Moved to google.golang.org/genproto/googleapis/api/annotations

Fixes #52

vendor/github.com/go-kit/kit/circuitbreaker/handy_breaker.go

@@ -0,0 +1,38 @@
+package circuitbreaker
+
+import (
+	"context"
+	"time"
+
+	"github.com/streadway/handy/breaker"
+
+	"github.com/go-kit/kit/endpoint"
+)
+
+// HandyBreaker returns an endpoint.Middleware that implements the circuit
+// breaker pattern using the streadway/handy/breaker package. Only errors
+// returned by the wrapped endpoint count against the circuit breaker's error
+// count.
+//
+// See http://godoc.org/github.com/streadway/handy/breaker for more
+// information.
+func HandyBreaker(cb breaker.Breaker) endpoint.Middleware {
+	return func(next endpoint.Endpoint) endpoint.Endpoint {
+		return func(ctx context.Context, request interface{}) (response interface{}, err error) {
+			if !cb.Allow() {
+				return nil, breaker.ErrCircuitOpen
+			}
+
+			defer func(begin time.Time) {
+				if err == nil {
+					cb.Success(time.Since(begin))
+				} else {
+					cb.Failure(time.Since(begin))
+				}
+			}(time.Now())
+
+			response, err = next(ctx, request)
+			return
+		}
+	}
+}