| 1 | package de.uka.ipd.sdq.scheduler.queueing.runqueues; |
| 2 | |
| 3 | import java.util.Hashtable; |
| 4 | import java.util.Map; |
| 5 | |
| 6 | import de.uka.ipd.sdq.scheduler.processes.IActiveProcess; |
| 7 | import de.uka.ipd.sdq.scheduler.queueing.IRunQueue; |
| 8 | import de.uka.ipd.sdq.scheduler.resources.IResourceInstance; |
| 9 | |
| 10 | public abstract class AbstractRunQueue implements IRunQueue { |
| 11 | |
| 12 | protected Map<IActiveProcess, IResourceInstance> running_on_table; |
| 13 | |
| 14 | protected AbstractRunQueue() { |
| 15 | running_on_table = new Hashtable<IActiveProcess, IResourceInstance>(); |
| 16 | } |
| 17 | |
| 18 | public int getCurrentLoad() { |
| 19 | int running = running_on_table.size(); |
| 20 | int waiting = numWaitingProcesses(); |
| 21 | return running + waiting ; |
| 22 | } |
| 23 | |
| 24 | public boolean isEmpty() { |
| 25 | return getCurrentLoad() == 0; |
| 26 | } |
| 27 | |
| 28 | public boolean removeProcess(IActiveProcess process) { |
| 29 | return running_on_table.remove(process) != null |
| 30 | || removePendingProcess(process); |
| 31 | } |
| 32 | |
| 33 | public boolean contains(IActiveProcess process) { |
| 34 | return running_on_table.containsKey(process) || containsPending(process); |
| 35 | } |
| 36 | |
| 37 | public void addProcess(IActiveProcess process, boolean inFront) { |
| 38 | process.setRunQueue(this); |
| 39 | addProcessToRunQueue(process,inFront); |
| 40 | } |
| 41 | |
| 42 | public boolean containsRunning(IActiveProcess process) { |
| 43 | return running_on_table.containsKey(process); |
| 44 | } |
| 45 | |
| 46 | public void removeRunning(IActiveProcess process) { |
| 47 | assert running_on_table.containsKey(process) : "Process '" + process + "' not running."; |
| 48 | running_on_table.remove(process); |
| 49 | } |
| 50 | |
| 51 | public void setRunningOn(IActiveProcess process, IResourceInstance instance) { |
| 52 | assert running_on_table.get(process) == null; |
| 53 | assert !running_on_table.values().contains(instance); |
| 54 | running_on_table.put(process, instance); |
| 55 | } |
| 56 | |
| 57 | public IResourceInstance runningOn(IActiveProcess process) { |
| 58 | return running_on_table.get(process); |
| 59 | } |
| 60 | |
| 61 | public boolean isIdle(IResourceInstance instance) { |
| 62 | return !instance.processAssigned() |
| 63 | && (running_on_table.size() > 1 || numWaitingProcesses() == 0); |
| 64 | } |
| 65 | |
| 66 | public abstract IActiveProcess getNextRunnableProcess( |
| 67 | IResourceInstance instance); |
| 68 | |
| 69 | /** |
| 70 | * Template Method. Returns |
| 71 | * |
| 72 | * @param process |
| 73 | * @return |
| 74 | */ |
| 75 | public abstract boolean containsPending(IActiveProcess process); |
| 76 | |
| 77 | /** |
| 78 | * Template Method. Returns the number of processs waiting in the queue. |
| 79 | * |
| 80 | * @return |
| 81 | */ |
| 82 | protected abstract int numWaitingProcesses(); |
| 83 | |
| 84 | /** |
| 85 | * Template method. Removes the given process from the queue. |
| 86 | * |
| 87 | * @param process |
| 88 | */ |
| 89 | public abstract boolean removePendingProcess(IActiveProcess process); |
| 90 | |
| 91 | /** |
| 92 | * Template method. |
| 93 | * |
| 94 | * @param process |
| 95 | * @param inFront |
| 96 | */ |
| 97 | protected abstract void addProcessToRunQueue(IActiveProcess process, boolean inFront); |
| 98 | |
| 99 | } |