public void HandleCalculateMessage(CalculateMessage message)
        {
            var amount = _calculator.Calculate(_positions, _pricing);

            if (message.Flush)
            {
                _positions = 0;
            }

            Sender.Tell(amount, Self);
        }
 public void HandleCalculateMessage(CalculateMessage message)
 {
     Context.System.EventStream.Publish(10);
     Sender.Tell(10, Self);
 }