sre

const (
	// StateOpen when circuit breaker open, request not allowed, after sleep
	// some duration, allow one single request for testing the health, if ok
	// then state reset to closed, if not continue the step.
	StateOpen int32 = iota
	// StateClosed when circuit breaker closed, request allowed, the breaker
	// calc to succeed ratio, if request num greater request setting and
	// ratio lower than the setting ratio, then reset state to open.
	StateClosed
)