springBoot-rabbitMq手动确认消息

代码基础怎么写我就不说了，看我的另一篇博客

springBoot整合RabbitMQ（Demo）_我要用代码向我喜欢的女孩表白的博客-CSDN博客

假设你要手动ack，怎么做呢？

通常自动是，mq发给服务端，服务端收到了就当处理过了，但是我们要保证数据不丢失。所以得处理完了，才告诉mq说我做了。所以做完了在ack确认，遇到了异常就重发。比如a,b,c，三台机器发给了b,b收到没有处理完，就被关机了。那这条消息就没有发完。

依赖

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

application.properties的配置

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spring.rabbitmq.host=xxxx
spring.rabbitmq.port=5672
spring.rabbitmq.username=xxxxx
spring.rabbitmq.password=xxxxx
spring.rabbitmq.listener.simple.cknowledge-mode=manual
spring.rabbitmq.listener.simple.prefetch=1
spring.rabbitmq.publisher-returns=true

下面黄色这一段就是ack手动确认。

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MqReceiveDevListener消费者

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package com.dengta.tanzhiwcustomermarket.config;


import com.dengta.tanzhiwcustomermarket.tools.Constants;
import com.rabbitmq.client.Channel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.io.IOException;

@Component
public class MqReceiveDevListener {



//@Value("${dev-gen-audio-url}")
//String genAudioUrl;
//
//@Value("${dev-audio-token}")
//String audioToken;


    private static final Logger logger = LoggerFactory.getLogger(MqReceiveDevListener.class);


    //---------------------------下面为dev环境下对应的消息队列-----------------------------------------



//todo 1.多个消费者并行消费
    @RabbitListener(queues = Constants.DT_MARKET_MQ_TASK,concurrency = "3")
    /**
     * 这个content是一个json，由barrageController发来的
     */
    public void receiveDouYinBarrageDev(String content, Channel channel, @Header(AmqpHeaders.DELIVERY_TAG) long tag) {

        try {
            Thread.sleep(1000*10);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                channel.basicAck(tag, false);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

}