RabbitMQ–go

接收和傳送例項（下面是完整程式碼）：

package main

import (
    "fmt"
    "log"
    "bytes"
    "time"
    "github.com/streadway/amqp"
)

var conn *amqp.Connection
var channel *amqp.Channel
var count = 0

const (
    queueName = "push.msg.q"
    exchange  = "t.msg.ex"
    mqurl ="amqp://shi:[email protected]
 
:5672/test"
)

func main() {
    go func() {
        for {
            push()
            time.Sleep(1 * time.Second)
        }
    }()
    receive()
    fmt.Println("end")
    close()
}

func failOnErr(err error, msg string) {
    if err != nil {
        log.Fatalf("%s:%s", msg, err)
        panic(fmt.Sprintf("%s:%s"
 
, msg, err))
    }
}

func mqConnect() {
    var err error
    conn, err = amqp.Dial(mqurl)
    failOnErr(err, "failed to connect tp rabbitmq")

    channel, err = conn.Channel()
    failOnErr(err, "failed to open a channel")
}

func close() {
    channel.Close()
    conn.Close()
}

//連線rabbitmq server
 

func push() {

    if channel == nil {
        mqConnect()
    }
    msgContent := "hello world!"

    channel.Publish(exchange, queueName, false, false, amqp.Publishing{
        ContentType: "text/plain",
        Body:        []byte(msgContent),
    })
}

func receive() {
    if channel == nil {
        mqConnect()
    }

    msgs, err := channel.Consume(queueName, "", true, false, false, false, nil)
    failOnErr(err, "")

    forever := make(chan bool)

    go func() {
        //fmt.Println(*msgs)
        for d := range msgs {
            s := BytesToString(&(d.Body))
            count++
            fmt.Printf("receve msg is :%s -- %d\n", *s, count)
        }
    }()

    fmt.Printf(" [*] Waiting for messages. To exit press CTRL+C\n")
    <-forever
}

func BytesToString(b *[]byte) *string {
    s := bytes.NewBuffer(*b)
    r := s.String()
    return &r
}