Golang：使用Ticker每隔几秒运行一次(Golang: Running something every few seconds with Ticker)

time.Ticker

func main() {
    hub = NewAppSocketHub()

    ticker := time.NewTicker(time.Second)
    go func() {
        for {
            log.Printf("In loop")
            select {
            case <-ticker.C:
                log.Printf("Broadcasting to %d clients", len(hub.Clients))
                hub.Broadcast <- UpdatePayload{
                    InstanceID: "Test",
                    Status:     "running",
                }
            }
        }
        log.Printf("Out of loop")
    }()

    r := chi.NewRouter()
    r.Use(render.SetContentType(render.ContentTypeJSON))
    r.Use(Cors)

    r.Post("/auth/login", Login)
    r.HandleFunc("/ws", WebSocketEcho)
    // ...

    http.ListenAndServe(":9000", r)
    log.Printf("Ended...")
}

NewAppSocketHub

2017/06/14 16:08:05 In loop
2017/06/14 16:08:06 Broadcasting to 0 clients

它似乎循环中断？ 怎么了？