result

type Result interface {
	// WaitInit wait for the program to finish initialization work
	WaitInit() error
	// Wait wait for the program exit
	Wait() error
	// Notify send a signal to the program
	Notify(s os.Signal) error
	// Shutdown shutdown the program
	Shutdown() error
	// InitDone mark the initialization work as finished
	InitDone()
	// InitDoneWithError mark the initialization work as failed
	InitDoneWithError(err error)
	// Done mark the work as finished
	Done()
	// DoneWithError mark the work as failed
	DoneWithError(err error)
	// RegisterNotifyHandler register a signal handler
	RegisterNotifyHandler(ns signal.NotifySignal)
}