golang寫第一個rabbitmq程式

1.介紹

使用amqp的庫用golang語言進行rabbitmq的開發，此文章的代碼可以用來安裝完成rabbitmq後，進行測試。也可以作為學習rabbitmq的第一個測試程式。

2.golang rabbitmq庫地址

https://github.com/streadway/amqp

3.錯誤處理

func failOnErr(err error, msg string) {    if err != nil {        fmt.Println("msg", err, msg)        panic("error")    }}

4. 建立串連

func mqConnect() {    var err error    conn, err = amqp.Dial(mqurl)    failOnErr(err, "connect")    channel , err = conn.Channel()    failOnErr(err, "channel")}

5.中斷連線

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

6.聲明交換器、訊息佇列並發送訊息

func push() {    if channel == nil {        mqConnect()    }    mgsConnect := "hello world"    err := channel.ExchangeDeclare(exchange, "direct", false, false, false,false, nil)    failOnErr(err, "ExchangeDeclare")    _, err = channel.QueueDeclare(queueName, false, false,        false, false, nil)    failOnErr(err, "QueueDeclare")    err = channel.QueueBind(queueName, "info", exchange, false, nil)    failOnErr(err, "QueueBind")    err = channel.Publish(exchange, "info", false, false, amqp.Publishing{        ContentType:"text/plain", Body:[]byte(mgsConnect),    })    failOnErr(err, "Publish")    fmt.Println("push ok")}

.7消費訊息

func receive() {    if channel == nil {        mqConnect()    }    msg, ok, err := channel.Get(queueName, false)    failOnErr(err, "")    if !ok {        fmt.Println("do not get msg")        return    }    err = channel.Ack(msg.DeliveryTag, false)    failOnErr(err, "")    s := BytesToString(&(msg.Body))    fmt.Printf("receve msg is :%s\n", *s)}func BytesToString(b *[]byte) *string {    s := bytes.NewBuffer(*b)    r := s.String()    return &r}

.8程式入口

package mainimport (    "github.com/streadway/amqp"    "fmt"    "bytes")var conn *amqp.Connectionvar channel *amqp.Channelconst (    queueName = "hello"    exchange = "exchange1"    mqurl = "amqp://username:password@localhost:5672/")func main() {    push()    receive()    fmt.Println("end")    close()}