/
main.go
70 lines (61 loc) · 1.56 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
/*
*
* Copyright 2018 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"
"fmt"
"log"
"net"
"sync"
"google.golang.org/grpc"
pb "google.golang.org/grpc/examples/features/proto/echo"
)
var (
addrs = []string{":50051", ":50052"}
)
type ecServer struct {
pb.UnimplementedEchoServer
addr string
}
func (s *ecServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
return &pb.EchoResponse{Message: fmt.Sprintf("%s (from %s)", req.Message, s.addr)}, nil
}
func startServer(addr string) {
lis, err := net.Listen("tcp", addr)
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
s := grpc.NewServer()
pb.RegisterEchoServer(s, &ecServer{addr: addr})
log.Printf("serving on %s\n", addr)
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: %v", err)
}
}
func main() {
var wg sync.WaitGroup
for _, addr := range addrs {
wg.Add(1)
go func(addr string) {
defer wg.Done()
startServer(addr)
}(addr)
}
wg.Wait()
}