springboot 整合rocketmq

centos7安装rocketmq

在rocketmq官网下载压缩包
官网地址：https://www.apache.org/dyn/closer.cgi?path=rocketmq/4.7.1/rocketmq-all-4.7.1-bin-release.zip

下载到本地后上传至centos7，我的上传路径为/usr/rocektmq
，然后解压

unzip rocketmq-all-4.7.1-bin-release.zip 

解压后进入目录

cd rocketmq-all-4.7.1-bin-release

创建logs目录用于存放日志文件

mkdir logs

修改nameserver和broker默认内存为2g

vi bin/runserver.sh 

vi bin/runbroker.sh

nameserver后台挂载启动

nohup sh bin/mqnamesrv > /usr/rocektmq/rocketmq-all-4.7.1-bin-release/logs/namesrv.log 2>&1 &

修改broker.conf

vi broker.conf 

加一行brokerIP1 = 192.168.130.128，指定ip

启动mqbroker

nohup sh bin/mqbroker -c conf/broker.conf -n localhost:9876 > /usr/rocektmq/rocketmq-all-4.7.1-bin-release/logs/broker.log 2>&1 &

关闭broker和nameserver

./bin/mqshutdown broker

./bin/mqshutdown namesrv

创建一个topic

./bin/mqadmin updateTopic -n '192.168.130.128:9876' -c DefaultCluster -t TopicTest

查看集群状态

./bin/mqadmin clusterList -n localhost:9876

至此rocketmq的安装已经讲解完毕了。
下面通过springboot来集成rocketmq

springboot整合rocketmq

pom文件

<?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>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.3.RELEASE</version>
		<relativePath/>
	</parent>
	<groupId>com.sunyuqi</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.apache.rocketmq</groupId>
			<artifactId>rocketmq-spring-boot-starter</artifactId>
			<version>2.1.0</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

配置文件

rocketmq:
  name-server: 192.168.130.128:9876
  producer:
    group: my-group

myrocketmq-config:
  my-topic: my_topic
  my-consumer-group: my_consumer_group

引导类

package com.sunyuqi;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {
    
    

	public static void main(String[] args) {
    
    
		SpringApplication.run(DemoApplication.class, args);
	}
}

消费者
需要继承RocketMQListener接口，此处泛型为String，如果需要监听对象，请填写自定义对象名

package com.sunyuqi.consumer;

import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.stereotype.Component;

@Component
@RocketMQMessageListener(consumerGroup = "${myrocketmq-config.my-consumer-group}", topic = "${myrocketmq-config.my-topic}")
public class Consumer implements RocketMQListener<String> {
    
    

    @Override
    public void onMessage(String message) {
    
    
        System.out.println("收到消息: "+message);
    }
}

消息发送者

package com.sunyuqi.produce;

import org.apache.rocketmq.client.producer.SendCallback;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.spring.core.RocketMQTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;


@Component
public class RocketProduce {
    
    

    @Value("${myrocketmq-config.my-topic}")
    private String my_topic;

    @Value("${myrocketmq-config.my-consumer-group}")
    private String my_consumer_group;

    @Autowired
    private RocketMQTemplate rocketMQTemplate;

    //同步发送
    public void sync(){
    
    
        String msg = "hello world";
        SendResult sendResult = rocketMQTemplate.syncSend(my_topic, msg);
        System.out.println("同步发送字符串: " + msg + "至topic: "+my_topic+",发送结果: " + sendResult);
    }

    //异步发送
    public void async(){
    
    

        rocketMQTemplate.asyncSend("test", "Hello world!", new SendCallback() {
    
    
            @Override
            public void onSuccess(SendResult var1) {
    
    
                System.out.println("异步发送成功: "+ var1);
            }
            @Override
            public void onException(Throwable var1) {
    
    
                System.out.println("异步发送失败: "+ var1);
            }
        });
    }

    //单向发送
    public void oneway(){
    
    
        rocketMQTemplate.sendOneWay("test", "Hello world!");
        System.out.println("单向发送");
    }
}

rocketmq有三种消息发送方式，分别为同步发送，异步发送，单发
同步发送：只有在消息完全发送完成之后才返回结果，此方式存在需要同步等待发送结果的时间代价。
异步发送：消息发送后立刻返回，当消息完全完成发送后，会调用回调函数sendCallback来告知发送者本次发送是成功或者失败。
单发：发送完消息后会立即返回，不会等待来自broker的ack来告知本次消息发送是否完全完成发送。