frostfs-node/pkg/services/util/response/client_stream.go

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package response
import (
"fmt"
"github.com/nspcc-dev/neofs-node/pkg/services/util"
)
// ClientMessageStreamer represents client-side message streamer
// that sets meta values to the response.
type ClientMessageStreamer struct {
cfg *cfg
send util.RequestMessageWriter
close util.ClientStreamCloser
}
// Recv calls send method of internal streamer.
func (s *ClientMessageStreamer) Send(req interface{}) error {
if err := s.send(req); err != nil {
return fmt.Errorf("(%T) could not send the request: %w", s, err)
}
return nil
}
// CloseAndRecv closes internal stream, receivers the response,
// sets meta values and returns the result.
func (s *ClientMessageStreamer) CloseAndRecv() (util.ResponseMessage, error) {
resp, err := s.close()
if err != nil {
return nil, fmt.Errorf("(%T) could not close stream and receive response: %w", s, err)
}
setMeta(resp, s.cfg)
return resp, nil
}
// CreateRequestStreamer wraps stream methods and returns ClientMessageStreamer instance.
func (s *Service) CreateRequestStreamer(sender util.RequestMessageWriter, closer util.ClientStreamCloser) *ClientMessageStreamer {
return &ClientMessageStreamer{
cfg: s.cfg,
send: sender,
close: closer,
}
}