sys

func GetBoolEnv ¶

func GetBoolEnv(key string, fallback bool) bool

GetBoolEnv parses a boolean environment variable by the given key, if env is empty, returns the given fallback value

func GetDurationEnv ¶

func GetDurationEnv(key string, fallback time.Duration) time.Duration

GetDurationEnv parses a duration environment variable by the given key, if env is empty, returns the given fallback value

func GetStringEnv ¶

func GetStringEnv(key, fallback string) string

GetStringEnv returns an environment variable by the given key, if env is empty, returns the given fallback value

func RegisterInterruptHandler ¶

func RegisterInterruptHandler(cancelApp context.CancelFunc, eventFn func())

RegisterInterruptHandler registers a handler of interrupt signals from the OS. When signal os.Interrupt is coming, it informs the user about it and calls func `cancelApp`.

func RegisterSignalHandler ¶

func RegisterSignalHandler(cancel context.CancelFunc, sigs ...os.Signal)

RegisterSignalHandler registers a handler of signals from the OS. Before using it you have to ensure a exit from each loop when <-ctx.Done() is releasing Example:

func HelloWorld(ctx context.Context) {
	for {
		select {
		case <-ctx.Done():
			return
		default:
		}
		.....
	}
}