SpringbootRocketMQ怎麼實現廣播訊息-java教程-PHP中文網

RocketMQ訊息模式主要有兩種：廣播模式、叢集模式（負載平衡模式）

廣播模式是每個消費者，都會消費訊息；

負載平衡模式是每一個消費只會被某一個消費者消費一次；

我們業務上一般用的是負載平衡模式，當然一些特殊場景需要用到廣播模式，比如發送一個訊息到郵箱，手機，站內提示;

我們可以透過@RocketMQMessageListener的messageModel屬性值來設置，MessageModel.BROADCASTING是廣播模式，MessageModel.CLUSTERINGING 是預設叢集負載平衡模式

下面來介紹下springboot rockermq 整合實作廣播訊息

建立Springboot項目，加入rockermq 依賴

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

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設定rocketmq

## 埠
server:
port: 8083
#設定rocketmq
rocketmq:
name-server: 127.0.0.1:9876
#生產者
producer:
#生產者群組名，規定在一個應用程式裡面必須唯一

#生產者群組名稱，規定在一個應用程式裡面必須唯一
group : group1
#訊息傳送的逾時時間預設3000ms
send-message-timeout: 3000
#訊息達到4096位元組的時候，訊息就會被壓縮。預設4096
compress-message-body-threshold: 4096
#最大的訊息限制，預設為128K
# max-message-size: 4194304
max-message-size: 4194304
重複發送訊息次數#同步傳送訊息# retry-times-when-send-failed: 3
#在內部傳送失敗時是否重試其他代理，這個參數在有多個broker時才生效
retry-next-server: true
#非同步訊息發送失敗重試的次數

retry-times-when-send-async-failed: 3

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);
        }
    }
}

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#我們先叢集負載平衡測試，加上messageModel=MessageModel.CLUSTERING

消費者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);
    }
}

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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);
    }
}

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#叢集模式測試：兩個消費者平攤訊息 SpringbootRocketMQ怎麼實現廣播訊息

消費者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);
    }
}

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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);
    }
}

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#重啟服務，測試廣播模式消費

SpringbootRocketMQ怎麼實現廣播訊息