private byte[] HandleTouch(string[] commandParams)
{
var key = _converters.ToKey(commandParams[0]);
var exptime = _converters.ToExpiry(commandParams[1]);
bool success = _cache.Touch(key, exptime);
return(success
? Encoding.ASCII.GetBytes("OK\r\n")
: Encoding.ASCII.GetBytes("NOT_FOUND\r\n"));
}