Go语言示例 --14周期性执行函数

1. Time

Go的Time函数库用于实现周期性调用某个函数。

periodlycall.go实现了周期性调用函数function()，比如每秒调用一次函数function()。

1.1. 方法一

package main import ( "fmt" "time" ) func periodlycall(d time.Duration, f func(time.Time)) { for x := range time.Tick(d) { f(x) } } func function(t time.Time) { fmt.Printf("%v: Hello, World \n", t) } func main() { periodlycall(1000*time.Millisecond, function) }

解释执行。

# go run periodlycall.go 2019-05-23 07:45:13.567121692 +0000 UTC m=+1.000460791: Hello, World 2019-05-23 07:45:14.567131059 +0000 UTC m=+2.000470157: Hello, World 2019-05-23 07:45:15.567173671 +0000 UTC m=+3.000512773: Hello, World 2019-05-23 07:45:16.567128114 +0000 UTC m=+4.000467201: Hello, World 2019-05-23 07:45:17.567059872 +0000 UTC m=+5.000398958: Hello, World 2019-05-23 07:45:18.567239709 +0000 UTC m=+6.000578788: Hello, World 2019-05-23 07:45:19.567059851 +0000 UTC m=+7.000398930: Hello, World 2019-05-23 07:45:20.56705725 +0000 UTC m=+8.000396336: Hello, World 2019-05-23 07:45:21.567058003 +0000 UTC m=+9.000397082: Hello, World

1.2. 方法二

package main import ( "fmt" "time" ) func function() { fmt.Println("Hello, World") } func periodlycall() { for { time.Sleep(10*time.Millisecond) function() } } func main() { periodlycall() }

解释执行。

# go run periodlycall2.go Hello, World Hello, World Hello, World Hello, World Hello, World Hello, World Hello, World

参考资料

[1. Go语言Time库的应用] https://play.golang.org/p/Rgc_UDvHv6a