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