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

Fixes #52

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

@@ -0,0 +1,31 @@
+package circuitbreaker
+
+import (
+	"context"
+
+	"github.com/afex/hystrix-go/hystrix"
+
+	"github.com/go-kit/kit/endpoint"
+)
+
+// Hystrix returns an endpoint.Middleware that implements the circuit
+// breaker pattern using the afex/hystrix-go package.
+//
+// When using this circuit breaker, please configure your commands separately.
+//
+// See https://godoc.org/github.com/afex/hystrix-go/hystrix for more
+// information.
+func Hystrix(commandName string) endpoint.Middleware {
+	return func(next endpoint.Endpoint) endpoint.Endpoint {
+		return func(ctx context.Context, request interface{}) (response interface{}, err error) {
+			var resp interface{}
+			if err := hystrix.Do(commandName, func() (err error) {
+				resp, err = next(ctx, request)
+				return err
+			}, nil); err != nil {
+				return nil, err
+			}
+			return resp, nil
+		}
+	}
+}