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Springboot广播消息

12程序猿 人气:2

RocketMQ消息模式主要有两种:广播模式、集群模式(负载均衡模式)

广播模式是每个消费者,都会消费消息;

负载均衡模式是每一个消费只会被某一个消费者消费一次;

我们业务上一般用的是负载均衡模式,当然一些特殊场景需要用到广播模式,比如发送一个信息到邮箱,手机,站内提示;

我们可以通过@RocketMQMessageListenermessageModel属性值来设置,MessageModel.BROADCASTING是广播模式,MessageModel.CLUSTERING是默认集群负载均衡模式

下面来介绍下 springboot+rockermq 整合实现 广播消息

<!--rocketMq依赖-->
<dependency>
    <groupId>org.apache.rocketmq</groupId>
    <artifactId>rocketmq-spring-boot-starter</artifactId>
    <version>2.2.1</version>
</dependency>

# 端口
server:
  port: 8083

# 配置 rocketmq
rocketmq:
  name-server: 127.0.0.1:9876
  #生产者
  producer:
    #生产者组名,规定在一个应用里面必须唯一
    group: group1
    #消息发送的超时时间 默认3000ms
    send-message-timeout: 3000
    #消息达到4096字节的时候,消息就会被压缩。默认 4096
    compress-message-body-threshold: 4096
    #最大的消息限制,默认为128K
    max-message-size: 4194304
    #同步消息发送失败重试次数
    retry-times-when-send-failed: 3
    #在内部发送失败时是否重试其他代理,这个参数在有多个broker时才生效
    retry-next-server: true
    #异步消息发送失败重试的次数
    retry-times-when-send-async-failed: 3

生产端按正常发送逻辑发送消息即可

package com.example.springbootrocketdemo.controller;
import org.apache.rocketmq.spring.core.RocketMQTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * 广播消息
 * @author qzz
 */
@RestController
public class RocketMQBroadCOntroller {
    @Autowired
    private RocketMQTemplate rocketMQTemplate;
    /**
     * 发送广播消息
     */
    @RequestMapping("/testBroadSend")
    public void testSyncSend(){
        //参数一:topic   如果想添加tag,可以使用"topic:tag"的写法
        //参数二:消息内容
        for(int i=0;i<10;i++){
            rocketMQTemplate.convertAndSend("test-topic-broad","test-message"+i);
        }
    }
}

我们先集群负载均衡测试,加上messageModel=MessageModel.CLUSTERING

消费者1:

package com.example.springbootrocketdemo.config;
import org.apache.rocketmq.spring.annotation.MessageModel;
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.stereotype.Service;
/**
 * 广播消息
 * 配置RocketMQ监听
 * MessageModel.CLUSTERING:集群模式
 * MessageModel.BROADCASTING:广播模式
 * @author qzz
 */
@Service
@RocketMQMessageListener(consumerGroup = "test-broad",topic = "test-topic-broad",messageModel = MessageModel.CLUSTERING)
public class RocketMQBroadConsumerListener implements RocketMQListener<String> {
    @Override
    public void onMessage(String s) {
        System.out.println("集群模式 消费者1,消费消息:"+s);
    }
}

消费者2: 与消费者1在 同一个consumerGroup 和 topic

package com.example.springbootrocketdemo.config;
import org.apache.rocketmq.spring.annotation.MessageModel;
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.stereotype.Service;
/**
 * 广播消息
 * 配置RocketMQ监听
 * MessageModel.CLUSTERING:集群模式
 * MessageModel.BROADCASTING:广播模式
 * @author qzz
 */
@Service
@RocketMQMessageListener(consumerGroup = "test-broad",topic = "test-topic-broad",messageModel = MessageModel.CLUSTERING)
public class RocketMQBroadConsumerListener2 implements RocketMQListener<String> {
    @Override
    public void onMessage(String s) {
        System.out.println("集群模式 消费者2,消费消息:"+s);
    }
}

集群模式测试: 两个消费者平摊 消息

消费者1:

package com.example.springbootrocketdemo.config;
import org.apache.rocketmq.spring.annotation.MessageModel;
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.stereotype.Service;
/**
 * 广播消息
 * 配置RocketMQ监听
 * MessageModel.CLUSTERING:集群模式
 * MessageModel.BROADCASTING:广播模式
 * @author qzz
 */
@Service
@RocketMQMessageListener(consumerGroup = "test-broad",topic = "test-topic-broad",messageModel = MessageModel.BROADCASTING)
public class RocketMQBroadConsumerListener implements RocketMQListener<String> {
    @Override
    public void onMessage(String s) {
        System.out.println("广播消息1 广播模式,消费消息:"+s);
    }
}

消费者2: 与消费者1在 同一个consumerGroup 和 topic

package com.example.springbootrocketdemo.config;
import org.apache.rocketmq.spring.annotation.MessageModel;
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.stereotype.Service;
/**
 * 广播消息
 * 配置RocketMQ监听
 * MessageModel.CLUSTERING:集群模式
 * MessageModel.BROADCASTING:广播模式
 * @author qzz
 */
@Service
@RocketMQMessageListener(consumerGroup = "test-broad",topic = "test-topic-broad",messageModel = MessageModel.BROADCASTING)
public class RocketMQBroadConsumerListener2 implements RocketMQListener<String> {
    @Override
    public void onMessage(String s) {
        System.out.println("广播消息2 广播模式,消费消息:"+s);
    }
}

广播模式消费下,两个消费者都消费到Topic的所有消息。

测试成功!

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