你的项目是时候集成RocketMQ了

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1. RocketMQ介绍

rocketmq是阿里巴巴开源的一款分布式的消息中间件，他源于jms规范但是不遵守jms规范。对于分布式只一点，如果你了用过其他mq并且了解过rocketmq，就知道rocketmq天生就是分布式的，可以说是broker、provider、consumer等各种分布式

2. RocketMQ优点

  • 去除对zk的依赖
  • 支持异步和同步两种方式刷磁盘
  • 单机支持的队列或者topic数量是5w
  • 支持消息重试
  • 支持严格按照一定的顺序发送消息
  • 支持定时发送消息
  • 支持根据消息ID来进行查询
  • 支持根据某个时间点进行消息的回溯
  • 支持对消息服务端的过滤
  • 消费并行度:顺序消费 取决于queue数量,乱序消费 取决于consumer数量

3. RocketMQ发送消息和消费消息

(1) 创建父工程

pom.xml如下

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java复制代码<?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>

    <groupId>com.james</groupId>
    <artifactId>rocketmq-demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>pom</packaging>
    <modules>
        <module>MQProducer-demo</module>
        <module>MQConsume-demo</module>
    </modules>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.james</groupId>
                <artifactId>common_utils</artifactId>
                <version>0.0.3-SNAPSHOT</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.apache.rocketmq/rocketmq-client -->
            <dependency>
                <groupId>org.apache.rocketmq</groupId>
                <artifactId>rocketmq-client</artifactId>
                <version>4.9.2</version>
            </dependency>

            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.22</version>
            </dependency>

        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!--该配置必须 -->
                    <fork>true</fork>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

        </plugins>

    </build>

</project>
(2) 创建消息生产者

新建工程MQProducer-demo

pom.xml如下所示

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xml复制代码<?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>
        <artifactId>rocketmq-demo</artifactId>
        <groupId>com.james</groupId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>

    <packaging>jar</packaging>

    <artifactId>MQProducer-demo</artifactId>

    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>com.james</groupId>
            <artifactId>common_utils</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.rocketmq/rocketmq-client -->
        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-client</artifactId>
        </dependency>

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

修改application.properties文件

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properties复制代码server.port=8082

spring.application.name=producer-demo

spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=
spring.redis.database=10

swagger.enable=true

spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8


rocketmq.name-server=localhost:9876
rocketmq.producer.group=2021-11

# 是否开启自动配置
rocketmq.producer.isOnOff=on
# 发送同一类消息设置为同一个group，保证唯一默认不需要设置，rocketmq会使用ip@pid（pid代表jvm名字）作为唯一标识
rocketmq.producer.groupName=${spring.application.name}
# mq的nameserver地址
rocketmq.producer.namesrvAddr=localhost:9876
# 消息最大长度 默认 1024 * 4 (4M)
rocketmq.producer.maxMessageSize = 4096
# 发送消息超时时间，默认 3000
rocketmq.producer.sendMsgTimeOut=3000
# 发送消息失败重试次数，默认2
rocketmq.producer.retryTimesWhenSendFailed=2

新建消息生产者配置类

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java复制代码package com.james.mq.producer.config;

import lombok.Data;
import lombok.ToString;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author james
 * @version 1.0
 * @description: 消息生产者配置
 * @date 2021/10/30 11:43
 */
@Data
@ToString
@Configuration
@ConfigurationProperties(prefix = "rocketmq.producer")
public class MQProducerConfigure {


    public static final Logger LOGGER = LoggerFactory.getLogger(MQProducerConfigure.class);

    private String groupName;
    private String namesrvAddr;
    // 消息最大值
    private Integer maxMessageSize;
    // 消息发送超时时间
    private Integer sendMsgTimeOut;
    // 失败重试次数
    private Integer retryTimesWhenSendFailed;

    /**
     * mq 生成者配置
     * @return
     * @throws MQClientException
     */
    @Bean
    @ConditionalOnProperty(prefix = "rocketmq.producer", value = "isOnOff", havingValue = "on")
    public DefaultMQProducer defaultProducer() throws MQClientException {
        LOGGER.info("defaultProducer 正在创建---------------------------------------");
        DefaultMQProducer producer = new DefaultMQProducer(groupName);
        producer.setNamesrvAddr(namesrvAddr);
        producer.setVipChannelEnabled(false);
        producer.setMaxMessageSize(maxMessageSize);
        producer.setSendMsgTimeout(sendMsgTimeOut);
        producer.setRetryTimesWhenSendAsyncFailed(retryTimesWhenSendFailed);
        producer.start();
        LOGGER.info("rocketmq producer server 开启成功----------------------------------");
        return producer;
    }
}

新建消息生产者接口

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java复制代码package com.james.mq.producer.controller;

import com.james.common.result.Result;
import com.james.common.utils.StringUtils;
import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author james
 * @version 1.0
 * @description: 消息生产者
 * @date 2021/10/30 11:12
 */
@RestController
@RequestMapping("/api")
public class ProducerController {

    public static final Logger LOGGER = LoggerFactory.getLogger(ProducerController.class);

    @Autowired
    DefaultMQProducer defaultMQProducer;

    /**
     * 发送简单的MQ消息
     * @param msg
     * @return
     */
    @GetMapping("/send")
    public Result send(String msg) throws InterruptedException, RemotingException, MQClientException, MQBrokerException {
        if (StringUtils.isEmpty(msg)) {
            return Result.OK();
        }
        LOGGER.info("发送MQ消息内容：" + msg);
        Message sendMsg = new Message("HelloTopic", "HelloTag", msg.getBytes());
        // 默认3秒超时
        SendResult sendResult = defaultMQProducer.send(sendMsg);
        LOGGER.info("消息发送响应：" + sendResult.toString());
        return Result.OK(sendResult);
    }

}

测试

生产者控制台发送消息:

截屏2021-10-31 00.20.55

(3) 创建消息消费者

pom.xml同消息生成者模块

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xml复制代码<?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>
        <artifactId>rocketmq-demo</artifactId>
        <groupId>com.james</groupId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>


    <artifactId>MQConsume-demo</artifactId>

    <packaging>jar</packaging>

    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>com.james</groupId>
            <artifactId>common_utils</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.rocketmq/rocketmq-client -->
        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-client</artifactId>
        </dependency>

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

</project>

修改配置文件

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properties复制代码spring.application.name=consumers-demo
server.port=8801

spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=
spring.redis.database=10

swagger.enable=true

spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8

# 是否开启自动配置
rocketmq.consumer.isOnOff=on
# 发送同一类消息设置为同一个group，保证唯一默认不需要设置，rocketmq会使用ip@pid（pid代表jvm名字）作为唯一标识
rocketmq.consumer.groupName=${spring.application.name}
# mq的nameserver地址
rocketmq.consumer.namesrvAddr=127.0.0.1:9876
# 消费者订阅的主题topic和tags（*标识订阅该主题下所有的tags），格式: topic~tag1||tag2||tags3;
rocketmq.consumer.topics=TestTopic~TestTag;TestTopic~HelloTag;HelloTopic~HelloTag;MyTopic~*
# 消费者线程数据量
rocketmq.consumer.consumeThreadMin=5
rocketmq.consumer.consumeThreadMax=32
# 设置一次消费信心的条数，默认1
rocketmq.consumer.consumeMessageBatchMaxSize=1

mq消费者配置

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java复制代码package com.james.mq.consume.config;

import lombok.Data;
import lombok.ToString;
import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author james
 * @version 1.0
 * @description: mq消费者配置
 * @date 2021/10/30 17:34
 */
@Data
@ToString
@Configuration
@ConfigurationProperties(prefix = "rocketmq.consumer")
public class MQConsumerConfigure {
    public static final Logger LOGGER = LoggerFactory.getLogger(MQConsumerConfigure.class);

    private String groupName;
    private String namesrvAddr;
    private String topics;
    // 消费者线程数据量
    private Integer consumeThreadMin;
    private Integer consumeThreadMax;
    private Integer consumeMessageBatchMaxSize;

    @Autowired
    private MQConsumeMsgListenerProcessor consumeMsgListenerProcessor;
    /**
     * mq 消费者配置
     * @return
     * @throws MQClientException
     */
    @Bean
    @ConditionalOnProperty(prefix = "rocketmq.consumer", value = "isOnOff", havingValue = "on")
    public DefaultMQPushConsumer defaultConsumer() throws MQClientException {
        LOGGER.info("defaultConsumer 正在创建---------------------------------------");
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer(groupName);
        consumer.setNamesrvAddr(namesrvAddr);
        consumer.setConsumeThreadMin(consumeThreadMin);
        consumer.setConsumeThreadMax(consumeThreadMax);
        consumer.setConsumeMessageBatchMaxSize(consumeMessageBatchMaxSize);
        // 设置监听
        consumer.registerMessageListener(consumeMsgListenerProcessor);

        /**
         * 设置consumer第一次启动是从队列头部开始还是队列尾部开始
         * 如果不是第一次启动，那么按照上次消费的位置继续消费
         */
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);
        /**
         * 设置消费模型，集群还是广播，默认为集群
         */
//        consumer.setMessageModel(MessageModel.CLUSTERING);

        try {
            // 设置该消费者订阅的主题和tag，如果订阅该主题下的所有tag，则使用*,
            String[] topicArr = topics.split(";");
            for (String topic : topicArr) {
                String[] tagArr = topic.split("~");
                consumer.subscribe(tagArr[0],"*");
            }
            consumer.start();
            LOGGER.info("consumer 创建成功 groupName={}, topics={}, namesrvAddr={}",groupName,topics,namesrvAddr);
        } catch (MQClientException e) {
            LOGGER.error("consumer 创建失败!");
        }
        return consumer;
    }
}

这个只是初始化操作，实际对消费者对消息处理放在 consumer.registerMessageListener(consumeMsgListenerProcessor); 这个监听类里面了，实际接收消息，处理消息都放在监听类里

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java复制代码package com.james.mq.consume.config;

import org.apache.commons.collections.CollectionUtils;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.common.message.MessageExt;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author james
 * @version 1.0
 * @description: 消费者监听
 * @date 2021/10/30 17:35
 */
@Component
public class MQConsumeMsgListenerProcessor implements MessageListenerConcurrently {
    public static final Logger LOGGER = LoggerFactory.getLogger(MQConsumeMsgListenerProcessor.class);


    /**
     * 默认msg里只有一条消息，可以通过设置consumeMessageBatchMaxSize参数来批量接收消息
     * 不要抛异常，如果没有return CONSUME_SUCCESS ，consumer会重新消费该消息，直到return CONSUME_SUCCESS
     *
     * @param msgList
     * @param consumeConcurrentlyContext
     * @return
     */
    @Override
    public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgList, ConsumeConcurrentlyContext consumeConcurrentlyContext) {
        if (CollectionUtils.isEmpty(msgList)) {
            LOGGER.info("MQ接收消息为空，直接返回成功");
            return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
        }
        MessageExt messageExt = msgList.get(0);
        LOGGER.info("MQ接收到的消息为：" + messageExt.toString());
        try {
            String topic = messageExt.getTopic();
            String tags = messageExt.getTags();
            String body = new String(messageExt.getBody(), "utf-8");

            LOGGER.info("MQ消息topic={}, tags={}, 消息内容={}", topic, tags, body);
        } catch (Exception e) {
            LOGGER.error("获取MQ消息内容异常{}", e);
        }
        // TODO 处理业务逻辑
        return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
    }

}

启动测试

截屏2021-10-31 00.47.01

如图,收到生产者消息

本文转载自: 掘金

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