private void PutIdleUsersAtCashiers()
{
var availableUsers = users.Where(u => u.Cashier == null).ToList();
if (availableUsers.Count == 0)
{
return;
}
// Any idle users, and any free cashier stations, and any non-served tickets?
var availableCashiers = cashiers.Where(c => c.CurrentUser == null).ToList();
var servableSeviceTypes = serviceTypes.Where(st => st.Queue.HasTickets).ToList();
bool validOperation = (availableUsers.Count > 0) && (availableCashiers.Count > 0) && (servableSeviceTypes.Count > 0);
if (!validOperation)
{
// This office is working at max capacity, or there are no waiting customers
return;
}
float cashierOpenProbability = this.UserCashierOpeningsPerTick;
TestRandom(cashierOpenProbability, () =>
{
DummyUser idleUser = GetRandom(availableUsers);
DummyCashier freeCashier = GetRandom(availableCashiers);
DummyServiceType serviceType = GetRandom(servableSeviceTypes);
Log("{0} manning {1}, dealing with {2}", idleUser, freeCashier, serviceType);
freeCashier.Open(idleUser, serviceType);
});
}
public void Open(DummyUser user, DummyServiceType serviceType)
{
if (CurrentUser != null) throw new InvalidOperationException("Cashier already occupied");
CurrentUser = user;
ServiceType = serviceType;
user.Cashier = this;
}
public void Close()
{
if (CurrentTicket != null) throw new InvalidOperationException("Cannot close while in service");
CurrentUser.Cashier = null;
CurrentUser = null;
ServiceType = null;
}
public void Open(DummyUser user, DummyServiceType serviceType)
{
if (CurrentUser != null)
{
throw new InvalidOperationException("Cashier already occupied");
}
CurrentUser = user;
ServiceType = serviceType;
user.Cashier = this;
}
private void CreateDummies()
{
logFallback = this.LogString;
#region Service types and queues
serviceTypes.Clear();
for (int i = 0; i < ServiceTypeCount; i++)
{
byte letterCharCode = (byte)(65 + i);
char letter = Encoding.Default.GetChars(new[] { letterCharCode })[0];
var st = new DummyServiceType
{
Number = i + 1,
TicketPrefix = letter.ToString()
};
serviceTypes.Add(st);
}
#endregion
#region Users
users.Clear();
for (int i = 0; i < UserCount; i++)
{
users.Add(new DummyUser
{
Number = i + 1,
Cashier = null
});
}
#endregion
#region Cashiers
cashiers.Clear();
for (int i = 0; i < CashierCount; i++)
{
cashiers.Add(new DummyCashier
{
Number = i + 1
});
}
#endregion
}
private void DoArrivingCustomers()
{
// Select a service type for the customer to request
DummyServiceType st = GetRandom(serviceTypes);
// Reduce willingness to enqueue where there are lots of ppl ahead in line
float reconsideredProb = 1f;
if (st.Queue.Count > 5)
{
reconsideredProb /= (st.Queue.Count - 5);
}
TestRandom(TicketsDispensedPerTick * reconsideredProb, () =>
{
// Take a ticket in that ST, enqueue it
var ticket = st.GetTicket(true);
ticket.TaskDuration = GetRandomTaskDuration();
string durationDesc = ticket.TaskDuration.TotalSeconds > 5d
? string.Format(" (case dur.: {0}s)", (int)(ticket.TaskDuration.TotalSeconds))
: string.Empty;
Log("New customer got ticket {0}{1}", ticket, durationDesc);
});
}
