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package main
import (
"context"
"fmt"
"log"
"net"
flatbuffers "github.com/google/flatbuffers/go"
models "github.com/google/flatbuffers/grpc/examples/go/greeter/models"
"google.golang.org/grpc"
)
var (
greetings = [...]string{"Hi", "Hallo", "Ciao"}
)
type greeterServer struct {
models.UnimplementedGreeterServer
}
func (s *greeterServer) SayHello(ctx context.Context, request *models.HelloRequest) (*flatbuffers.Builder, error) {
v := request.Name()
var m string
if v == nil {
m = "Unknown"
} else {
m = string(v)
}
b := flatbuffers.NewBuilder(0)
idx := b.CreateString("welcome " + m)
models.HelloReplyStart(b)
models.HelloReplyAddMessage(b, idx)
b.Finish(models.HelloReplyEnd(b))
return b, nil
}
func (s *greeterServer) SayManyHellos(request *models.HelloRequest, stream models.Greeter_SayManyHellosServer) error {
v := request.Name()
var m string
if v == nil {
m = "Unknown"
} else {
m = string(v)
}
b := flatbuffers.NewBuilder(0)
for _, greeting := range greetings {
idx := b.CreateString(greeting + " " + m)
models.HelloReplyStart(b)
models.HelloReplyAddMessage(b, idx)
b.Finish(models.HelloReplyEnd(b))
if err := stream.Send(b); err != nil {
return err
}
}
return nil
}
func newServer() *greeterServer {
s := &greeterServer{}
return s
}
func main() {
lis, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", 3000))
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
codec := &flatbuffers.FlatbuffersCodec{}
grpcServer := grpc.NewServer(grpc.ForceServerCodec(codec))
models.RegisterGreeterServer(grpcServer, newServer())
if err := grpcServer.Serve(lis); err != nil {
fmt.Print(err)
panic(err)
}
}
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