rocketMQ使用

1.maven依赖

<dependency>
			<groupId>org.apache.rocketmq</groupId>
			<artifactId>rocketmq-client</artifactId>
			<version>4.3.0</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<version>RELEASE</version>
		</dependency>
		<!-- alibaba工具 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.29</version>
		</dependency>

2.application.yml配置

apache:
  rocketmq:
    consumer:
      pushConsumer: tt
    producer:
      producerGroup: tt
    namesrvAddr: 127.0.0.1:9876

3.producer

import org.apache.commons.lang3.time.StopWatch;
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.common.RemotingHelper;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.io.UnsupportedEncodingException;


@Component
public class Producer {

 
    
    @Value("${apache.rocketmq.producer.producerGroup}")
    private String producerGroup;

    private DefaultMQProducer producer;
    
    @Value("${apache.rocketmq.namesrvAddr}")
    private String namesrvAddr;

    @PostConstruct
    public void defaultMQProducer() {

        //生产者的组名
        producer= new DefaultMQProducer(producerGroup);
        //指定NameServer地址，多个地址以 ; 隔开
        producer.setNamesrvAddr(namesrvAddr);
        producer.setVipChannelEnabled(false);
        try {
            producer.start();
            System.out.println("-------->:producer启动了");
        } catch (MQClientException e) {
            e.printStackTrace();
        }
    }

    public String send(String topic,String tags,String body) throws InterruptedException, RemotingException, MQClientException, MQBrokerException, UnsupportedEncodingException {
        Message message = new Message(topic, tags, body.getBytes(RemotingHelper.DEFAULT_CHARSET));
        StopWatch stop = new StopWatch();
        stop.start();
        SendResult result = producer.send(message);
        System.out.println("发送响应：MsgId:" + result.getMsgId() + "，发送状态:" + result.getSendStatus());
        stop.stop();
        return "{\"MsgId\":\""+result.getMsgId()+"\"}";
    }

}

4.consumer

import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
import org.apache.rocketmq.common.message.Message;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.CommandLineRunner;

import org.springframework.stereotype.Component;

@Component
public class Consumer implements CommandLineRunner {

    /**
     * 消费者
     */
    @Value("${apache.rocketmq.consumer.pushConsumer}")
    private String pushConsumer;

    /**
     * NameServer 地址
     */
    @Value("${apache.rocketmq.namesrvAddr}")
    private String namesrvAddr;


    /**
     * 初始化RocketMq的监听信息，渠道信息
     */
    public void messageListener(){

        DefaultMQPushConsumer consumer=new DefaultMQPushConsumer(pushConsumer);

        consumer.setNamesrvAddr(namesrvAddr);
        try {

            // 订阅PushTopic下Tag为push的消息,都订阅消息
            consumer.subscribe("addTopic", "addMsg");

            // 程序第一次启动从消息队列头获取数据
            consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
            //可以修改每次消费消息的数量，默认设置是每次消费一条
            consumer.setConsumeMessageBatchMaxSize(1);

            //在此监听中消费信息，并返回消费的状态信息
            consumer.registerMessageListener((MessageListenerConcurrently) (msgs, context) -> {

                // 会把不同的消息分别放置到不同的队列中
                for(Message msg:msgs){

                    System.out.println("接收到了消息："+new String(msg.getBody()));
                }
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            });

            consumer.start();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void run(String... args) throws Exception {
        this.messageListener();
    }
}

5.测试

 @RequestMapping("/addMsg")
    public String addMsg(String msg){
        try {
            return producer.send("addTopic","addMsg",msg);
        } catch (Exception e) {
            e.printStackTrace();
        } 
        return "ERROR";
    }