# 4.6 调用RocketMQ

# 4.6.1 简介

client/rocketmq xn--github-9y4jp50dfvv.com/apache/rocketmq-client-go/v2 进行二次封装

# 4.6.2 配置规范

配置说明 (opens new window)

# 4.6.3 用法

访问rocketmq示例 (opens new window)

// run: go run main.go --config=config.toml

package main

import (
    "context"
    "fmt"
    "strconv"

    "github.com/apache/rocketmq-client-go/v2/primitive"
    "github.com/douyu/jupiter"
    "github.com/douyu/jupiter/pkg/client/rocketmq"
    "github.com/douyu/jupiter/pkg/xlog"
)

// run: go run main.go -config=config.toml
type Engine struct {
    jupiter.Application
}

func NewEngine() *Engine {
    eng := &Engine{}
    if err := eng.Startup(
        eng.exampleRocketMQProducer,
        eng.exampleRocketMQConsumer,
    ); err != nil {
        xlog.Panic("startup", xlog.Any("err", err))
    }
    return eng
}

func main() {
    app := NewEngine()
    if err := app.Run(); err != nil {
        panic(err)
    }
}

func (eng *Engine) exampleRocketMQConsumer() (err error) {
    consumerClient := rocketmq.StdPushConsumerConfig("configName").Build()
    defer func() {
        if consumerClient.Enable {
            _ = consumerClient.Close()
        }
    }()
    consumerClient.Subscribe(consumerClient.ConsumerConfig.Topic, func(ctx context.Context, ext *primitive.MessageExt) error {
        fmt.Println("msg...", string(ext.Message.Body))
        fmt.Println("msg topic...", string(ext.Message.Topic))
        fmt.Println("msg topic tag...", string(ext.Message.GetTags()))
        return nil
    })
    err = consumerClient.Start()
    return
}

func (eng *Engine) exampleRocketMQProducer() (err error) {
    producerClient := rocketmq.StdProducerConfig("configName").Build()
    defer func() {
        _ = producerClient.Close()
    }()

    err = producerClient.Start()
    if err != nil {
        return
    }

    for i := 0; i < 10; i++ {
        msg := "a" + strconv.Itoa(i)
        err = producerClient.Send([]byte(msg))
    }
    return
}

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执行 go run main.go --config=config.toml,可以看到如下图结果 image