initial import

core/breaker/nopbreaker.go

@@ -0,0 +1,42 @@
+package breaker
+
+const noOpBreakerName = "nopBreaker"
+
+type noOpBreaker struct{}
+
+func newNoOpBreaker() Breaker {
+	return noOpBreaker{}
+}
+
+func (b noOpBreaker) Name() string {
+	return noOpBreakerName
+}
+
+func (b noOpBreaker) Allow() (Promise, error) {
+	return nopPromise{}, nil
+}
+
+func (b noOpBreaker) Do(req func() error) error {
+	return req()
+}
+
+func (b noOpBreaker) DoWithAcceptable(req func() error, acceptable Acceptable) error {
+	return req()
+}
+
+func (b noOpBreaker) DoWithFallback(req func() error, fallback func(err error) error) error {
+	return req()
+}
+
+func (b noOpBreaker) DoWithFallbackAcceptable(req func() error, fallback func(err error) error,
+	acceptable Acceptable) error {
+	return req()
+}
+
+type nopPromise struct{}
+
+func (p nopPromise) Accept() {
+}
+
+func (p nopPromise) Reject(reason string) {
+}