[kepler-dev] Getting exception when using PNDirector

[Ravi Kumar]

Thanks a lot Christopher
It was really helpful.

Regards,
Ravi

From: Christopher Brooks [mailto:cxh at eecs.berkeley.edu]
Sent: Monday, January 09, 2012 9:34 PM
To: Ravi Kumar
Cc: Kepler-dev at ecoinformatics.org; Shiva Kumar
Subject: Re: [kepler-dev] Getting exception when using PNDirector

Hi Ravi,
You need to call _top.preinitialize() and _top.initialize() first.
I modified CompositeProcessDirector so that if _inputBranchController is null, then an InternalErrorException is thrown:

Exception in thread "main" ptolemy.kernel.util.InternalErrorException: _inputBranchController was null\
?  Perhaps initialize() was not called?
  in .top.<Unnamed Object>
        at ptolemy.actor.process.CompositeProcessDirector._resolveDeadlock(CompositeProcessDirector.ja\
va:701)
        at ptolemy.actor.process.ProcessDirector.fire(ProcessDirector.java:259)
        at ptolemy.actor.CompositeActor.fire(CompositeActor.java:458)
        at test.BowtieTest.init(BowtieTest.java:65)
        at test.BowtieTest.main(BowtieTest.java:18)


See ptolemy/moml/MoMLSimpleApplication.java for how to use ptolemy/actor/Manager.java to run your model:

        _manager = new Manager(_toplevel.workspace(), "MoMLSimpleApplication");
        _toplevel.setManager(_manager);
        _toplevel.addChangeListener(this);

        _manager.addExecutionListener(this);
        _activeCount++;

        _manager.startRun();

        Thread waitThread = new UnloadThread();

        // Note that we start the thread here, which could
        // be risky when we subclass, since the thread will be
        // started before the subclass constructor finishes (FindBugs)
        waitThread.start();
        waitThread.join();
        if (_sawThrowable != null) {
              throw _sawThrowable;
        }

For information about initialize(), see Chapter 5, Designing Actors, page 178 of Volume 1 of the Ptolemy Design Docs at http://ptolemy.eecs.berkeley.edu/ptolemyII/designdoc.htm

_Christopher



On 1/9/12 5:17 AM, Ravi Kumar wrote:
Hi All,

I am trying to create and run a workflow programmatically. I have created one and able to run if I use SDF director. But not able to run this using PNDirector. When I export the workflow in xml using exportMoML() method and open the xml file in kepler, it runs properly.

Following error I am getting when trying to execute workflow programmatically  using PNDirector.

Exception in thread "main" java.lang.NullPointerException
      at ptolemy.actor.process.CompositeProcessDirector._resolveDeadlock(CompositeProcessDirector.java:699)
      at ptolemy.actor.process.ProcessDirector.fire(ProcessDirector.java:259)
      at ptolemy.actor.CompositeActor.fire(CompositeActor.java:459)
      at test.BowtieTest.init(BowtieTest.java:64)
      at test.BowtieTest.main(BowtieTest.java:18)


I am not able to find out root cause for this. Any help on this would be really helpful.

Regards,
Ravi



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Christopher Brooks, PMP                       University of California

CHESS Executive Director                      US Mail: 337 Cory Hall

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