| 1 | package de.uka.ipd.sdq.scheduler.resources.passive; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.List; |
| 5 | |
| 6 | import de.uka.ipd.sdq.scheduler.IPassiveResource; |
| 7 | import de.uka.ipd.sdq.scheduler.ISchedulableProcess; |
| 8 | import de.uka.ipd.sdq.scheduler.sensors.IPassiveResourceSensor; |
| 9 | |
| 10 | /** |
| 11 | * Provides observer functionality to passive resources. Normally this |
| 12 | * functionality would reside in an (abstract) super class, but for passive |
| 13 | * resources there is no such class that all resources inherit. |
| 14 | * |
| 15 | * @author Philipp Merkle |
| 16 | * |
| 17 | */ |
| 18 | public class PassiveResourceObservee { |
| 19 | |
| 20 | private List<IPassiveResourceSensor> observers; |
| 21 | |
| 22 | public PassiveResourceObservee() { |
| 23 | observers = new ArrayList<IPassiveResourceSensor>(); |
| 24 | } |
| 25 | |
| 26 | /** |
| 27 | * Notifies observers that the resource has been requested. |
| 28 | */ |
| 29 | public void fireRequest(ISchedulableProcess process, int num) { |
| 30 | for (IPassiveResourceSensor o : observers) { |
| 31 | o.request(process, num); |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Notifies observers that the resource has been acquired. |
| 37 | */ |
| 38 | public void fireAquire(ISchedulableProcess process, int num) { |
| 39 | for (IPassiveResourceSensor o : observers) { |
| 40 | o.acquire(process, num); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Notifies observers that the resource has been released. |
| 46 | */ |
| 47 | public void fireRelease(ISchedulableProcess process, int num) { |
| 48 | for (IPassiveResourceSensor o : observers) { |
| 49 | o.release(process, num); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * @see IPassiveResource#addObserver(IPassiveResourceSensor) |
| 55 | */ |
| 56 | public void addObserver(IPassiveResourceSensor observer) { |
| 57 | observers.add(observer); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * @see IPassiveResource#removeObserver(IPassiveResourceSensor) |
| 62 | */ |
| 63 | public void removeObserver(IPassiveResourceSensor observer) { |
| 64 | observers.remove(observer); |
| 65 | } |
| 66 | |
| 67 | } |