[#2] rpc/client: Remove additional wrapper

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

rpc/grpc/init.go

@@ -1,96 +1,4 @@
 package grpc
 
-import (
-	"context"
-	"io"
-	"time"
-
-	"github.com/TrueCloudLab/frostfs-api-go/v2/rpc/common"
-	"google.golang.org/grpc"
-)
-
 // Message represents raw gRPC message.
 type Message interface{}
-
-// MessageReadWriter is a component interface
-// for transmitting raw messages over gRPC protocol.
-type MessageReadWriter interface {
-	// ReadMessage reads the next message from the remote server,
-	// and writes it to the argument.
-	ReadMessage(Message) error
-
-	// WriteMessage sends message from argument to remote server.
-	WriteMessage(Message) error
-
-	// Closes the communication session with the remote server.
-	//
-	// All calls to send/receive messages must be done before closing.
-	io.Closer
-}
-
-type streamWrapper struct {
-	grpc.ClientStream
-	timeout time.Duration
-	cancel  context.CancelFunc
-}
-
-func (w streamWrapper) ReadMessage(m Message) error {
-	return w.withTimeout(func() error {
-		return w.ClientStream.RecvMsg(m)
-	})
-}
-
-func (w streamWrapper) WriteMessage(m Message) error {
-	return w.withTimeout(func() error {
-		return w.ClientStream.SendMsg(m)
-	})
-}
-
-func (w *streamWrapper) Close() error {
-	return w.withTimeout(w.ClientStream.CloseSend)
-}
-
-func (w *streamWrapper) withTimeout(closure func() error) error {
-	ch := make(chan error, 1)
-	go func() {
-		ch <- closure()
-		close(ch)
-	}()
-
-	tt := time.NewTimer(w.timeout)
-
-	select {
-	case err := <-ch:
-		tt.Stop()
-		return err
-	case <-tt.C:
-		w.cancel()
-		return context.DeadlineExceeded
-	}
-}
-
-// Init initiates a messaging session within the RPC configured by options.
-func (c *Client) Init(info common.CallMethodInfo, opts ...CallOption) (MessageReadWriter, error) {
-	prm := defaultCallParameters()
-
-	for _, opt := range opts {
-		opt(prm)
-	}
-
-	ctx, cancel := context.WithCancel(prm.ctx)
-	stream, err := c.con.NewStream(ctx, &grpc.StreamDesc{
-		StreamName:    info.Name,
-		ServerStreams: info.ServerStream(),
-		ClientStreams: info.ClientStream(),
-	}, toMethodName(info))
-	if err != nil {
-		cancel()
-		return nil, err
-	}
-
-	return &streamWrapper{
-		ClientStream: stream,
-		cancel:       cancel,
-		timeout:      c.rwTimeout,
-	}, nil
-}