looper

publish.go

	viper.SetDefault("push.frequency", 100)
	d.timer = time.NewTicker(viper.GetDuration("push.frequency") * time.Millisecond)
	//Make interface for netInterface we need to watch.
	for bn := range bCache {
		if d.InterfaceCache[bn] == nil {
			inter, err := net.InterfaceByName(bn)
			if err != nil {
				return
			}
			d.InterfaceCache[bn] = inter
		}
	}
	//start loop.
	for {
		select {
		case <-d.timer.C:
			//when tick tok , compare it.
			d.Compare()
			//hung up goroutine. release cpu.
			runtime.Gosched()
		case update := <-d.Update:
			//received update signal
			if update {
				for bn := range bCache {
					ip, err := d.InterfaceCache[bn].Addrs()
					if err != nil {
						return
					}
					if len(ip) == 0 {
						return
					}
					d.CacheHash[bn] = string(d.InterfaceCache[bn].MTU)
					for i := range ip {
						d.CacheHash[bn] = d.CacheHash[bn] + ip[i].String()
					}
				}
				log.Info("IP Change!")
				CheckDeviceInfo()
			}
			//hung up goroutine. release cpu.
			runtime.Gosched()
		}
	}