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RabbitMq 入门实例详解+实例代码

2022-07-03 12:01:37 作者：互联网

RabbitMq 入门实例详解+实例代码最近有项目又有使用RabbitMQ，使用过程中看到有使用 “AmqpAdmin” 后进行详细研究为什么会用创建 Queue、Exchange 还用AmqpAdmin.delcareQueue,经过深入的查资料和思考发现其实没必要在@Configuration 类中 Return new Queue()中使用; 经过这次遇到的问题也正好对RabbitMq整体梳理，下面是干货满满的说明和实例代码。 RabbitMQ 按装请自已查找，这里不在赘述。 1、实例中有生产者：

confirmpusher：发送方

confirmreceive：接收方

实例confirmpusher 详细搭建
1）Pom 文件节点：

<?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 https://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>2.6.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.liyanbomq</groupId>
    <artifactId>confirmpusher</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>confirmpusher</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.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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

2）yml文件

spring:
  rabbitmq:
    host: 192.168.88.129
    username: liyanbo
    password: liyanbo
    #开启发送确认机制，将来消息到达交换机以后有一个回调
    publisher-confirm-type: correlated
    #消息到达消息队列回调（如果消息没有成功到达队列，会触发回调方法）
    publisher-returns: true
    template:
      retry:
        enabled: true  # 开启重发机制
        initial-interval: 1000ms #间隔 1秒
        max-attempts: 6    #最多发6次
        multiplier: 1.2 #每次间隔 时间*1.2
        max-interval: 10000ms  #每次最大间隔时间
    port: 5672
    listener:
      simple:
        acknowledge-mode: manual


server:
  port: 7004

3）读取RabbitMQ相关配置后声明队列、交换机，进行交换机、队列绑定

@Configuration

RabbitConfigurationSure

package com.liyanbomq.confirmpusher.configuration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.annotation.PostConstruct;


/**
 * 用于mq消息确认
 *
 * 总结
 *   一、确认消息发送成功到交换机和消息队列
 *     1、调用回调方法
 *       利用 yml文件中参数进行设置发送失败消息进行重新发送
 *          template:
 *              retry:
 *                  enabled: true  # 开启重发机制
 *                  initial-interval: 1000ms #间隔 1秒
 *                  max-attempts: 6    #最多发6次
 *                  multiplier: 1.2 #每次间隔 时间*1.2
 *                  max-interval: 10000ms  #每次最大间隔时间
 *
 *
 *      二、 确认消息发送成功到交换机和消息队列 调用回调方法
 *         1、在回调方法中 记录发送失败的数据记录 （如用mysql存储）
 *         2、制作定时任务处理未成功发送的消息
 *
 */
@Configuration
public class RabbitConfigurationSure implements RabbitTemplate.ConfirmCallback,RabbitTemplate.ReturnsCallback {
    public  static final  String CONFIRM_QUEUE_NAME="confirm_queue";
    public  static final String EXCHANGE_NAME="confirm_exchange";


   public final Logger logger= LoggerFactory.getLogger(RabbitConfigurationSure.class);

   @Autowired
   RabbitTemplate rabbitTemplate;

    /**
     * 这样设置 setReturnsCallback、setConfirmCallback才会起作用
     */
   @PostConstruct
   public  void  initRabbitMq(){
       rabbitTemplate.setReturnsCallback(this);
       rabbitTemplate.setConfirmCallback(this);
   }

    /**
     * 创建队列
     * @return
     */
    @Bean
    public Queue getConfirmQueue(){
        /**
         * parameter 1 队列名称
         * durable:持久化
         * exclusive: 排他其它连接也可操作
         * autodelete:没有消费连接时不会自动删除
         */
        return new Queue(CONFIRM_QUEUE_NAME,true,false,false);
    }

    /**
     * 交换机
     * @return
     */
    @Bean
    public DirectExchange getConirmExchange(){
        return  new DirectExchange(EXCHANGE_NAME,true,false);
    }


    /**
     * 绑定消息队列到交换机上
     * @return
     */
    @Bean
    public Binding  getConfirmBinding(){
        return BindingBuilder.bind(getConfirmQueue()).to(getConirmExchange()).with(CONFIRM_QUEUE_NAME);
    }


    /**
     * 消息成功到达交换机会触发回调该方法
     * @param correlationData
     * @param ack 是否成功到达交换机
     * @param cause 如果未成功到达，原因
     */
    @Override
    public void confirm(CorrelationData correlationData, boolean ack, String cause) {

        if(ack){
            System.out.println("成功到达交换机");
            logger.info("{}成功到达交换机",correlationData.getId());
        }else{
            System.out.println("未成功到达交换机，原因："+cause);
            logger.info("{}未成功到达交换机，原因：{}",correlationData.getId(),cause);
        }

    }

    /**
     * 消息未成功到达该队列会触发回调该方法
     * @param returnedMessage
     */
    @Override
    public void returnedMessage(ReturnedMessage returnedMessage) {
        System.out.println("消息成功到达队列");
        logger.info("{}消息成功到达队列",returnedMessage.getMessage().getMessageProperties().getMessageId());

    }


}

　　4）发起调用往消息队列写信息

package com.liyanbomq.confirmpusher.controller;

import com.liyanbomq.confirmpusher.configuration.RabbitConfigurationSure;
import org.springframework.amqp.rabbit.connection.CorrelationData;
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.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;

@RestController
public class pushmqController {
    @Autowired
    RabbitTemplate rabbitTemplate;

    @RequestMapping("send")
    public String sendmqInfo(@RequestParam("msg") String msg){

//        try {
            rabbitTemplate.convertAndSend(RabbitConfigurationSure.EXCHANGE_NAME,RabbitConfigurationSure.CONFIRM_QUEUE_NAME,msg,new CorrelationData(UUID.randomUUID().toString()));
//        } catch (Exception e) {
//            e.printStackTrace();
//        }

        return "it is msg:"+msg;
    }


    @RequestMapping("sendfanout")
    public String sendmqInfofanout(@RequestParam("msg") String msg){

//        try {
        rabbitTemplate.convertAndSend(RabbitConfigurationSure.EXCHANGE_NAME+"fanout",RabbitConfigurationSure.CONFIRM_QUEUE_NAME+"fanout",msg,new CorrelationData(UUID.randomUUID().toString()));
//        } catch (Exception e) {
//            e.printStackTrace();
//        }

        return "it is msg:"+msg;
    }
}

　　4）Springboot 启动项，运行

package com.liyanbomq.confirmpusher;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ConfirmpusherApplication {

	public static void main(String[] args) {
		SpringApplication.run(ConfirmpusherApplication.class, args);
	}

}

5）通过Controller发起调用

http://localhost:7004/send?msg=1234

2、接收都代码搭建 1）pom文件、2）yml文件、3）配置信息读取与发送者搭建一样

1、

2、

3、

4、接收者代码

package com.liyanbomq.confirmreceive.receive;

import com.liyanbomq.confirmreceive.configuration.RabbitConfigurationSure;
import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import java.io.IOException;

@Component
public class ReceiverService {

    @RabbitListener(queues = RabbitConfigurationSure.CONFIRM_QUEUE_NAME)
    public void  receiveMsg(Message message, Channel channel){
        // 消息标识
        long deliveryTag= message.getMessageProperties().getDeliveryTag();
        try {
            byte [] bytes=message.getBody();
            String mess=new String(bytes);
            System.out.println("mess = " + mess);
//            int l=2/2/0;
            //  手动确认签收 第一个参数是消息标记 第二个参数fasle 只确认当前消息，true表示之前所有的消息都确认成功
            channel.basicAck(deliveryTag,false);


        } catch (Exception e) {
            try {
                // 标示签收失败，再次放入队列中  第三个参烽 requeue 再次放入队列
                channel.basicNack(deliveryTag,false,true);
            } catch (IOException ioException) {
                ioException.printStackTrace();
            }
            e.printStackTrace();
        }


    }
}

二、关于自定义配置RabbitMq 和AmqpAdmin.declare 说明

一、关于 rabbitMq配置是否需要显式写代码
/**
 *
 *组装配置 rabbitMq - connectionFactory
 * 1、如果默认配置节点设置 不用该组装connectionFactory
 * spring:
 *   rabbitmq:
 *     username: liyanbo
 *     password: liyanbo
 *     host: 192.168.88.129
 *     port: 5672
 *2、如果 自定义配置像下面 自定义pos:就需要 组装配置 connectionFactory
 * spring:
 *  *   rabbitmq:
 *        pos:
 *  *       username: liyanbo
 *  *       password: liyanbo
 *  *       host: 192.168.88.129
 *  *       port: 5672
 *
  * @return
 */
@Bean(name = "connectionFactory")
public CachingConnectionFactory connectionFactory(){
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
    connectionFactory.setHost("192.168.88.129");
    connectionFactory.setPort(5672);
    connectionFactory.setUsername("liyanbo");
    connectionFactory.setPassword("liyanbo");
    connectionFactory.setPublisherReturns(true);
    return connectionFactory;
}

    @Bean(name = "rabbitTemplate")
    public RabbitTemplate rabbitTemplate(@Qualifier("connectionFactory")  CachingConnectionFactory connectionFactory) {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        return rabbitTemplate;
    }

    @Bean(name = "amqpAdmin")
    public AmqpAdmin amqpAdmin(@Qualifier("connectionFactory")  CachingConnectionFactory connectionFactory){
    AmqpAdmin amqpAdmin=new RabbitAdmin(connectionFactory);
    return amqpAdmin;
    }

二、 AmqpAdmin amqpAdmin 是否需要
 1、使用了下面  @Configuration 就不需要使用
      @Configuration
      public class RabbitConfigurationSure {
 2、在下面过程中 会自动生成声明 Queue（源码本有逻辑）， 不需要使用amqpAdmin.declareQueue(queue); 只有使用测试或普通类不使用 @Configuration 才需要amqpAdmin.declareQueue(queue)
       @Bean
         public Queue supplyRabbitQueue() {
             return new Queue("SupplyQueue");
         }


 ps:AmqpAdmin用于创建/删除 Exchange、Queue、Binding 和初始化RabbitMQ

如有疑问或问题可以沟通讨论qq:626382542

标签：connectionFactory,return,springframework,实例,RabbitMq,import,org,public,详解
来源： https://www.cnblogs.com/liyanbofly/p/16439531.html