loop

This example runs a loop, controlled by a periodic ticker. The called function is wrapped with a logger, that logs on every invocation and on error.

ticker := ticker.NewTimer(time.Second)
time.AfterFunc(2500*time.Millisecond, ticker.Stop)
startTime := time.Now()

// The tick function returns temporary error.
err := OnTick(ticker.Ticks(),
	func(_ context.Context, tick time.Time) error {
		fmt.Println("tick", tick.Sub(startTime).Round(time.Second))
		return fmt.Errorf("oops")
	})

fmt.Println(err)

Output:

tick 0s
tick 1s
tick 2s
oops