rabbitMq 交换机介绍 golang 版本 - 不用交换机的队列

rabbitMq有四种类型的交换机fanout、direct、topic、headers

---

生产者示例 producer.go

package main

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

func main() {
    conn, err := amqp.Dial("amqp://user:password@host:ip/vhost")
    if err != nil {
        log.Fatalf(" %s", err)
    }
    defer conn.Close()

    ch, err := conn.Channel()
    if err != nil {
        log.Fatalf("%s", err)
    }
    defer ch.Close()

    body := "Hello World! " + time.Now().Format("2006-01-02 15:04:05")
    fmt.Println(body)

    ch.QueueDeclare(
        "j_test_delay", // name
        false,          // durable
        false,          // delete when unused
        false,          // exclusive
        false,          // no-wait
        nil,            // arguments
    )

    err = ch.Publish(
        "",             // exchange 这里为空则不选择 exchange
        "j_test_delay", // routing key
        false,          // mandatory
        false,          // immediate
        amqp.Publishing{
            ContentType: "text/plain",
            Body:        []byte(body),
        })

}

$ go run producer.go
Hello World! 2021-03-17 18:05:39

消费者 consumer.go

package main

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

func main() {
    conn, err := amqp.Dial("amqp://user:password@host:ip/vhost")
    if err != nil {
        fmt.Printf("%s", err)
    }

    defer conn.Close()

    ch, err := conn.Channel()
    if err != nil {
        fmt.Printf("%s", err)
    }
    defer ch.Close()

    msgs, err := ch.Consume(
        "j_test_delay", // queue
        "",     // consumer
        true,   // auto-ack
        false,  // exclusive
        false,  // no-local
        false,  // no-wait
        nil,    // args
    )
    if err != nil {
        log.Fatal(err)
    }
    forever := make(chan bool)
    go func() {
        for d := range msgs {
            log.Printf("Received a message: %s", d.Body)
        }
    }()
    log.Printf(" [*] Waiting for queue. To exit press CTRL+C")
    <-forever

}

$ go run consumer.go
2021/03/17 18:05:13  [*] Waiting for queue. To exit press CTRL+C
2021/03/17 18:05:20 message: Hello World! 2021-03-17 18:05:20
2021/03/17 18:05:39 message: Hello World! 2021-03-17 18:05:39