public string ServeCustomer(StockController_WithConcurrent controller)
{
Thread.Sleep(Rnd.NextInt(5));
TShirt shirt = TShirtProvider.SelectRandomShirt();
string code = shirt.Code;
//assuming customer will always buy/sell a shirt
bool custSells = Rnd.TrueWithProb(1.0 / 6.0); //customer want to sell a shirt 1/6th of the time
if (custSells)
{
int quantity = Rnd.NextInt(9) + 1;
controller.BuyShirts(code, quantity);
return($"Bought {quantity} of {shirt}");
}
else
{
bool success = controller.TrySellShirt(code);
if (success)
{
return($"Sold {shirt}");
}
else
{
return($"Couldn't sell {shirt}: Out of stock");
}
}
}
public static void Run()
{
//StockController controller = new StockController();
//TimeSpan workDay = new TimeSpan(0, 0, 0, 0, 500);
//new SalesPerson("Jack").Work(workDay, controller);
//new SalesPerson("Anna").Work(workDay, controller);
//new SalesPerson("Bond").Work(workDay, controller);
//controller.DisplayStock();
StockController_WithConcurrent controller = new StockController_WithConcurrent();
TimeSpan workDay = new TimeSpan(0, 0, 0, 0, 500);
Task task1 = Task.Run(() => new SalesPerson_Concurrent("Jack").Work(workDay, controller));
Task task2 = Task.Run(() => new SalesPerson_Concurrent("Anna").Work(workDay, controller));
Task task3 = Task.Run(() => new SalesPerson_Concurrent("Bond").Work(workDay, controller));
Task task4 = Task.Run(() => new SalesPerson_Concurrent("Kim").Work(workDay, controller));
Task.WaitAll(task1, task2, task3, task4);
controller.DisplayStock();
//---------CONCURRENT DICTIONARY METHODS------------
// AddOrUpdate() | GetOrAdd()
// Solution for updating | solution for reading
//Guarenteed to succeed | Guarenteed to succeed
//Add item if not already there | Adds the item if it's not there
}
public void Work(TimeSpan workDay, StockController_WithConcurrent controller)
{
DateTime start = DateTime.Now;
while (DateTime.Now - start < workDay)
{
string msg = ServeCustomer(controller);
if (msg != null)
{
Console.WriteLine($"{Name}: {msg}");
}
}
}