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two ways to call a function every 2 seconds
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package main | |
import ( | |
"fmt" | |
"time" | |
) | |
// Suggestions from golang-nuts | |
// http://play.golang.org/p/Ctg3_AQisl | |
func doEvery(d time.Duration, f func(time.Time)) { | |
for x := range time.Tick(d) { | |
f(x) | |
} | |
} | |
func helloworld(t time.Time) { | |
fmt.Printf("%v: Hello, World!\n", t) | |
} | |
func main() { | |
doEvery(20*time.Millisecond, helloworld) | |
} |
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package main | |
import ( | |
"fmt" | |
"time" | |
"net/http" | |
) | |
func doSomething(s string) { | |
fmt.Println("doing something", s) | |
} | |
func startPolling1() { | |
for { | |
time.Sleep(2 * time.Second) | |
go doSomething("from polling 1") | |
} | |
} | |
func startPolling2() { | |
for { | |
<-time.After(2 * time.Second) | |
go doSomething("from polling 2") | |
} | |
} | |
func handler(w http.ResponseWriter, r *http.Request) { | |
fmt.Fprintf(w, "Hi there, I love %s!", r.URL.Path[1:]) | |
} | |
func main() { | |
go startPolling1() | |
go startPolling2() | |
http.HandleFunc("/", handler) | |
http.ListenAndServe(":8080", nil) | |
} |
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