Created
May 12, 2019 10:23
-
-
Save jnovikov/b318fe6ba9d4929e41f4a4e68595620f to your computer and use it in GitHub Desktop.
Example of channels
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"fmt" | |
"os/exec" | |
"strings" | |
"sync" | |
) | |
var wg sync.WaitGroup | |
func execCode(code string) string { | |
cmd := exec.Command(code) | |
builder := strings.Builder{} | |
cmd.Stdout = &builder | |
err := cmd.Run() | |
if err != nil { | |
return err.Error() | |
} | |
return builder.String() | |
} | |
func worker(ch chan string, out chan string) { | |
wg.Add(1) | |
for cmd := range ch { | |
t := execCode(cmd) | |
out <- t | |
} | |
wg.Done() | |
} | |
func closeOutput(out chan string) { | |
wg.Wait() | |
close(out) | |
} | |
func main() { | |
//ch := make(chan string, 100) | |
//out := make(chan string, 100) | |
// | |
//go worker(ch, out) | |
//go worker(ch, out) | |
//go worker(ch, out) | |
//go printer(out) | |
// | |
//var s string | |
//var err error | |
//n := 0 | |
//for _, err = fmt.Scanln(&s); err == nil; _, err = fmt.Scanln(&s) { | |
// fmt.Println("Readed", s) | |
// n += 1 | |
// ch <- s | |
//} | |
// | |
//time.Sleep(2 * time.Second) | |
ch := make(chan string, 10) | |
out := make(chan string, 10) | |
go worker(ch, out) | |
go worker(ch, out) | |
go worker(ch, out) | |
var err error | |
var s string | |
for _, err = fmt.Scanln(&s); err == nil; _, err = fmt.Scanln(&s) { | |
ch <- s | |
} | |
close(ch) | |
go closeOutput(out) | |
for output := range out { | |
fmt.Println(output) | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment