golang使用Timer & Ticker worker
http://blog.wuxu92.com/notes-of-go-by-example-part-3/
https://blog.csdn.net/lanyang123456/article/details/79794183
一般使用以下方式去 sleep
t := time.NewTicker(10 * time.Second)
defer t.Stop()
for {
<-t.C
log.Infoln("lalala")
}