| 1 | package de.uka.ipd.sdq.simucomframework.fork; |
| 2 | |
| 3 | import org.apache.log4j.Logger; |
| 4 | |
| 5 | import de.uka.ipd.sdq.probespec.framework.RequestContext; |
| 6 | import de.uka.ipd.sdq.probespec.framework.garbagecollection.IRegionBasedGarbageCollector; |
| 7 | import de.uka.ipd.sdq.simucomframework.Context; |
| 8 | import de.uka.ipd.sdq.simucomframework.SimuComSimProcess; |
| 9 | import de.uka.ipd.sdq.simulation.abstractsimengine.ISimProcess; |
| 10 | |
| 11 | /** |
| 12 | * Base class for ForkBehaviours. Generator creates a specialisation of this and |
| 13 | * uses it to execute actions in parallel |
| 14 | * |
| 15 | * @author Steffen Becker |
| 16 | * |
| 17 | */ |
| 18 | public abstract class ForkedBehaviourProcess extends SimuComSimProcess { |
| 19 | |
| 20 | protected Context ctx; |
| 21 | private ISimProcess myParent; |
| 22 | protected String assemblyContextID; |
| 23 | private boolean isAsync; |
| 24 | private boolean isTerminated = false; |
| 25 | private IRegionBasedGarbageCollector<RequestContext> blackboardGarbageCollector; |
| 26 | |
| 27 | private static Logger logger = Logger.getLogger(ForkedBehaviourProcess.class.getName()); |
| 28 | |
| 29 | public ForkedBehaviourProcess(Context myContext, String assemblyContextID, boolean isAsync) { |
| 30 | super(myContext.getModel(), "Forked Behaviour", myContext.getThread().getRequestContext()); |
| 31 | |
| 32 | // use the session id from the parent process |
| 33 | this.currentSessionId = myContext.getThread().getCurrentSessionId(); |
| 34 | |
| 35 | this.ctx = new ForkContext(myContext, this); |
| 36 | |
| 37 | this.myParent = myContext.getThread(); |
| 38 | this.assemblyContextID = assemblyContextID; |
| 39 | this.isAsync = isAsync; |
| 40 | this.blackboardGarbageCollector = myContext.getModel().getProbeSpecContext().getBlackboardGarbageCollector(); |
| 41 | } |
| 42 | |
| 43 | @Override |
| 44 | protected void internalLifeCycle() { |
| 45 | blackboardGarbageCollector.enterRegion(getRequestContext().rootContext()); |
| 46 | executeBehaviour(); |
| 47 | blackboardGarbageCollector.leaveRegion(getRequestContext().rootContext()); |
| 48 | this.isTerminated = true; |
| 49 | |
| 50 | // if this has been synchronous call of the behaviour and the parent has |
| 51 | // not yet terminated (which may happen under some wired conditions) and |
| 52 | // the simulation is still running, we can think about triggering the |
| 53 | // parent again. |
| 54 | if (!isAsync && !myParent.isTerminated() && simulationIsRunning()) |
| 55 | myParent.scheduleAt(0); |
| 56 | else |
| 57 | logger.debug("Asynch behaviour finished at simtime " + getModel().getSimulationControl().getCurrentSimulationTime()); |
| 58 | } |
| 59 | |
| 60 | private boolean simulationIsRunning() { |
| 61 | return this.ctx.getModel().getSimulationControl().isRunning(); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Template method filled by the generate with the parallel behaviour |
| 66 | * specified in the PCM's fork action |
| 67 | */ |
| 68 | protected abstract void executeBehaviour(); |
| 69 | |
| 70 | public boolean isAsync() { |
| 71 | return isAsync; |
| 72 | } |
| 73 | |
| 74 | /* |
| 75 | * (non-Javadoc) |
| 76 | * |
| 77 | * @see |
| 78 | * de.uka.ipd.sdq.simulation.abstractsimengine.SimProcess#isTerminated |
| 79 | * () |
| 80 | */ |
| 81 | @Override |
| 82 | public boolean isTerminated() { |
| 83 | return this.isTerminated; |
| 84 | } |
| 85 | |
| 86 | } |