private void LeaveEvent(Customer customer)
{
// generates a random interval for how long the person takes, with a minimum of 1 minute
// and 30 seconds
TimeSpan waiting = new TimeSpan(0, 0, (int)(120 + Negex(AvgCheckoutTime.TotalSeconds - 120)));
// Creates departure event based on the time interval plus the time we are currently
// at in the Priority Queue
Event e = new Event(EVENTTYPE.LEAVE, ((EventPriorityQueue.Peek().Time + waiting)));
//Associates departure event with registrant
e.CurrCustomer = customer;
customer.Leave = e;
// Adds departure event to the queue
EventPriorityQueue.Enqueue(e);
// Update wait times for statistic counters
TotalTime += waiting;
if (waiting > LongestTime)
{
LongestTime = waiting;
}
if (waiting < ShortestTime)
{
ShortestTime = waiting;
}
}
public void Simulate()
{
Queue <Customer> shortLine = null;
Queue <Customer> Line = null;
if (EventPriorityQueue.IsEmpty()) // Indicates simulation is finished running
{
CheckedOut = true;
return;
}
if (EventPriorityQueue.Peek().Type == EVENTTYPE.ARRIVAL) // If the event is an arrival
{
// Find shortest line and add registrant
shortLine = GetShortLine();
shortLine.Enqueue(EventPriorityQueue.Peek().CurrCustomer);
// Increment if new largest queue found
if (shortLine.Count > LargestQueue)
{
LargestQueue++;
}
// Generate departure event if this customer is at the front of the line
if (shortLine.Count == 1)
{
LeaveEvent(shortLine.Peek());
}
// Event completely handled; remove the event and add to counter
EventPriorityQueue.Dequeue();
TotalArrivals++;
TotalEvents++;
}
else // If the event is a departure
{
// Get the line that registrant is about to leave
for (int i = 0; i < InLine.Count; i++)
{
if (InLine[i].Count > 0)
{
if (InLine[i].Peek().CustomerID == EventPriorityQueue.Peek().CurrCustomer.CustomerID)
{
Line = InLine[i];
break;
}
}
}
// Remove registrant from wait line
Line.Dequeue();
TotalCheckouts++;
TotalEvents++;
// If the wait line is not empty, generate a departure event for the next registrant
if (Line.Count > 0)
{
LeaveEvent(Line.Peek());
}
// Departure event handled; remove from Priority Queue
EventPriorityQueue.Dequeue();
}
} // end RunSimulation