| 1 | package de.uka.ipd.sdq.scheduler.queueing.strategies; |
| 2 | |
| 3 | import java.util.List; |
| 4 | |
| 5 | import de.uka.ipd.sdq.scheduler.loaddistribution.IInstanceSelector; |
| 6 | import de.uka.ipd.sdq.scheduler.loaddistribution.IProcessSelector; |
| 7 | import de.uka.ipd.sdq.scheduler.processes.IActiveProcess; |
| 8 | import de.uka.ipd.sdq.scheduler.queueing.IQueueingStrategy; |
| 9 | import de.uka.ipd.sdq.scheduler.queueing.IRunQueue; |
| 10 | import de.uka.ipd.sdq.scheduler.resources.IResourceInstance; |
| 11 | import de.uka.ipd.sdq.scheduler.resources.active.SimResourceInstance; |
| 12 | |
| 13 | public class SingleQueueStrategy implements IQueueingStrategy { |
| 14 | |
| 15 | private IRunQueue runQueue; |
| 16 | private IProcessSelector processSelector; |
| 17 | private IInstanceSelector idealInstanceSelector; |
| 18 | public SingleQueueStrategy(IRunQueue runQueue, |
| 19 | IProcessSelector processSelector, |
| 20 | IInstanceSelector idealInstanceSelector) { |
| 21 | super(); |
| 22 | this.runQueue = runQueue; |
| 23 | this.processSelector = processSelector; |
| 24 | this.idealInstanceSelector = idealInstanceSelector; |
| 25 | } |
| 26 | |
| 27 | public IActiveProcess getNextProcessFor(IResourceInstance instance) { |
| 28 | return processSelector.select(runQueue, instance); |
| 29 | } |
| 30 | |
| 31 | public void registerProcess(IActiveProcess process, IResourceInstance current) { |
| 32 | IResourceInstance instance = process.getLastInstance(); |
| 33 | if (instance == null) { |
| 34 | instance = idealInstanceSelector.selectInstanceFor(process, current); |
| 35 | process.setLastInstance(instance); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | public void addProcess(IActiveProcess process, IResourceInstance current, boolean inFront) { |
| 40 | registerProcess(process, current); |
| 41 | runQueue.addProcess(process, inFront); |
| 42 | } |
| 43 | |
| 44 | |
| 45 | public void activelyBalance(IResourceInstance instance) { |
| 46 | // nothing to do. |
| 47 | } |
| 48 | |
| 49 | |
| 50 | public boolean removePendingProcess(IActiveProcess process) { |
| 51 | return runQueue.removePendingProcess(process); |
| 52 | } |
| 53 | |
| 54 | |
| 55 | public boolean containsPending(IActiveProcess process) { |
| 56 | return runQueue.containsPending(process); |
| 57 | } |
| 58 | |
| 59 | |
| 60 | public void removeRunning(IActiveProcess process) { |
| 61 | runQueue.removeRunning(process); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | public IResourceInstance runningOn(IActiveProcess process) { |
| 66 | return runQueue.runningOn(process); |
| 67 | } |
| 68 | |
| 69 | |
| 70 | public void setRunningOn(IActiveProcess process, IResourceInstance instance) { |
| 71 | runQueue.setRunningOn(process, instance); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | public boolean isIdle(IResourceInstance instance) { |
| 76 | return runQueue.isIdle(instance); |
| 77 | } |
| 78 | |
| 79 | public void forkProcess(IActiveProcess process, IResourceInstance current, |
| 80 | boolean inFront) { |
| 81 | addProcess(process, current, inFront); |
| 82 | } |
| 83 | |
| 84 | public void fromRunningToWaiting(IActiveProcess process) { |
| 85 | removeRunning(process); |
| 86 | } |
| 87 | |
| 88 | public void fromWaitingToReady(IActiveProcess process, |
| 89 | IResourceInstance current, boolean in_front_after_waiting) { |
| 90 | addProcess(process, current, in_front_after_waiting); |
| 91 | } |
| 92 | |
| 93 | public void terminateProcess(IActiveProcess process) { |
| 94 | removePendingProcess(process); |
| 95 | } |
| 96 | |
| 97 | public void onSleep(IResourceInstance lastInstance) { |
| 98 | // nothing to do |
| 99 | } |
| 100 | |
| 101 | public List<IActiveProcess> getStarvingProcesses( |
| 102 | IResourceInstance instance, double starvationLimit) { |
| 103 | return runQueue.getStarvingProcesses(starvationLimit); |
| 104 | } |
| 105 | |
| 106 | public void resetStarvationInfo() { |
| 107 | runQueue.resetStarvationInfo(); |
| 108 | } |
| 109 | |
| 110 | public int getQueueLengthFor(SimResourceInstance simResourceInstance) { |
| 111 | return this.runQueue.getCurrentLoad(); |
| 112 | } |
| 113 | |
| 114 | } |