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voice_service_grpc.go
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voice_service_grpc.go
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// voice_service_grpc.go handles communication between tum-live and voice-service
package api
import (
"context"
"fmt"
"net"
"time"
"github.com/TUM-Dev/gocast/dao"
"github.com/TUM-Dev/gocast/model"
"github.com/TUM-Dev/gocast/tools"
"github.com/TUM-Dev/gocast/voice-service/pb"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/reflection"
"google.golang.org/protobuf/types/known/emptypb"
)
type subtitleReceiverServer struct {
pb.UnimplementedSubtitleReceiverServer
dao.DaoWrapper
}
func (s subtitleReceiverServer) Receive(_ context.Context, request *pb.ReceiveRequest) (*emptypb.Empty, error) {
subtitlesEntry := model.Subtitles{
StreamID: uint(request.GetStreamId()),
Content: request.GetSubtitles(),
Language: request.GetLanguage(),
}
err := s.SubtitlesDao.CreateOrUpsert(context.Background(), &subtitlesEntry)
if err != nil {
return nil, err
}
return &emptypb.Empty{}, nil
}
func init() {
logger.Info("starting grpc voice-receiver")
lis, err := net.Listen("tcp", ":50053")
if err != nil {
logger.Error("failed to init voice-receiver server", "err", err)
return
}
grpcServer := grpc.NewServer(grpc.KeepaliveParams(keepalive.ServerParameters{
MaxConnectionIdle: time.Minute,
MaxConnectionAge: time.Minute,
MaxConnectionAgeGrace: time.Second * 5,
Time: time.Minute * 10,
Timeout: time.Second * 20,
}))
pb.RegisterSubtitleReceiverServer(grpcServer, &subtitleReceiverServer{DaoWrapper: dao.NewDaoWrapper()})
reflection.Register(grpcServer)
go func() {
if err := grpcServer.Serve(lis); err != nil {
logger.Error("failed to serve", "err", err)
}
}()
}
type SubtitleGeneratorClient struct {
pb.SubtitleGeneratorClient
*grpc.ClientConn
}
func GetSubtitleGeneratorClient() (SubtitleGeneratorClient, error) {
voiceAddr := fmt.Sprintf("%s:%s", tools.Cfg.VoiceService.Host, tools.Cfg.VoiceService.Port)
conn, err := grpc.Dial(voiceAddr, grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
return SubtitleGeneratorClient{}, err
}
return SubtitleGeneratorClient{pb.NewSubtitleGeneratorClient(conn), conn}, nil
}
func (s SubtitleGeneratorClient) CloseConn() {
err := s.ClientConn.Close()
if err != nil {
logger.Error("could not close voice-service connection", "err", err)
}
}