circuit_main.go

func fetchWeather(location string) string {
	time.Sleep(time.Duration(rand.Intn(10)) * time.Second)
	return "sunny"
}

func fallbackWeather() string {
	return "raining"
}

func main() {
	fuse := &Circuit{
		TimeOut:        3,
		FailThreshold:  5,
		RetryThreshold: 5,
	}

	var localWeather string

	for {
		fuse.WithCircuit(func() error {
			localWeather = fetchWeather("London")
			return nil
		},
			func() {
				localWeather = fallbackWeather()
			})

		fmt.Println(localWeather)
	}
}