public bool TrySellItem(Part5_SalesPerson person, string item)
{
bool success = false;
int newStockLevel = _stock.AddOrUpdate(item,
(itemName) => { success = false; return(0); },
(itemName, oldValue) =>
{
if (oldValue == 0)
{
success = false;
return(0);
}
else
{
success = true;
return(oldValue - 1);
}
});
if (success)
{
Interlocked.Increment(ref _totalQuantitySold);
_toDoQueue.AddTrade(new Trade(person, 1));
}
return(success);
}
public bool TrySellItem2(Part5_SalesPerson person, string item)
{
int newStockLevel = _stock.AddOrUpdate(item, -1, (key, oldValue) => oldValue - 1);
if (newStockLevel < 0)
{
_stock.AddOrUpdate(item, 1, (key, oldValue) => oldValue + 1);
return(false);
}
else
{
Interlocked.Increment(ref _totalQuantitySold);
_toDoQueue.AddTrade(new Trade(person, 1));
return(true);
}
}
public Trade(Part5_SalesPerson person, int quantitySold)
{
this.Person = person;
this.QuantitySold = quantitySold;
}
public void BuyStock(Part5_SalesPerson person, string item, int quantity)
{
_stock.AddOrUpdate(item, quantity, (key, oldValue) => oldValue + quantity);
Interlocked.Add(ref _totalQuantityBought, quantity);
_toDoQueue.AddTrade(new Trade(person, -quantity));
}
