Examples of ptolemy.actor.sched.Scheduler

ptolemy.actor.sched.Scheduler
The base class for schedulers. A scheduler schedules the execution order of the containees of a CompositeActor.
A scheduler is contained by a StaticSchedulingDirector, and provides the schedule for it. The director will use this schedule to govern the execution of a CompositeActor.
A schedule is represented by the Schedule class, and determines the order of the firing of the actors in a particular composite actor. In this base class, the default schedule fires the deeply contained actors in the order of their construction. A domain specific scheduler will override this to provide a different order.
The schedule, once constructed, is cached and reused as long as the schedule is still valid. The validity of the schedule is set by the setValid() method. If the current schedule is not valid, then the schedule will be recomputed the next time the getSchedule() method is called. However, derived classes will usually override only the protected _getSchedule() method.
The scheduler does not perform any mutations, and it does not listen for changes in the model. Directors that use this scheduler should normally invalidate the schedule when mutations occur. @author Jie Liu, Steve Neuendorffer @version $Id: Scheduler.java,v 1.81 2005/10/29 01:14:33 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (neuendor) @Pt.AcceptedRating Yellow (neuendor) @see ptolemy.actor.sched.Schedule

     *  one of the associated actors throws it.
     */
    public void preinitialize() throws IllegalActionException {
        super.preinitialize();


        Scheduler scheduler = getScheduler();


        if (scheduler == null) {
            throw new IllegalActionException("Attempted to initialize "
                    + "GR system with no scheduler");
        }


        // force the schedule to be computed.
        if (_debugging) {
            _debug("Computing schedule");
        }


        try {
            scheduler.getSchedule();
        } catch (Exception ex) {
            throw new IllegalActionException(this, ex,
                    "Failed to compute schedule:");
        }
    }

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    /** Create an actor table that caches all the actors directed by this
     *  director.  This method is called once in initialize().
     *  @exception IllegalActionException If the scheduler is null.
     */
    private void _buildActorTable() throws IllegalActionException {
        Scheduler currentScheduler = getScheduler();


        if (currentScheduler == null) {
            throw new IllegalActionException(this, "Attempted to fire "
                    + "GR system with no scheduler");
        }


        currentScheduler.getSchedule();
        _debugViewActorTable();
    }

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        if (container == null) {
            throw new InvalidStateException(this, getName()
                    + " fired, but it has no container!");
        }


        Scheduler scheduler = getScheduler();


        if (scheduler == null) {
            throw new IllegalActionException(this, "Attempted to fire "
                    + "GR system with no scheduler");
        }


        Schedule schedule = scheduler.getSchedule();


        Iterator actors = schedule.actorIterator();


        while (actors.hasNext()) {
            Actor actor = (Actor) actors.next();

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    private void bufferingPhase() throws IllegalActionException {
        System.out.println("Buffering...");


        int iterationsValue = ((IntToken) (iterations.getToken())).intValue();


        Scheduler scheduler = getScheduler();


        if (scheduler == null) {
            throw new IllegalActionException("Attempted to fire "
                    + "system with no scheduler");
        }


        // This will throw IllegalActionException if this director
        // does not have a container.
        Schedule schedule = scheduler.getSchedule();
        Iterator levels = schedule.iterator();


        int levelNumber = 0;


        commandsMap = new HashMap();

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     *  @see ptolemy.distributed.client.ThreadSynchronizer
     *  @exception IllegalActionException If port methods throw it.
     */
    private void parallelFire() throws IllegalActionException {
        //        System.out.println("ParallelFire");
        Scheduler scheduler = getScheduler();


        if (scheduler == null) {
            throw new IllegalActionException("Attempted to fire "
                    + "system with no scheduler");
        }


        // This will throw IllegalActionException if this director
        // does not have a container.
        Schedule schedule = scheduler.getSchedule();
        Iterator levels = schedule.iterator();


        while (levels.hasNext() && !_stopRequested) {
            Schedule level = (Schedule) levels.next();
            Iterator firings = level.firingIterator();

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     *  @exception IllegalActionException If port methods throw it.
     */
    private void pipelinedParallelFire() throws IllegalActionException {
        int iterationsValue = ((IntToken) (iterations.getToken())).intValue();


        Scheduler scheduler = getScheduler();


        if (scheduler == null) {
            throw new IllegalActionException("Attempted to fire "
                    + "system with no scheduler");
        }


        // This will throw IllegalActionException if this director
        // does not have a container.
        Schedule schedule = scheduler.getSchedule();


        //        System.out.println("Schedule size:" + schedule.size());
        int aux = iterationsValue - _iterationCount;


        if (aux < schedule.size()) {

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                            _debug("Waiting for real time to pass: "
                                    + timeToWait);
                        }


                        // Synchronize on the scheduler.
                        Scheduler scheduler = getScheduler();


                        synchronized (scheduler) {
                            try {
                                scheduler.wait(timeToWait);
                            } catch (InterruptedException ex) {
                                // Continue executing.
                            }
                        }
                    }

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Related Classes of ptolemy.actor.sched.Scheduler

ptolemy.actor.Actor

ptolemy.actor.CompositeActor

ptolemy.distributed.domains.sdf.kernel.DistributedSDFDirector

ptolemy.domains.giotto.kernel.GiottoDirector

ptolemy.domains.gr.kernel.GRDirector

ptolemy.kernel.util.Nameable

ptolemy.kernel.util.IllegalActionException

java.util.List

ptolemy.kernel.util.InternalErrorException

java.util.Iterator

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