_LETTER_EXCHANGE = "dead.letter.exchange";
    public static final String DEAD_LETTER_QUEUEA_ROUTING_KEY = "dead.letter.queue.routingkey";
    public static final String DEAD_LETTER_QUEUEA_NAME = "dead.letter.queue.name";

    //=================================延時===============================
    // 聲明延時Exchange
    @Bean("delayExchange")
    public DirectExchange delayExchange(){
        return new DirectExchange(DELAY_EXCHANGE_NAME);
    }

    // 聲明延時隊列A 延時10s 並綁定到對應的死信交換機
    @Bean("delayQueueA")
    public Queue delayQueueA(){
        Map<String, Object> args = new HashMap<>(3);
        // x-dead-letter-exchange    這裏聲明當前隊列綁定的死信交換機
        args.put("x-dead-letter-exchange", DEAD_LETTER_EXCHANGE);
        // x-dead-letter-routing-key  這裏聲明當前隊列的死信路由key
        args.put("x-dead-letter-routing-key", DEAD_LETTER_QUEUEA_ROUTING_KEY);
        // x-message-ttl  聲明隊列的TTL
        args.put("x-message-ttl", 10000);
        return QueueBuilder.durable(DELAY_QUEUEA_NAME).withArguments(args).build();
    }

    // 聲明延時隊列A綁定關係
    @Bean
    public Binding delayBindingA(@Qualifier("delayQueueA") Queue queue,
                                 @Qualifier("delayExchange") DirectExchange exchange){
        return BindingBuilder.bind(queue).to(exchange).with(DELAY_QUEUEA_ROUTING_KEY);
    }

    //================================死信==============================
    // 聲明死信Exchange
    @Bean("deadLetterExchange")
    public DirectExchange deadLetterExchange(){
        return new DirectExchange(DEAD_LETTER_EXCHANGE);
    }

    // 聲明死信隊列A 用於接收延時10s處理的消息
    @Bean("deadLetterQueueA")
    public Queue deadLetterQueueA(){
        return new Queue(DEAD_LETTER_QUEUEA_NAME);
    }

    // 聲明死信隊列A綁定關係
    @Bean
    public Binding deadLetterBindingA(@Qualifier("deadLetterQueueA") Queue queue,
                                      @Qualifier("deadLetterExchange") DirectExchange exchange){
        return BindingBuilder.bind(queue).to(exchange).with(DEAD_LETTER_QUEUEA_ROUTING_KEY);
    }
}

RabbitMQSenderController

package com.yuxiaoyu.rabbitmq.ttl.demo;

import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Date;

@Slf4j
@RequestMapping("rabbitmq")
@RestController
public class RabbitMQSenderController {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @RequestMapping("tlltest")
    public void sendMsg(String msg){
        log.info("當前時間：{},收到請求，msg:{},delayType:{}", new Date(), msg);
        rabbitTemplate.convertAndSend(RabbitMQConfig.DELAY_EXCHANGE_NAME, RabbitMQConfig.DELAY_QUEUEA_ROUTING_KEY, msg);
    }

}

DeadLetterQueueConsumer

package com.yuxiaoyu.rabbitmq.ttl.demo;

import com.rabbitmq.client.Channel;
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.io.IOException;
import java.util.Date;

@Slf4j
@Component
public class DeadLetterQueueConsumer {

    @RabbitListener(queues = RabbitMQConfig.DEAD_LETTER_QUEUEA_NAME)
    public void receiveA(Message message, Channel channel) throws IOException {
        String msg = new String(message.getBody());
        log.info("當前時間：{},死信隊列A收到消息：{}", new Date().toString(), msg);
        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
    }

}

（注:如果啓動報超時異常或者拒絕連接，可以不用理會，待測試完成後在來找問題）