阿里云RocketMQ定时/延迟消息队列实现

一、业务需求

需要实现一个提前二十分钟通知用户去做某件事的一个业务,拿到这个业务首先想到的最简单得方法就是使用Redis监控Key值:在排计划时候计算当前时间与提前二十分钟这个时间差,然后使用一个唯一的业务Key压入Redis中并设定好过期时间,然后只需要让Redis监控这个Key值即可,当这个Key过期后就可以直接拿到这个Key的值然后实现发消息等业务。

关于Redis实现该业务的具体实现在之前我已经记过一篇笔记,有兴趣的可以直接去瞅瞅,但是现在感觉有好多不足之处。

Redis实现定时: http://www.zhouhong.icu/post/144

二、Redis实现定时推送等功能的不足之处

由于Redis不止你一个使用,其他业务也会使用Redis,那么最容易想到的一个缺点就是:1、如果在提醒的那一刻有大量的其他业务的Key也过期了,那么就会很长时间都轮不到你的这个Key,就会出现消息推送延迟等缺点;2、还有一个缺点就是像阿里云他们的Redis根本就不支持对 Redis 的 Key值得监控(我也是因为公司使用阿里云的Redis没法对Key监控才从之前使用Redis监控转移到使用RocketMQ的延时消息推送的。。。)

三、阿里云RocketMQ定时/延迟消息队列实现

其实在实现上非常简单

1、首先去阿里云控制台创建所需消息队列资源,包括消息队列 RocketMQ 的实例、Topic、Group ID (GID),以及鉴权需要的 AccessKey(AK),一般公司都有现成的可以直接使用。
2、在springboot项目pom.xml添加需要的依赖。
<!--阿里云MQ TCP-->
<dependency>
    <groupId>com.aliyun.openservices</groupId>
    <artifactId>ons-client</artifactId>
    <version>1.8.7.1.Final</version>
</dependency>
3、在对应环境的application.properties文件配置参数
console:
  rocketmq:
    tcp:
      accessKey: XXXXXXXX使用自己的
      secretKey: XXXXXXXXXXXXX使用自己的
      nameSrvAddr: XXXXXXXXXXXXXXXX使用自己的
      topic: XXXXXXX使用自己的
      groupId: XXXXXXX使用自己的
      tag: XXXXXXXXX使用自己的
4、封装MQ配置类
import com.aliyun.openservices.ons.api.PropertyKeyConst;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import java.util.Properties;
/**
* @Description: MQ配置类
* @Author: zhouhong
* @Date: 2021/8/4
*/
@Configuration
@EnableConfigurationProperties({PatrolMqConfig.class})
@ConfigurationProperties(prefix = "console.rocketmq.tcp")
@Primary
public class PatrolMqConfig {

    private String accessKey;
    private String secretKey;
    private String nameSrvAddr;
    private String topic;
    private String groupId;
    private String tag;
    private String orderTopic;
    private String orderGroupId;
    private String orderTag;

    public Properties getMqPropertie() {
        Properties properties = new Properties();
        properties.setProperty(PropertyKeyConst.AccessKey, this.accessKey);
        properties.setProperty(PropertyKeyConst.SecretKey, this.secretKey);
        properties.setProperty(PropertyKeyConst.NAMESRV_ADDR, this.nameSrvAddr);
        return properties;
    }
    public String getAccessKey() {
        return accessKey;
    }
    public void setAccessKey(String accessKey) {
        this.accessKey = accessKey;
    }
    public String getSecretKey() {
        return secretKey;
    }
    public void setSecretKey(String secretKey) {
        this.secretKey = secretKey;
    }
    public String getNameSrvAddr() {
        return nameSrvAddr;
    }
    public void setNameSrvAddr(String nameSrvAddr) {
        this.nameSrvAddr = nameSrvAddr;
    }
    public String getTopic() {
        return topic;
    }
    public void setTopic(String topic) {
        this.topic = topic;
    }
    public String getGroupId() {
        return groupId;
    }
    public void setGroupId(String groupId) {
        this.groupId = groupId;
    }
    public String getTag() {
        return tag;
    }
    public void setTag(String tag) {
        this.tag = tag;
    }
    public String getOrderTopic() {
        return orderTopic;
    }
    public void setOrderTopic(String orderTopic) {
        this.orderTopic = orderTopic;
    }
    public String getOrderGroupId() {
        return orderGroupId;
    }
    public void setOrderGroupId(String orderGroupId) {
        this.orderGroupId = orderGroupId;
    }
    public String getOrderTag() {
        return orderTag;
    }
    public void setOrderTag(String orderTag) {
        this.orderTag = orderTag;
    }
}
5、配置生产者
import com.aliyun.openservices.ons.api.bean.ProducerBean;
import com.honyar.iot.ibs.smartpatrol.modular.mq.tcp.config.PatrolMqConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class PatrolProducerClient {

    @Autowired
    private PatrolMqConfig mqConfig;
    @Bean(name = "ConsoleProducer", initMethod = "start", destroyMethod = "shutdown")
    public ProducerBean buildProducer() {
        ProducerBean producer = new ProducerBean();
        producer.setProperties(mqConfig.getMqPropertie());
        return producer;
    }
}
6、消费者订阅
import com.aliyun.openservices.ons.api.MessageListener;
import com.aliyun.openservices.ons.api.PropertyKeyConst;
import com.aliyun.openservices.ons.api.bean.ConsumerBean;
import com.aliyun.openservices.ons.api.bean.Subscription;
import com.honyar.iot.ibs.smartpatrol.modular.mq.tcp.config.PatrolMqConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

//项目中加上 @Configuration 注解,这样服务启动时consumer也启动了
@Configuration
@Slf4j
public class PatrolConsumerClient {

    @Autowired
    private PatrolMqConfig mqConfig;

    @Autowired
    private MqTimeMessageListener messageListener;

    @Bean(initMethod = "start", destroyMethod = "shutdown")
    public ConsumerBean buildConsumer() {
        ConsumerBean consumerBean = new ConsumerBean();
        //配置文件
        Properties properties = mqConfig.getMqPropertie();
        properties.setProperty(PropertyKeyConst.GROUP_ID, mqConfig.getGroupId());
        //将消费者线程数固定为20个 20为默认值
        properties.setProperty(PropertyKeyConst.ConsumeThreadNums, "20");
        consumerBean.setProperties(properties);
        //订阅关系
        Map<Subscription, MessageListener> subscriptionTable = new HashMap<Subscription, MessageListener>();
        Subscription subscription = new Subscription();
        subscription.setTopic(mqConfig.getTopic());
        subscription.set);
        subscriptionTable.put(subscription, messageListener);
        //订阅多个topic如上面设置
        consumerBean.setSubscriptionTable(subscriptionTable);
        System.err.println("订阅成功!");
        return consumerBean;
    }
}
7、定时延时MQ消息监听消费
/**
 * @Description: 定时/延时MQ消息监听消费
 * @Author: zhouhong
 * @Create: 2021-08-03 09:16
 **/
@Component
public class MqTimeMessageListener implements MessageListener {
    private Logger logger = LoggerFactory.getLogger(this.getClass());
    @Override
    public Action consume(Message message, ConsumeContext context) {
        System.err.println("收到消息啦!!");
        logger.info("接收到MQ消息 -- Topic:{}, tag:{},msgId:{} , Key:{}, body:{}",
                message.getTopic(),message.getTag(),message.getMsgID(),message.getKey(),new String(message.getBody()));
        try {
            String msgTag = message.getTag(); // 消息类型
            String msgKey = message.getKey(); // 业务唯一id
            switch (msgTag) {
                case "XXXX":
                    // TODO 具体业务实现,比如发消息等操作
                    System.err.println("推送成功!!!!");
                    break;
            }
            return Action.CommitMessage;
        } catch (Exception e) {
            logger.error("消费MQ消息失败! msgId:" + message.getMsgID()+"----ExceptionMsg:"+e.getMessage());
            //消费失败,告知服务器稍后再投递这条消息,继续消费其他消息
            return Action.ReconsumeLater;
        }
    }
}
8、封装一个发延时/定时消息的工具类
/**
 * @Description: MQ发送消息助手
 * @Author: zhouhong
 * @Create: 2021-08-03 09:06
 **/
@Component
public class ProducerUtil {
    private Logger logger = LoggerFactory.getLogger(ProducerUtil.class);
    @Autowired
    private PatrolMqConfig config;
    @Resource(name = "ConsoleProducer")
    ProducerBean producerBean;
    public SendResult sendTimeMsg(String msgTag,byte[] messageBody,String msgKey,long delayTime) {
        Message msg = new Message(config.getTopic(),msgTag,msgKey,messageBody);
        msg.setStartDeliverTime(delayTime);
        return this.send(msg,Boolean.FALSE);
    }
    /**
     * 普通消息发送发放
     * @param msg 消息
     * @param isOneWay 是否单向发送
     */
    private SendResult send(Message msg,Boolean isOneWay) {
        try {
            if(isOneWay) {
                //由于在 oneway 方式发送消息时没有请求应答处理,一旦出现消息发送失败,则会因为没有重试而导致数据丢失。
                //若数据不可丢,建议选用同步或异步发送方式。
                producerBean.sendOneway(msg);
                success(msg, "单向消息MsgId不返回");
                return null;
            }else {
                //可靠同步发送
                SendResult sendResult = producerBean.send(msg);
                //获取发送结果,不抛异常即发送成功
                if (sendResult != null) {
                    success(msg, sendResult.getMessageId());
                    return sendResult;
                }else {
                    error(msg,null);
                    return null;
                }
            }
        } catch (Exception e) {
            error(msg,e);
            return null;
        }
    }
    private ExecutorService threads = Executors.newFixedThreadPool(3);
    private void error(Message msg,Exception e) {
        logger.error("发送MQ消息失败-- Topic:{}, Key:{}, tag:{}, body:{}"
                ,msg.getTopic(),msg.getKey(),msg.getTag(),new String(msg.getBody()));
        logger.error("errorMsg --- {}",e.getMessage());
    }
    private void success(Message msg,String messageId) {
        logger.info("发送MQ消息成功 -- Topic:{} ,msgId:{} , Key:{}, tag:{}, body:{}"
                ,msg.getTopic(),messageId,msg.getKey(),msg.getTag(),new String(msg.getBody()));
    }
}
9、接口测试(10000表示延迟10秒,可以根据自己的业务计算出)
// 测试MQ延时
    @Autowired
    ProducerUtil producerUtil;
    @PostMapping("/patrolTaskTemp/mqtest")
    public void mqTime(){
        producerUtil.sendTimeMsg(
                "SMARTPATROL",
                "你好鸭!!!".getBytes(),
                "红红火火恍恍惚惚!!",
                System.currentTimeMillis() + 10000
        );
    }
10、结果
2021-08-04 22:07:12.677  INFO 17548 --- [nio-8498-exec-2] c.h.i.i.s.m.common.util.ProducerUtil     : 发送MQ消息成功 -- Topic:TID_COMMON ,msgId:C0A80168448C2F0E140B14322CB30000 , Key:红红火火恍恍惚惚!!, tag:SMARTPATROL, body:你好鸭!!!
收到消息啦!!
推送成功!!!!
2021-08-04 22:07:22.179  INFO 17548 --- [MessageThread_1] c.h.i.i.s.m.m.t.n.MqTimeMessageListener  : 接收到MQ消息 -- Topic:TID_COMMON, tag:SMARTPATROL,msgId:0b17f2e71ebd1b054c2c156f6d1d1655 , Key:红红火火恍恍惚惚!!, body:你好鸭!!!

 


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