| /* |
| * |
| * Copyright 2019 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| // Binary server is an example server. |
| package main |
| |
| import ( |
| "context" |
| "flag" |
| "fmt" |
| "log" |
| "net" |
| "time" |
| |
| "google.golang.org/grpc" |
| "google.golang.org/grpc/codes" |
| pb "google.golang.org/grpc/examples/features/proto/echo" |
| "google.golang.org/grpc/keepalive" |
| "google.golang.org/grpc/status" |
| ) |
| |
| var port = flag.Int("port", 50052, "port number") |
| |
| var kaep = keepalive.EnforcementPolicy{ |
| MinTime: 5 * time.Second, // If a client pings more than once every 5 seconds, terminate the connection |
| PermitWithoutStream: true, // Allow pings even when there are no active streams |
| } |
| |
| var kasp = keepalive.ServerParameters{ |
| MaxConnectionIdle: 15 * time.Second, // If a client is idle for 15 seconds, send a GOAWAY |
| MaxConnectionAge: 30 * time.Second, // If any connection is alive for more than 30 seconds, send a GOAWAY |
| MaxConnectionAgeGrace: 5 * time.Second, // Allow 5 seconds for pending RPCs to complete before forcibly closing connections |
| Time: 5 * time.Second, // Ping the client if it is idle for 5 seconds to ensure the connection is still active |
| Timeout: 1 * time.Second, // Wait 1 second for the ping ack before assuming the connection is dead |
| } |
| |
| // server implements EchoServer. |
| type server struct{} |
| |
| func (s *server) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) { |
| return &pb.EchoResponse{Message: req.Message}, nil |
| } |
| |
| func (s *server) ServerStreamingEcho(req *pb.EchoRequest, stream pb.Echo_ServerStreamingEchoServer) error { |
| return status.Error(codes.Unimplemented, "RPC unimplemented") |
| } |
| |
| func (s *server) ClientStreamingEcho(stream pb.Echo_ClientStreamingEchoServer) error { |
| return status.Error(codes.Unimplemented, "RPC unimplemented") |
| } |
| |
| func (s *server) BidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error { |
| return status.Error(codes.Unimplemented, "RPC unimplemented") |
| } |
| |
| func main() { |
| flag.Parse() |
| |
| address := fmt.Sprintf(":%v", *port) |
| lis, err := net.Listen("tcp", address) |
| if err != nil { |
| log.Fatalf("failed to listen: %v", err) |
| } |
| |
| s := grpc.NewServer(grpc.KeepaliveEnforcementPolicy(kaep), grpc.KeepaliveParams(kasp)) |
| pb.RegisterEchoServer(s, &server{}) |
| |
| if err := s.Serve(lis); err != nil { |
| log.Fatalf("failed to serve: %v", err) |
| } |
| } |