-
Notifications
You must be signed in to change notification settings - Fork 68
/
grpc.go
87 lines (75 loc) · 2.43 KB
/
grpc.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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
package main
import (
"context"
"log"
"net"
"net/url"
"sync"
sommelierpb "goa.design/examples/cellar/gen/grpc/sommelier/pb"
sommeliersvr "goa.design/examples/cellar/gen/grpc/sommelier/server"
storagepb "goa.design/examples/cellar/gen/grpc/storage/pb"
storagesvr "goa.design/examples/cellar/gen/grpc/storage/server"
sommelier "goa.design/examples/cellar/gen/sommelier"
storage "goa.design/examples/cellar/gen/storage"
grpcmdlwr "goa.design/goa/v3/grpc/middleware"
"goa.design/goa/v3/middleware"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
)
// handleGRPCServer starts configures and starts a gRPC server on the given
// URL. It shuts down the server if any error is received in the error channel.
func handleGRPCServer(ctx context.Context, u *url.URL, sommelierEndpoints *sommelier.Endpoints, storageEndpoints *storage.Endpoints, wg *sync.WaitGroup, errc chan error, logger *log.Logger, debug bool) {
// Setup goa log adapter.
var (
adapter middleware.Logger
)
{
adapter = middleware.NewLogger(logger)
}
// Wrap the endpoints with the transport specific layers. The generated
// server packages contains code generated from the design which maps
// the service input and output data structures to gRPC requests and
// responses.
var (
sommelierServer *sommeliersvr.Server
storageServer *storagesvr.Server
)
{
sommelierServer = sommeliersvr.New(sommelierEndpoints, nil)
storageServer = storagesvr.New(storageEndpoints, nil)
}
// Initialize gRPC server with the middleware.
srv := grpc.NewServer(
grpc.ChainUnaryInterceptor(
grpcmdlwr.UnaryRequestID(),
grpcmdlwr.UnaryServerLog(adapter),
),
)
// Register the servers.
sommelierpb.RegisterSommelierServer(srv, sommelierServer)
storagepb.RegisterStorageServer(srv, storageServer)
for svc, info := range srv.GetServiceInfo() {
for _, m := range info.Methods {
logger.Printf("serving gRPC method %s", svc+"/"+m.Name)
}
}
// Register the server reflection service on the server.
// See https://grpc.github.io/grpc/core/md_doc_server-reflection.html.
reflection.Register(srv)
(*wg).Add(1)
go func() {
defer (*wg).Done()
// Start gRPC server in a separate goroutine.
go func() {
lis, err := net.Listen("tcp", u.Host)
if err != nil {
errc <- err
}
logger.Printf("gRPC server listening on %q", u.Host)
errc <- srv.Serve(lis)
}()
<-ctx.Done()
logger.Printf("shutting down gRPC server at %q", u.Host)
srv.Stop()
}()
}