case SEEK:
final DFSPayloads.SeekFile seekPayload = (DFSPayloads.SeekFile) message.payload;
token = seekPayload.getToken();
driver = drivers.get(seekPayload.getFileHandler());
result = driver.seek(seekPayload.getPosition());
sendResult(session, token, FileHandlerOperantions.SEEK, result);
break;
case CLOSE:
final DFSPayloads.CloseFile closePayload = (DFSPayloads.CloseFile) message.payload;