/
grpc.go
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/
grpc.go
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package kafka_grpctransport
import (
"fmt"
grpctransport "github.com/go-kit/kit/transport/grpc"
context "golang.org/x/net/context"
endpoints "github.com/moul/kafka-gateway/gen/endpoints"
pb "github.com/moul/kafka-gateway/gen/pb"
)
// avoid import errors
var _ = fmt.Errorf
func MakeGRPCServer(ctx context.Context, endpoints endpoints.Endpoints) pb.KafkaServiceServer {
var options []grpctransport.ServerOption
_ = options
return &grpcServer{
consumer: grpctransport.NewServer(
ctx,
endpoints.ConsumerEndpoint,
decodeRequest,
encodeConsumerResponse,
options...,
),
producer: grpctransport.NewServer(
ctx,
endpoints.ProducerEndpoint,
decodeRequest,
encodeProducerResponse,
options...,
),
consumerstream: &server{
e: endpoints.ConsumerStreamEndpoint,
},
}
}
type grpcServer struct {
consumer grpctransport.Handler
producer grpctransport.Handler
consumerstream streamHandler
}
func (s *grpcServer) Consumer(ctx context.Context, req *pb.ConsumerRequest) (*pb.ConsumerResponse, error) {
_, rep, err := s.consumer.ServeGRPC(ctx, req)
if err != nil {
return nil, err
}
return rep.(*pb.ConsumerResponse), nil
}
func encodeConsumerResponse(ctx context.Context, response interface{}) (interface{}, error) {
resp := response.(*pb.ConsumerResponse)
return resp, nil
}
func (s *grpcServer) Producer(ctx context.Context, req *pb.ProducerRequest) (*pb.ProducerResponse, error) {
_, rep, err := s.producer.ServeGRPC(ctx, req)
if err != nil {
return nil, err
}
return rep.(*pb.ProducerResponse), nil
}
func encodeProducerResponse(ctx context.Context, response interface{}) (interface{}, error) {
resp := response.(*pb.ProducerResponse)
return resp, nil
}
func (s *grpcServer) ConsumerStream(req *pb.ConsumerStreamRequest, server pb.KafkaService_ConsumerStreamServer) error {
return s.consumerstream.Do(server, req)
}
func decodeRequest(ctx context.Context, grpcReq interface{}) (interface{}, error) {
return grpcReq, nil
}
type streamHandler interface {
Do(server interface{}, req interface{}) (err error)
}
type server struct {
e endpoints.StreamEndpoint
}
func (s server) Do(server interface{}, req interface{}) (err error) {
if err := s.e(server, req); err != nil {
return err
}
return nil
}