fix golint issues in core/breaker (#466)

core/breaker/breakers.go

@@ -7,24 +7,28 @@ var (
 	breakers = make(map[string]Breaker)
 )
 
+// Do calls Breaker.Do on the Breaker with given name.
 func Do(name string, req func() error) error {
 	return do(name, func(b Breaker) error {
 		return b.Do(req)
 	})
 }
 
+// DoWithAcceptable calls Breaker.DoWithAcceptable on the Breaker with given name.
 func DoWithAcceptable(name string, req func() error, acceptable Acceptable) error {
 	return do(name, func(b Breaker) error {
 		return b.DoWithAcceptable(req, acceptable)
 	})
 }
 
+// DoWithFallback calls Breaker.DoWithFallback on the Breaker with given name.
 func DoWithFallback(name string, req func() error, fallback func(err error) error) error {
 	return do(name, func(b Breaker) error {
 		return b.DoWithFallback(req, fallback)
 	})
 }
 
+// DoWithFallbackAcceptable calls Breaker.DoWithFallbackAcceptable on the Breaker with given name.
 func DoWithFallbackAcceptable(name string, req func() error, fallback func(err error) error,
 	acceptable Acceptable) error {
 	return do(name, func(b Breaker) error {
@@ -32,6 +36,7 @@ func DoWithFallbackAcceptable(name string, req func() error, fallback func(err e
 	})
 }
 
+// GetBreaker returns the Breaker with the given name.
 func GetBreaker(name string) Breaker {
 	lock.RLock()
 	b, ok := breakers[name]
@@ -51,7 +56,8 @@ func GetBreaker(name string) Breaker {
 	return b
 }
 
-func NoBreakFor(name string) {
+// NoBreakerFor disables the circuit breaker for the given name.
+func NoBreakerFor(name string) {
 	lock.Lock()
 	breakers[name] = newNoOpBreaker()
 	lock.Unlock()