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68 lines
1.6 KiB
68 lines
1.6 KiB
package downloader
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import (
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"context"
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"log"
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"net"
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pb "github.com/harmony-one/harmony/api/service/syncing/downloader/proto"
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"github.com/harmony-one/harmony/internal/utils"
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"google.golang.org/grpc"
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"google.golang.org/grpc/peer"
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)
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// Constants for downloader server.
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const (
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DefaultDownloadPort = "6666"
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)
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// Server is the Server struct for downloader package.
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type Server struct {
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downloadInterface DownloadInterface
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GrpcServer *grpc.Server
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}
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// Query returns the feature at the given point.
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func (s *Server) Query(ctx context.Context, request *pb.DownloaderRequest) (*pb.DownloaderResponse, error) {
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var pinfo string
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// retrieve ip/port information; used for debug only
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p, ok := peer.FromContext(ctx)
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if !ok {
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pinfo = ""
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} else {
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pinfo = p.Addr.String()
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}
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response, err := s.downloadInterface.CalculateResponse(request, pinfo)
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if err != nil {
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return nil, err
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}
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return response, nil
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}
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// Start starts the Server on given ip and port.
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func (s *Server) Start(ip, port string) (*grpc.Server, error) {
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addr := net.JoinHostPort("", port)
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lis, err := net.Listen("tcp4", addr)
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if err != nil {
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log.Fatalf("[SYNC] failed to listen: %v", err)
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}
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var opts []grpc.ServerOption
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grpcServer := grpc.NewServer(opts...)
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pb.RegisterDownloaderServer(grpcServer, s)
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go func() {
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if err := grpcServer.Serve(lis); err != nil {
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utils.Logger().Warn().Err(err).Msg("[SYNC] (*grpc.Server).Serve failed")
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}
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}()
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s.GrpcServer = grpcServer
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return grpcServer, nil
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}
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// NewServer creates new Server which implements DownloadInterface.
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func NewServer(dlInterface DownloadInterface) *Server {
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s := &Server{downloadInterface: dlInterface}
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return s
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}
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