//Method to execute the transfer transaction
override public void Execute()
{
base.Execute();
//throwing exception if already executed
if (_executed)
{
throw new InvalidOperationException("The transfer transaction has been already attempted");
}
_executed = true;
//withdrawing the amount from _fromAccount first
_withdraw.Execute();
//if amount is withdrawn successfully
if (_withdraw.Success)
{
//Depositing the amount to _toAccount
_deposit.Execute();
//if deposit is not succesfull, then rollback the withdraw
if (!_deposit.Success)
{
_withdraw.Rollback();
}
}
}
