Publish Pesan ke RabbitMQ Menggunakan Bahasa Golang

Publish on Mar 26, 2022 by Alfin F

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Pada tutorial sebelumnya kita telah belajar cara menginstal RabbitMQ mengunakan docker compose di local komputer.

Ditutorial kali ini kita akan belajar bagaimana cara publish pesan ke RabbitMQ menggunakan bahasa golang.

Untuk mengikuti tutorial ini pastikan bahwa Anda sudah menginstall RabbitMQ dan juga sudah menginstall Golang di local computer Anda.

Jika Anda belum menginstall Golang, Anda bisa membacanya di dokumentasi instalasi bahasa Go.

Perhatikan kode dibawah ini, buat dua buah file dengan nama publisher.go dan konsumer.go

publisher.go :

package main

import (
	"log"

	"github.com/streadway/amqp"
)

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

func main() {
	conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
	errorWrapper(err, "Failed to connect rabbitmq")
	defer conn.Close()

	ch, err := conn.Channel()
	errorWrapper(err, "Failed to open a channel")
	defer ch.Close()

	q, err := ch.QueueDeclare(
		"golang-queue", //name
		false,          // durable
		false,          //delete when unused
		false,          // exclusive
		false,          // no-wait
		nil,            // arguments
	)
	errorWrapper(err, "Failed to declare a queue")

	body := "Hi halovina, keep in touch"
	err = ch.Publish(
		"",     // exchange
		q.Name, // routing key
		false,  // mandatory
		false,  // immadiate
		amqp.Publishing{
			ContentType: "text/plain",
			Body:        []byte(body),
		})

	errorWrapper(err, "Failed to publish message")
	log.Printf("Sending message success: %s", body)

}

consumer.go:

package main

import (
	"log"

	"github.com/streadway/amqp"
)

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

func main() {
	conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
	errorWrapper(err, "Failed to connect rabbitmq")
	defer conn.Close()

	ch, err := conn.Channel()
	errorWrapper(err, "Failed to open a channel")
	defer ch.Close()

	q, err := ch.QueueDeclare(
		"golang-queue", //name
		false,          // durable
		false,          //delete when unused
		false,          // exclusive
		false,          // no-wait
		nil,            // arguments
	)
	errorWrapper(err, "Failed to declare a queue")

	msg, err := ch.Consume(
		q.Name, // queue
		"",     // consumer
		true,   // auto-ack
		false,  // exclusive
		false,  // no-local
		false,  // no-wait
		nil,    // args
	)
	errorWrapper(err, "Failed to register a consumer")

	forever := make(chan bool)
	go func() {
		for d := range msg {
			log.Printf("received as message: %s", d.Body)
		}
	}()
	log.Printf("waiting for message. to exit press CTRL+C")
	<-forever
}