/
function_server.go
65 lines (58 loc) · 1.51 KB
/
function_server.go
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package openedge
import (
fmt "fmt"
"net"
"github.com/baidu/openedge/utils"
context "golang.org/x/net/context"
grpc "google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/reflection"
)
// Call message handler
type Call func(context.Context, *FunctionMessage) (*FunctionMessage, error)
// FServer functions server to handle message
type FServer struct {
addr string
cfg FunctionServerConfig
svr *grpc.Server
call Call
}
// NewFServer creates a new functions server
func NewFServer(c FunctionServerConfig, call Call) (*FServer, error) {
lis, err := net.Listen("tcp", c.Address)
if err != nil {
return nil, err
}
// TODO: to test
tls, err := utils.NewTLSServerConfig(c.Certificate)
if err != nil {
return nil, err
}
opts := []grpc.ServerOption{
grpc.MaxConcurrentStreams(c.Concurrent.Max),
grpc.MaxRecvMsgSize(int(c.Message.Length.Max)),
grpc.MaxSendMsgSize(int(c.Message.Length.Max)),
}
if tls != nil {
opts = append(opts, grpc.Creds(credentials.NewTLS(tls)))
}
svr := grpc.NewServer(opts...)
s := &FServer{cfg: c, call: call, svr: svr, addr: lis.Addr().String()}
RegisterFunctionServer(svr, s)
reflection.Register(svr)
go s.svr.Serve(lis)
return s, nil
}
// Call handles message
func (s *FServer) Call(c context.Context, m *FunctionMessage) (*FunctionMessage, error) {
if s.call == nil {
return nil, fmt.Errorf("handle not implemented")
}
return s.call(c, m)
}
// Close closes server
func (s *FServer) Close() {
if s.svr != nil {
s.svr.GracefulStop()
}
}