59 lines
2.0 KiB
Java
59 lines
2.0 KiB
Java
/**
|
|
* The ServiceEndEvent is an Event which handles the end of a service.
|
|
* It handles freeing the counter and also generating a departure event
|
|
*
|
|
* @author Yadunand Prem
|
|
* @version CS2030S AY22/23 Semester 2
|
|
*/
|
|
class ServiceEndEvent extends Event {
|
|
|
|
private ServiceCounter counter;
|
|
private Customer customer;
|
|
private Shop shop;
|
|
|
|
public ServiceEndEvent(double time, Customer customer, Shop shop, ServiceCounter counter) {
|
|
super(time);
|
|
this.customer = customer;
|
|
this.shop = shop;
|
|
this.counter = counter;
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return super.toString()
|
|
+ String.format(": %s service done (by %s)", this.customer, this.counter);
|
|
}
|
|
|
|
@Override
|
|
public Event[] simulate() {
|
|
// if there are customers in the counter queue, they will be serviced next.
|
|
// Customers in the shop queue will then be added to the counter queue
|
|
if (!this.counter.isQueueEmpty()) {
|
|
Customer serviceCustomer = this.counter.leaveQueue();
|
|
|
|
if (!this.shop.isQueueEmpty()) {
|
|
return new Event[] {
|
|
new DepartureEvent(this.getTime(), this.customer),
|
|
new ServiceBeginEvent(this.getTime(), serviceCustomer, this.shop, this.counter),
|
|
new JoinCounterQueueEvent(this.getTime(), this.shop.leaveQueue(), counter)
|
|
};
|
|
}
|
|
return new Event[] {
|
|
new DepartureEvent(this.getTime(), this.customer),
|
|
new ServiceBeginEvent(this.getTime(), serviceCustomer, this.shop, this.counter),
|
|
};
|
|
}
|
|
// There can also be the case where the counter queue may be empty but there are
|
|
// customers in the shop queue.
|
|
if (!this.shop.isQueueEmpty()) {
|
|
return new Event[] {
|
|
new DepartureEvent(this.getTime(), this.customer),
|
|
new ServiceBeginEvent(this.getTime(), this.shop.leaveQueue(), this.shop, this.counter),
|
|
};
|
|
}
|
|
// else there are no more customers in the queue, and the counter can be freed
|
|
this.counter.free();
|
|
return new Event[] { new DepartureEvent(this.getTime(), this.customer) };
|
|
}
|
|
}
|