微服务系列笔记之RabbitMQ的入门使用

导语

上一篇文章我们讲到了broker模式，其实在Micro框架中已经为我们提供了一个rabbitMQ插件，我们可以借助这个插件来实现我们的生产与消费

启动RabbitMQ

这里推荐使用docker启动，比较迅速
rabbitmq是容器的名字

docker start rabbitmq

如果你之前从未启动过rabbitmq容器，你需要使用docker实例化一个容器

docker run -d -p 15672:15672  -p  5672:5672  -e RABBITMQ_DEFAULT_USER=admin -e RABBITMQ_DEFAULT_PASS=admin --name rabbitmq --hostname=rabbitmqhostone  rabbitmq:latest

15672 ：表示 RabbitMQ 控制台端口号，可以在浏览器中通过控制台来执行 RabbitMQ 的相关操作。
5672 : 表示 RabbitMQ 所监听的 TCP 端口号，应用程序可通过该端口与 RabbitMQ 建立 TCP 连接，完成后续的异步消息通信
RABBITMQ_DEFAULT_USER：用于设置登陆控制台的用户名，这里我设置 admin
RABBITMQ_DEFAULT_PASS：用于设置登陆控制台的密码，这里我设置 admin
现在我们可以用浏览器进行访问

image

编写客户端

定义一个主题

var (
    // 定义一个主题
    topic = "mu.micro.book.topic.payment.done"
)

发布消息

func pub() {
    tick := time.NewTicker(time.Second)
    i := 0
    for range tick.C {
        msg := &broker.Message{
            Header: map[string]string{
                "id": fmt.Sprintf("%d", i),
            },
            Body: []byte(fmt.Sprintf("%d:%s", i, time.Now().String())),
        }
        if err := broker.Publish(topic, msg); err != nil {
            log.Printf("[pub] 发布消息失败： %v", err)
        } else {
            fmt.Println("[pub] 发布消息：", string(msg.Body))
        }
        i++
    }
}

订阅消息

func sub() {
    _, err := broker.Subscribe(topic, func(p broker.Event) error {
        fmt.Printf("[sub] Received Body: %s, Header: %s\n", string(p.Message().Body), p.Message().Header)
        return nil
    }, broker.Queue("mu.micro.book.topic.queue"))
    if err != nil {
        fmt.Println(err)
    }

}

初始化broker

func main() {
    cmd.Init()

    if err := broker.Init(); err != nil {
        log.Fatalf("Broker 初始化错误：%v", err)
    }
    if err := broker.Connect(); err != nil {
        log.Fatalf("Broker 连接错误：%v", err)
    }

    go pub()
    go sub()

    <-time.After(time.Second * 20)

}

以上的代码和之前的一模一样，看不懂代码的可以看之前的关于broker的文章，这里为了可以使用rabbitMQ，我们还需要另外的一个包就是_ "github.com/micro/go-plugins/broker/rabbitmq"

启动测试

go run main.go --broker=rabbitmq --broker_address=amqp://admin:admin@192.168.10.252:5672

控制台打印

PS F:\micolearn\day02\rabbitmq> go run main.go plugin.go --broker=rabbitmq --broker_address=amqp://admin:admin@192.168.10.252:5672
[pub] 发布消息： 0:2019-08-14 14:59:05.1994723 +0800 CST m=+1.033071601[sub] Received Body: 0:2019-08-14 14:59:05.1994723 +0800 CST m=+1.033071601, Header: map[id:0]
[pub] 发布消息： 1:2019-08-14 14:59:06.1993723 +0800 CST m=+2.032971601
[sub] Received Body: 1:2019-08-14 14:59:06.1993723 +0800 CST m=+2.032971601, Header: map[id:1]
[pub] 发布消息： 2:2019-08-14 14:59:07.1993304 +0800 CST m=+3.032929701
[sub] Received Body: 2:2019-08-14 14:59:07.1993304 +0800 CST m=+3.032929701, Header: map[id:2]
[pub] 发布消息： 3:2019-08-14 14:59:08.2006233 +0800 CST m=+4.034222601
[sub] Received Body: 3:2019-08-14 14:59:08.2006233 +0800 CST m=+4.034222601, Header: map[id:3]
[pub] 发布消息： 4:2019-08-14 14:59:09.2006825 +0800 CST m=+5.034281801
[sub] Received Body: 4:2019-08-14 14:59:09.2006825 +0800 CST m=+5.034281801, Header: map[id:4]
[pub] 发布消息： 5:2019-08-14 14:59:10.2011823 +0800 CST m=+6.034781601
[sub] Received Body: 5:2019-08-14 14:59:10.2011823 +0800 CST m=+6.034781601, Header: map[id:5]
[pub] 发布消息： 6:2019-08-14 14:59:11.2000509 +0800 CST m=+7.033650201
[sub] Received Body: 6:2019-08-14 14:59:11.2000509 +0800 CST m=+7.033650201, Header: map[id:6]
exit status 2
PS F:\micolearn\day02\rabbitmq> go run main.go plugin.go --broker=rabbitmq --broker_address=amqp://admin:admin@192.168.10.252:5672
[pub] 发布消息： 0:2019-08-14 15:16:51.9162607 +0800 CST m=+1.037709901
[sub] Received Body: 0:2019-08-14 15:16:51.9162607 +0800 CST m=+1.037709901, Header: map[id:0]
[pub] 发布消息： 1:2019-08-14 15:16:52.9155533 +0800 CST m=+2.037002501
[sub] Received Body: 1:2019-08-14 15:16:52.9155533 +0800 CST m=+2.037002501, Header: map[id:1]
[pub] 发布消息： 2:2019-08-14 15:16:53.9160826 +0800 CST m=+3.037531801
[sub] Received Body: 2:2019-08-14 15:16:53.9160826 +0800 CST m=+3.037531801, Header: map[id:2]
[pub] 发布消息： 3:2019-08-14 15:16:54.9156399 +0800 CST m=+4.037089101
[sub] Received Body: 3:2019-08-14 15:16:54.9156399 +0800 CST m=+4.037089101, Header: map[id:3]
[pub] 发布消息： 4:2019-08-14 15:16:55.9155386 +0800 CST m=+5.036987801
[sub] Received Body: 4:2019-08-14 15:16:55.9155386 +0800 CST m=+5.036987801, Header: map[id:4]
[pub] 发布消息： 5:2019-08-14 15:16:56.9171838 +0800 CST m=+6.038633001
[sub] Received Body: 5:2019-08-14 15:16:56.9171838 +0800 CST m=+6.038633001, Header: map[id:5]
[pub] 发布消息： 6:2019-08-14 15:16:57.9154466 +0800 CST m=+7.036895801
[sub] Received Body: 6:2019-08-14 15:16:57.9154466 +0800 CST m=+7.036895801, Header: map[id:6]
[pub] 发布消息： 7:2019-08-14 15:16:58.9167641 +0800 CST m=+8.038213301
[sub] Received Body: 7:2019-08-14 15:16:58.9167641 +0800 CST m=+8.038213301, Header: map[id:7]
[pub] 发布消息： 8:2019-08-14 15:16:59.9160373 +0800 CST m=+9.037486501
[sub] Received Body: 8:2019-08-14 15:16:59.9160373 +0800 CST m=+9.037486501, Header: map[id:8]
[pub] 发布消息： 9:2019-08-14 15:17:00.9154771 +0800 CST m=+10.036926301
[sub] Received Body: 9:2019-08-14 15:17:00.9154771 +0800 CST m=+10.036926301, Header: map[id:9]
[pub] 发布消息： 10:2019-08-14 15:17:01.9155573 +0800 CST m=+11.037006501
[sub] Received Body: 10:2019-08-14 15:17:01.9155573 +0800 CST m=+11.037006501, Header: map[id:10]
[pub] 发布消息： 11:2019-08-14 15:17:02.9151966 +0800 CST m=+12.036645801
[sub] Received Body: 11:2019-08-14 15:17:02.9151966 +0800 CST m=+12.036645801, Header: map[id:11]
[pub] 发布消息： 12:2019-08-14 15:17:03.9162072 +0800 CST m=+13.037656401
[sub] Received Body: 12:2019-08-14 15:17:03.9162072 +0800 CST m=+13.037656401, Header: map[id:12]
[pub] 发布消息： 13:2019-08-14 15:17:04.9153942 +0800 CST m=+14.036843401
[sub] Received Body: 13:2019-08-14 15:17:04.9153942 +0800 CST m=+14.036843401, Header: map[id:13]
[pub] 发布消息： 14:2019-08-14 15:17:05.9153799 +0800 CST m=+15.036829101
[sub] Received Body: 14:2019-08-14 15:17:05.9153799 +0800 CST m=+15.036829101, Header: map[id:14]
[pub] 发布消息： 15:2019-08-14 15:17:06.915357 +0800 CST m=+16.036806201
[sub] Received Body: 15:2019-08-14 15:17:06.915357 +0800 CST m=+16.036806201, Header: map[id:15]
[pub] 发布消息： 16:2019-08-14 15:17:07.9155691 +0800 CST m=+17.037018301
[sub] Received Body: 16:2019-08-14 15:17:07.9155691 +0800 CST m=+17.037018301, Header: map[id:16]
[pub] 发布消息： 17:2019-08-14 15:17:08.9153224 +0800 CST m=+18.036771601
[sub] Received Body: 17:2019-08-14 15:17:08.9153224 +0800 CST m=+18.036771601, Header: map[id:17]
[pub] 发布消息： 18:2019-08-14 15:17:09.9280693 +0800 CST m=+19.049518501
[sub] Received Body: 18:2019-08-14 15:17:09.9280693 +0800 CST m=+19.049518501, Header: map[id:18]
PS F:\micolearn\day02\rabbitmq>

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