Golang : Close channel after ticker stopped example
This is an example on how to close channel after the time.NewTicker()
function - ticker stopped. i.e close the channel when all goroutines are finished.
From the documentation http://golang.org/pkg/time/#Ticker.Stop :
Stop turns off a ticker. After Stop, no more ticks will be sent. Stop does not close the channel, to prevent a read from the channel succeeding incorrectly.
IF you are looking to close the channel, the example below maybe useful to you.
package main
import (
"fmt"
"time"
)
func keepTicking(f func()) chan bool {
done := make(chan bool, 1)
go func() {
ticker := time.NewTicker(time.Duration(1) * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
f()
case <-done:
fmt.Println("done")
return
}
}
}()
return done
}
func main() {
// continue ticking until 10 seconds and set done = true
done := keepTicking(func() {
fmt.Println("tick,tock.....")
})
time.Sleep(time.Duration(10) * time.Second)
// close the channel when all go routines are finished
close(done)
time.Sleep(time.Duration(10) * time.Second)
}
Output :
tick,tock.....
tick,tock.....
tick,tock.....
tick,tock.....
tick,tock.....
tick,tock.....
tick,tock.....
tick,tock.....
tick,tock.....
done
References :
https://www.socketloop.com/references/golang-time-newticker-stop-functions-and-ticker-type-example
By Adam Ng
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