在Go中执行协调的goroutine

Question

I would like to know how to coordinate routines in Go. A real case would be to coordinate two resources obtained through a request http. For example in node Nodejs would solve this with: Promise.all [service1, service2]

func request(c chan bool, ms time.Duration, val bool) {
    time.Sleep(ms * time.Millisecond)
    c <- val
}

func main() {
    c := make(chan bool, 2)
    go request(c, 1000, true)
    go request(c, 0, false)
    first, second := <-c, <-c
    fmt.Println(first, second) // output false true

}

The first one to be resolved is placed over the others, but how can I identify each one?

Thanks for you time.

Answer 1

Use 2 channels. They will still run concurrently, and you can keep track of which is which.

func request(c chan bool, ms time.Duration, val bool) {
    time.Sleep(ms * time.Millisecond)
    c <- val
}

func main() {
    c1 := make(chan bool)
    c2 := make(chan bool)

    go request(c1, 1000, true)
    go request(c2, 0, false)
    first := <-c1
    second := <-c2
    fmt.Println(first, second) // output false true

}