/
endpoint.go
68 lines (59 loc) · 2.09 KB
/
endpoint.go
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package endpoints
import (
"context"
"errors"
"time"
"github.com/go-kit/kit/circuitbreaker"
"github.com/go-kit/kit/endpoint"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/ratelimit"
"github.com/go-kit/kit/tracing/opentracing"
stdopentracing "github.com/opentracing/opentracing-go"
"github.com/pyihe/go-example/kit/internal/middleware"
"github.com/pyihe/go-example/kit/protocol"
"github.com/pyihe/go-example/kit/service"
"github.com/sony/gobreaker"
"golang.org/x/time/rate"
)
var (
ErrInvalidRequest = errors.New("invalid request")
)
type EndpointSet struct {
HelloEndpoint endpoint.Endpoint
VisitEndpoint endpoint.Endpoint
}
func NewEndpointSet(srv *service.Service, logger log.Logger, tracer stdopentracing.Tracer) EndpointSet {
var helloEndpoint = wrapEndpoint("Hello", makeHelloEndpoint(srv), logger, tracer)
var visitEndpoint = wrapEndpoint("Visit", makeVisitEndpoint(srv), logger, tracer)
return EndpointSet{
HelloEndpoint: helloEndpoint,
VisitEndpoint: visitEndpoint,
}
}
func wrapEndpoint(operationName string, ep endpoint.Endpoint, logger log.Logger, tracer stdopentracing.Tracer) endpoint.Endpoint {
ep = ratelimit.NewErroringLimiter(rate.NewLimiter(rate.Every(time.Second), 1))(ep)
ep = circuitbreaker.Gobreaker(gobreaker.NewCircuitBreaker(gobreaker.Settings{}))(ep)
ep = opentracing.TraceServer(tracer, operationName)(ep)
ep = middleware.LoggingMiddleware(logger)(ep)
return ep
}
func makeHelloEndpoint(s *service.Service) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (response interface{}, err error) {
req, ok := request.(*protocol.HelloRequest)
if req == nil || !ok {
return nil, ErrInvalidRequest
}
resp, err := s.Hello(req.GetName())
return &protocol.HelloResponse{Echo: resp}, err
}
}
func makeVisitEndpoint(s *service.Service) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (response interface{}, err error) {
req, ok := request.(*protocol.VisitRequest)
if req == nil || !ok {
return nil, ErrInvalidRequest
}
resp, err := s.Visit(req.Place)
return &protocol.VisitResponse{Echo: resp}, err
}
}