public TicketOrder getOneItem()
{
_readSemaphores.WaitOne();
TicketOrder retrievedOrder = new TicketOrder(0, 0, "not a valid order", 0);
lock (this)
{
while (_numberOfOrders <= 0) // wait for an order to an order to appear
{
Monitor.Wait(this);
}
for (int i = 0; i < MaxNumberOfOrders; i++)
{
if (orderBuffer[i].Id != "empty") // make sure the order is not empty
{
retrievedOrder = orderBuffer[i];
orderBuffer[i] = new TicketOrder(0, 0, "empty", 0);
_numberOfOrders--;
break;
}
}
_readSemaphores.Release();
Monitor.Pulse(this);
}
return(retrievedOrder);
}
public void setOneItem(TicketOrder newOrder)
{
_writeSemaphores.WaitOne();
lock (this)
{
while (_numberOfOrders >= MaxNumberOfOrders) // thread waits for buffer to have an empty spot fill before processing orders
{
Monitor.Wait(this);
}
for (int i = 0; i < MaxNumberOfOrders; i++)
{
if (orderBuffer[i].Id == "empty") // do not overwrite existing order
{
orderBuffer[i] = newOrder;
_numberOfOrders++;
break;
}
}
_writeSemaphores.Release();
Monitor.Pulse(this);
}
}
private void InitiateBuffer()
{
for (int i = 0; i < MaxNumberOfOrders; i++)
{
orderBuffer[i] = new TicketOrder(0, 0, "empty", 0); // set all values to "empty"
}
}
private void NewOrder(string id, int price, bool isSale)
{
int cardNumber = Rand.Next(5000, 7000);
int numberOfTicketsRequested = CalculateNumberOfTicketsToBuy(); // (2)
TicketOrder newOrder = new TicketOrder(numberOfTicketsRequested, cardNumber, id, price);
newOrder.Sent = DateTime.Now;
Console.WriteLine($"Ticket Agency {id} has ordered {numberOfTicketsRequested} tickets, at {newOrder.Sent}.");
Program.TicketOrderBuffer.setOneItem(newOrder); // (3) Sends order to buffer
CreateOrderEvent?.Invoke(); // Lets Theme park know an order was created
}
public static bool ProcessOrder(TicketOrder myOrder, int price)
{
if (CheckCardNumberIsValid(myOrder.CardNumber)) // (6)
{
int amountPlusTaxAndFees = CalculateTotalAfterTaxAndFees(price, myOrder.NumberOfTickets, 25); //(6)
if (RemoveTicketsFromParkInventory(myOrder.NumberOfTickets))
{
SendOrderConfirmation(myOrder, price, amountPlusTaxAndFees); // (7)
PrintOrder(myOrder, price, amountPlusTaxAndFees);
}
else
{
PrintCancelOrder(myOrder, price, amountPlusTaxAndFees);
}
return(true);
}
else
{
Console.WriteLine($"The card number {myOrder.CardNumber} is not valid, the order for {myOrder.Id} is cancelled.");
return(false);
}
}
public void OrderHasBeenProcessed(TicketOrder myOrder, int price, int amountPlusTax) //(7)
{
myOrder.Confirmed = DateTime.Now;
myOrder.TotalTime = myOrder.Confirmed - myOrder.Sent;
Console.WriteLine($"{myOrder.Id} has received confirmation at {myOrder.Confirmed:t} order took {myOrder.TotalTime.TotalMilliseconds} Milliseconds to process:\nOrder has been processed, with a ticket Price of ${price} for {myOrder.NumberOfTickets} tickets. The total of the transaction was ${amountPlusTax}.");
}
private static void PrintOrder(TicketOrder myOrder, int price, int totalAmount)
{
Console.WriteLine($"Order Process Thread Printed Order: \n{myOrder.Id} order has been place for {myOrder.NumberOfTickets} tickets at a Price of ${price} amount after tax and fees is ${totalAmount}.");// (7)
}
private static void SendOrderConfirmation(TicketOrder myOrder, int price, int totalAmount)
{
ProcessedOrderEvent?.Invoke(myOrder, price, totalAmount);
}
private static void PrintCancelOrder(TicketOrder myOrder, int price, int totalAmount)
{
Console.WriteLine($"{myOrder.Id} ORDER CANCELLED:\nNot enough tickets available at time of purchase!");
}