一、github克隆rocketmq项目并构建

添加环境变量

JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home

git clone https://github.com/apache/rocketmq.git
cd rocketmq
mvn -Prelease-all -DskipTests clean install -U
cd distribution/target/rocketmq-4.7.1/rocketmq-4.7.1

安装遇到报错，参考解决方法：

aMac&Ubuntu安装rocketMQ – 简书

二、启动名称服务器

nohup sh bin/mqnamesrv &
tail -f ~/logs/rocketmqlogs/namesrv.log
The Name Server boot success. serializeType=JSON

遇到报错

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Unrecognized VM option 'UseCMSCompactAtFullCollection'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

java版本太高，相关命令已删除，不兼容。

解决办法安装java8，电脑里存在java多个版本把当前版本指向java8

//  查看mac中安装的java版本
ls /Library/Java/JavaVirtualMachines

// 本机版本如下
adoptopenjdk-8.jdk openjdk-13.0.1.jdk

// 查看当前指向的java版本
echo $JAVA_HOME

// 修改环境变量指向低版本java
export JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home

然后再次启动正常

三、启动broker

添加环境变量

ROCKETMQ_HOME=/Users/chenpeng/software/rocketmq/distribution/target/rocketmq-4.7.1/rocketmq-4.7.1

nohup sh bin/mqbroker -n localhost:9876 autoCreateTopicEnable=true &
tail -f ~/logs/rocketmqlogs/broker.log 

四、发送和接受消息

在发送/接收消息之前，我们需要告知客户端名称服务器所在的位置。
RocketMQ 提供了多种方法来实现这一点。
为了简单起见，我们使用环境变量 NAMESRV_ADDR

export NAMESRV_ADDR=localhost:9876
sh bin/tools.sh org.apache.rocketmq.example.quickstart.Consumer

sh bin/tools.sh org.apache.rocketmq.example.quickstart.Producer

五、关闭服务

sh bin/mqshutdown broker

The mqbroker(36695) is running...
Send shutdown request to mqbroker(36695) OK

sh bin/mqshutdown namesrv

The mqnamesrv(36664) is running...
Send shutdown request to mqnamesrv(36664) OK

六、go代码示例

使用官方包https://github.com/apache/rocketmq-client-go

go get github.com/apache/rocketmq-client-go/v2

包里路径examples中有代码实例，这里贴一下

Consummer

package main

import (
	"context"
	"fmt"
	"os"
	"time"

	"github.com/apache/rocketmq-client-go/v2"
	"github.com/apache/rocketmq-client-go/v2/consumer"
	"github.com/apache/rocketmq-client-go/v2/primitive"
)

func main() {
	c, _ := rocketmq.NewPushConsumer(
		consumer.WithGroupName("testGroup"),
		consumer.WithNameServer([]string{"127.0.0.1:9876"}),
                // 多个consumer消费同一个group，同一个topic instance要设置唯一值，否则报错
                // consumer.WithInstance("instance name"),
	)
	err := c.Subscribe("test", consumer.MessageSelector{}, func(ctx context.Context,
		msgs ...*primitive.MessageExt) (consumer.ConsumeResult, error) {
		for i := range msgs {
			fmt.Printf("subscribe callback: %v \n", msgs[i])
		}

		return consumer.ConsumeSuccess, nil
	})
	if err != nil {
		fmt.Println(err.Error())
	}
	// Note: start after subscribe
	err = c.Start()
	if err != nil {
		fmt.Println(err.Error())
		os.Exit(-1)
	}
	time.Sleep(time.Hour)
	err = c.Shutdown()
	if err != nil {
		fmt.Printf("shutdown Consumer error: %s", err.Error())
	}
}

注：多个consumer消费同一个group，同一个topic instance要设置唯一值，否则报错

Producer

package main

import (
	"context"
	"fmt"
	"os"
	"strconv"

	"github.com/apache/rocketmq-client-go/v2"
	"github.com/apache/rocketmq-client-go/v2/primitive"
	"github.com/apache/rocketmq-client-go/v2/producer"
)

// Package main implements a simple producer to send message.
func main() {
	p, _ := rocketmq.NewProducer(
		producer.WithNameServer([]string{"127.0.0.1:9876"}),
		producer.WithRetry(2),
	)
	err := p.Start()
	if err != nil {
		fmt.Printf("start producer error: %s", err.Error())
		os.Exit(1)
	}
	topic := "test"

	for i := 0; i < 10; i++ {
		msg := &primitive.Message{
			Topic: topic,
			Body:  []byte("Hello RocketMQ Go Client! " + strconv.Itoa(i)),
		}
		res, err := p.SendSync(context.Background(), msg)

		if err != nil {
			fmt.Printf("send message error: %s\n", err)
		} else {
			fmt.Printf("send message success: result=%s\n", res.String())
		}
	}
	err = p.Shutdown()
	if err != nil {
		fmt.Printf("shutdown producer error: %s", err.Error())
	}
}

7、官网文档

Quick Start – Apache RocketMQ

https://github.com/apache/rocketmq/tree/master/docs/cn