Newticker uses

I don't say much nonsense , Look directly at the code

1. package main

3. import (

4. "fmt"

5. "sync"

6. "time"

7. )

9. /**

10. *ticker As long as the definition is complete , From this moment on , No other operation is required , Trigger every fixed time .

11. *timer Timer , It will be executed once after a fixed time

12. * If timer The timer is executed at intervals , Realization ticker The effect of , Use func (t *Timer) Reset(d Duration) bool

13. */

14. func main() {

15. var wg sync.WaitGroup

16. wg.Add(2)

17. //NewTimer Create a Timer, It will be at least in the past d To expire after , To its own C Field sent at

18. timer1 := time.NewTimer(2 * time.Second)

20. //NewTicker Back to a new Ticker, The Ticker Contains a channel field , And every once in a while d Send the current time to the channel . It can tune

21. // Whole time interval or discard tick Information to accommodate slow responders . If d <= 0 Will trigger panic. Close the Ticker can

22. // To release resources .

23. ticker1 := time.NewTicker(2 * time.Second)

25. go func(t *time.Ticker) {

26. defer wg.Done()

27. for {

28. <-t.C

29. fmt.Println("get ticker1", time.Now().Format("2006-01-02 15:04:05"))

30. }

31. }(ticker1)

33. go func(t *time.Timer) {

34. defer wg.Done()

35. for {

36. <-t.C

37. fmt.Println("get timer", time.Now().Format("2006-01-02 15:04:05"))

38. //Reset send t Restart the clock ,（ After this method returns ） Waiting period d Due in the past . If you call t

39. // Still waiting to return to true ; If t Has expired or has been stopped will return to leave .

40. t.Reset(2 * time.Second)

41. }

42. }(timer1)

44. wg.Wait()

45. }

Running results ：

1. get ticker1 2018-09-07 22:44:29

2. get timer 2018-09-07 22:44:29

3. ...

Additional instructions ：

time.NewTicker Regularly trigger the execution of tasks , When the next execution comes and the current task is not finished , It will wait for the current task to be executed before executing the next task . Look up go Official website documentation and code validation .

time.NewTimer and Reset() Function implementation timing trigger ,Reset() The function may fail , After testing .

Reprinted to

https://golangcaff.com/articles/230/the-difference-between-go-timer-and-ticker