protoc-gen-go-micro/vendor/github.com/go-kit/kit/circuitbreaker/gobreaker.go

package circuitbreaker

import (
	"github.com/sony/gobreaker"
	"golang.org/x/net/context"

	"github.com/go-kit/kit/endpoint"
)

// Gobreaker returns an endpoint.Middleware that implements the circuit
// breaker pattern using the sony/gobreaker package. Only errors returned by
// the wrapped endpoint count against the circuit breaker's error count.
//
// See http://godoc.org/github.com/sony/gobreaker for more information.
func Gobreaker(cb *gobreaker.CircuitBreaker) endpoint.Middleware {
	return func(next endpoint.Endpoint) endpoint.Endpoint {
		return func(ctx context.Context, request interface{}) (interface{}, error) {
			return cb.Execute(func() (interface{}, error) { return next(ctx, request) })
		}
	}
}