private void ParseCommand(ref ReadOnlySequence <byte> buffer)
{
if (_clientManager.SupportAcknowledgement)
{
ReadAcknowledgement(ref buffer);
}
short cmdType = 0;
if (_clientManager.ClientVersion >= 5000)
{
var cmdTypeBuffer = buffer.Slice(0, 2);
if (cmdTypeBuffer.First.Span.Length >= 2)
{
cmdType = HelperFxn.ConvertToShort(cmdTypeBuffer.First.Span);
}
else
{
cmdType = HelperFxn.ConvertToShort(cmdTypeBuffer.ToArray());
}
buffer = buffer.Slice(2, buffer.End);
}
var commandLengthBuffer = buffer.Slice(0, _headerLength);
var cmdLength = RequestDeserializer.ToInt32(commandLengthBuffer.ToArray(), 0, _headerLength);
buffer = buffer.Slice(_headerLength, buffer.End);
var commandBuffer = buffer.Slice(0, cmdLength);
object command = null;
using (var stream = new MemoryStream(commandBuffer.ToArray()))
command = RequestDeserializer.Deserialize(cmdType, stream);
buffer = buffer.Slice(cmdLength, buffer.End);
if (CommandHelper.IsBasicCRUDOperation((Common.Protobuf.Command.Type)cmdType))
{
_cmdManager.ProcessCommand(_clientManager, command, cmdType, _acknowledgementId, null, buffer.Length > 0);
}
else
{
//Due to response pipelining, old responses of basic CRUD operations are queued for sending
//therefore before executing this long running command, we should send those responses
_clientManager.SendPendingResponses(true);
ThreadPool.QueueUserWorkItem(new WaitCallback(ProcessCommandAsync), new LongRunningCommand()
{
Command = command, CommandType = cmdType, AcknowledgementId = _acknowledgementId
});
}
_expectedLength = null;
_acknowledgementId = -1;
}
private bool ReadHeader(ref ReadOnlySequence <byte> buffer)
{
if (buffer.Length >= _headerLength)
{
_expectedLength = RequestDeserializer.ToInt32(buffer.Slice(0, _headerLength).ToArray(), 0, _headerLength);
buffer = buffer.Slice(_headerLength, buffer.End);
return(true);
}
return(false);
}