springboot项目整合rabbitMq涉及消息的发送确认,消息的消费确认机制

1.引入maven依赖
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
2.在application.yml的配置:

spring:
  rabbitmq:
    host: 106.52.82.241
    port: 5672
    username: yang
    password: Yangxiaohui227
    virtual-host: /
    publisher-confirms: true #消息发送后,如果发送成功到队列,则会回调成功信息
    publisher-returns: true  #消息发送后,如果发送失败,则会返回失败信息信息
    listener:  #加了2下面2个属性,消费消息的时候,就必须发送ack确认,不然消息永远还在队列中
      direct:
        acknowledge-mode: manual
      simple:
        acknowledge-mode: manual

//为了统一管理所有的Mq消息,建一个类存储常量,消息的设计都基本会涉及(队列(queue),交换机(exchange),路由键(route)三个值)
public class RabbitMqConstant {

    //下单发送消息 队列名,交换机名,路由键的配置
    public final static String SHOP_ORDER_CREATE_EXCHANGE="shop.order.create.exchange";
    public final static String SHOP_ORDER_CREATE_ROUTE="shop.order.create.route";
    public final static String SHOP_ORDER_CREATE_QUEUE="shop.order.create.queue";
}

package com.example.demo.mq;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.amqp.SimpleRabbitListenerContainerFactoryConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
//该类是mq最重要的一个类,所有队列的创建,交换机的创建,队列和交换机的绑定都在这里实现
@Configuration
public class RabbitMqConfig {
    private final static Logger log = LoggerFactory.getLogger(RabbitMqConfig.class);
    @Autowired
    private CachingConnectionFactory connectionFactory;

    @Autowired
    private SimpleRabbitListenerContainerFactoryConfigurer factoryConfigurer;

    /**
     * 单一消费者
     *
     * @return
     */

    @Bean(name = "singleListenerContainer")
    public SimpleRabbitListenerContainerFactory listenerContainer() {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        factory.setMessageConverter(new Jackson2JsonMessageConverter());
        factory.setConcurrentConsumers(1);
        factory.setMaxConcurrentConsumers(1);
        factory.setPrefetchCount(1);
        factory.setTxSize(1);
        return factory;
    }

    /**
     * 多个消费者
     *
     * @return
     */
    @Bean(name = "multiListenerContainer")
    public SimpleRabbitListenerContainerFactory multiListenerContainer() {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factoryConfigurer.configure(factory, connectionFactory);
        factory.setMessageConverter(new Jackson2JsonMessageConverter());
        factory.setConcurrentConsumers(20);
        factory.setMaxConcurrentConsumers(20);
        factory.setPrefetchCount(20);
        return factory;
    }

    /**
     * 模板的初始化配置
     *
     * @return
     */
    @Bean
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        rabbitTemplate.setMandatory(true);
        rabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            @Override
            public void confirm(CorrelationData correlationData, boolean sucess, String cause) {
                if (sucess) {
                    log.info("消息发送成功:correlationData({}),ack({}),cause({})", correlationData, sucess, cause);
                }

            }
        });
        rabbitTemplate.setReturnCallback(new RabbitTemplate.ReturnCallback() {
            @Override
            public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {
                log.warn("消息丢失:exchange({}),route({}),replyCode({}),replyText({}),message:{}", exchange, routingKey, replyCode, replyText, message);
            }
        });
        return rabbitTemplate;
    }



    //消息的创建设计三个步骤:队列的创建,交换机创建(direct类型,topic类型,fanout类型),队列和交换机的通过路由键的绑定


    //--------- 下单消息配置
    //队列
    @Bean
    public Queue shopOrderCreateQueue() {
        return new Queue(RabbitMqConstant.SHOP_ORDER_CREATE_QUEUE, true);
    }

    //Direct交换机(一对一关系,一个direct交换机只能绑定一个队列,当有2个相同消费者时,如项目部署2台机,只有一个消费者能消费,)
    @Bean
    DirectExchange shopOrderCreateExchange() {
        return new DirectExchange(RabbitMqConstant.SHOP_ORDER_CREATE_EXCHANGE);
    }

    //绑定
    @Bean
    Binding bindShopOrderCreateQueue() {
        return BindingBuilder.bind(shopOrderCreateQueue()).to(shopOrderCreateExchange()).with(RabbitMqConstant.SHOP_ORDER_CREATE_ROUTE);
    }
}

import com.alibaba.fastjson.JSON;
import com.example.demo.domain.ShopOrderMast;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
//专门用一个类作为消息的生产者
@Service
public class ShopMessagePublisher {
    @Autowired
    private RabbitTemplate rabbitTemplate;

    public void sendCreateOrderMessage(ShopOrderMast orderMast){
        CorrelationData correlationData=new CorrelationData(); //该参数可以传,可以不传,不传时,correlationData的id值默认是null,消息发送成功后,在RabbitMqConfig类的rabbitTemplate类的confirm方法会接收到该值
        correlationData.setId(orderMast.getCodOrderId()); 
        String msg = JSON.toJSONString(orderMast);
        //convertAndSend该方法有非常多的重构方法,找到适合自己的业务方法就行了,这里我用的是其中一个,发送时指定exchange和route值,这样就会发到对应的队列去了
        rabbitTemplate.convertAndSend(RabbitMqConstant.SHOP_ORDER_CREATE_EXCHANGE,RabbitMqConstant.SHOP_ORDER_CREATE_ROUTE,msg,correlationData);

    }
}

//所有的消费都写在一个消费类中
@Service
public class ShopMessageComsumer {
    //监听下单消息
    @RabbitListener(queues =RabbitMqConstant.SHOP_ORDER_CREATE_QUEUE)
    public void createOrderMesaageComsumer(String msg, Channel channel, Message message) {
        try {
                //消息可以通过msg获取也可以通过message的body属性获取
                System.out.println("开始消费了");
                ShopOrderMast shopOrderMast = JSON.parseObject(msg, ShopOrderMast.class);


            /**
             * 因为我在application.yml那里配置了消息手工确认也就是传说中的ack,所以消息消费后必须发送确认给mq
             * 很多人不理解ack(消息消费确认),以为这个确认是告诉消息发送者的,这个是错的,这个ack是告诉mq服务器,
             * 消息已经被我消费了,你可以删除它了
             * 如果没有发送basicAck的后果是:每次重启服务,你都会接收到该消息
             * 如果你不想用确认机制,就去掉application.yml的acknowledge-mode: manual配置,该配置默认
             * 是自动确认auto,去掉后,下面的channel.basicAck就不用写了
             *
             */
            channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);

            } catch (Exception e) {
            try {
                //出现异常,告诉mq抛弃该消息
                channel.basicNack(message.getMessageProperties().getDeliveryTag(),false,false);
                e.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            }

        }

    }
}
//这里我发送了一条消息,orderId我设置为555556666666,在消息发送时,存到了CorrelationData对象中,因此,发送成功后,在confirm方法可以接收到该值了
//消息发送成功后,在控制台会看到有成功的回调信息,也就是回调了rabbitTemplate的:

confirm(CorrelationData correlationData, boolean sucess, String cause)

 //上面测试的下单消息是direct类型消息的,现在创建一个topic消息

//RabbitMqConstant新增topic的配置信息
//下单topic消息:路由键的名字 星号* 代表多个字符,#号代表一个字符
    //topic交换机,发送消息时,发送到指定shop.order.create.topic.exchange和shop.order.create.topic.route中
    public final static String SHOP_ORDER_CREATE_TOPIC_EXCHANGE="shop.order.create.topic.exchange";
    public final static String SHOP_ORDER_CREATE_TOPIC_TOUTE="shop.order.create.topic.route";


    //队列1,通过shop.order.create.topic.*与交换机绑定
    public final static String SHOP_ORDER_CREATE_TOPIC_ROUTE_ONE="shop.order.create.topic.*";
    public final static String SHOP_ORDER_CREATE_TOPIC_QUEUE_ONE="shop.order.create.topic.queue.one";


    //队列2 通过shop.order.create.topic.*与交换机绑定shop.order.create.topic.#
    public final static String SHOP_ORDER_CREATE_TOPIC_ROUTE_TWO="shop.order.create.topic.#";
    public final static String SHOP_ORDER_CREATE_TOPIC_QUEUE_TWO="shop.order.create.topic.queue.two";

//在RabbitMqConfig新增topic队列的基本信息
 //--------- 下单消息配置
    //队列
    @Bean
    public Queue shopOrderCreateQueue() {
        return new Queue(RabbitMqConstant.SHOP_ORDER_CREATE_QUEUE, true);
    }

    //Direct交换机(一对一关系,一个direct交换机只能绑定一个队列,当有2个相同消费者时,如项目部署2台机,只有一个消费者能消费,)
    @Bean
    DirectExchange shopOrderCreateExchange() {
        return new DirectExchange(RabbitMqConstant.SHOP_ORDER_CREATE_EXCHANGE);
    }

    //绑定
    @Bean
    Binding bindShopOrderCreateQueue() {
        return BindingBuilder.bind(shopOrderCreateQueue()).to(shopOrderCreateExchange()).with(RabbitMqConstant.SHOP_ORDER_CREATE_ROUTE);
    }


    //-------------------------下单TOPIC消息的创建

    //创建TOPIC交换机
    @Bean
    TopicExchange shopOrderCreateTopicExchange() {
        return new TopicExchange(RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_EXCHANGE);
    }
    //---------------------------//队列1使用自己的route和交换机绑定
    //创建队列1
    @Bean
    public Queue shopOrderCreateQueueOne() {
        return new Queue(RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_QUEUE_ONE, true);
    }
    //绑定
    @Bean
    Binding bindShopOrderCreateQueueOne() {
        return BindingBuilder.bind(shopOrderCreateQueueOne()).to(shopOrderCreateTopicExchange()).with(RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_ROUTE_ONE);
    }

    //---------------------------//队列2用自己的route和交换机绑定

    //创建队列2
    @Bean
    public Queue shopOrderCreateQueueTWO() {
        return new Queue(RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_QUEUE_TWO, true);
    }

    //绑定
    @Bean
    Binding bindShopOrderCreateQueueTWO() {
        return BindingBuilder.bind(shopOrderCreateQueueTWO()).to(shopOrderCreateTopicExchange()).with(RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_ROUTE_TWO);
    }

//消息的发送方新增
  //发送TOPIC消息
    public void sendCreateOrderTOPICMessage(ShopOrderMast orderMast){
        CorrelationData correlationData=new CorrelationData(); //该参数可以传,可以不传,不传时,correlationData的id值默认是null,消息发送成功后,在RabbitMqConfig类的rabbitTemplate类的confirm方法会接收到该值
        correlationData.setId(orderMast.getCodOrderId());
        String msg = JSON.toJSONString(orderMast);
        //消息发送使用公共route而不是某个队列自己的route
        rabbitTemplate.convertAndSend(RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_EXCHANGE,RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_TOUTE,msg,correlationData);

    }

//消息的消费方新增
//消费者1
    @RabbitListener(queues =RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_QUEUE_ONE)
    public void createOrderMesaageComsumerOne(String msg, Channel channel, Message message) {
        try {
                //消息可以通过msg获取也可以通过message对象的body值获取
                System.out.println("我是消费者1");
                ShopOrderMast shopOrderMast = JSON.parseObject(msg, ShopOrderMast.class);


            /**
             * 因为我在application.yml那里配置了消息手工确认也就是传说中的ack,所以消息消费后必须发送确认给mq
             * 很多人不理解ack(消息消费确认),以为这个确认是告诉消息发送者的,这个是错的,这个ack是告诉mq服务器,
             * 消息已经被我消费了,你可以删除它了
             * 如果没有发送basicAck的后果是:每次重启服务,你都会接收到该消息
             * 如果你不想用确认机制,就去掉application.yml的acknowledge-mode: manual配置,该配置默认
             * 是自动确认auto,去掉后,下面的channel.basicAck就不用写了
             *
             */
            channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);

            } catch (Exception e) {
            try {
                //出现异常,告诉mq抛弃该消息
                channel.basicNack(message.getMessageProperties().getDeliveryTag(),false,false);
                e.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            }

        }

    }
    //消费者2
    @RabbitListener(queues =RabbitMqConstant.SHOP_ORDER_CREATE_TOPIC_QUEUE_TWO)
    public void createOrderMesaageComsumerTWO(String msg, Channel channel, Message message) {
        try {
                //消息可以通过msg获取也可以通过message对象的body值获取
                System.out.println("我是消费者2");
                ShopOrderMast shopOrderMast = JSON.parseObject(msg, ShopOrderMast.class);


            /**
             * 因为我在application.yml那里配置了消息手工确认也就是传说中的ack,所以消息消费后必须发送确认给mq
             * 很多人不理解ack(消息消费确认),以为这个确认是告诉消息发送者的,这个是错的,这个ack是告诉mq服务器,
             * 消息已经被我消费了,你可以删除它了
             * 如果没有发送basicAck的后果是:每次重启服务,你都会接收到该消息
             * 如果你不想用确认机制,就去掉application.yml的acknowledge-mode: manual配置,该配置默认
             * 是自动确认auto,去掉后,下面的channel.basicAck就不用写了
             *
             */
            channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);

            } catch (Exception e) {
            try {
                //出现异常,告诉mq抛弃该消息
                channel.basicNack(message.getMessageProperties().getDeliveryTag(),false,false);
                e.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            }

        }

    }

 //测试结果:

 //如何在rabbitMq管理页面查看没有还没被消费的消息信息: