// 有返回值RPC CALL
public async Task <IMessage> CallAsync(Head request)
{
CallRWStream stream = new CallRWStream();
Streams.Add(stream.StreamId, stream);
return(await stream.StreamWrightAsync(request, this));
}
// 有返回值RPC CALL，可以取消
public async Task <IMessage> CallAsync(Head request, CancellationToken cancellationToken)
{
CallRWStream stream = new CallRWStream();
Streams.Add(stream.StreamId, stream);
cancellationToken.Register(() => this.Streams.Remove(stream.StreamId));
Send(request);
return(await stream.StreamWrightAsync(request, this));
}