[kepler-users] passing information without firing

[Christopher Brooks]

Hi Ufuk,
So you want an actor that performs an operation, yet does not fire?

You could try doing some of this work in one of the earlier stages
that occurs before firing, such as prefire().  However, there
could be issues involving determinancy and endless loops.
Parameter evaluation is Ptolemy tries to be lazy, so it might
work out ok.

Try looking at
ptolemy.actor.parameters.SharedParameter
ptolemy.actor.parameters.ParameterSet
and
ptolemy.actor.lib.SetVariable

You should also look around for references to ScopeExtendingAttributes.

To check if a TypedCompositeEntity has an entity by name, use
ptolemy.kernel.CompositeEntity.getEntity(String)
To check for a entity of a particular class, see
ptolemy.kernel.CompositeEntity.entityList(Class)
For further information about traversing a workflow, see volume
2 of the design doc
http://ptolemy.berkeley.edu/ptolemyII/designdoc.htm
See especially chapter 1, which covers the kernel.

_Christopher

Ufuk Utku Turuncoglu wrote:
> Hi,
> 
> I design an actor (let's say actorA) that creates its parameters 
> automatically after reading a XML file which is created by another actor 
> (for example, actorB). So, the creation of parameter fields of actorA is 
> depend on actorB. In this case i just want to send location of XML file 
> from actorB to actorA without running workflow. Is there any method to 
> define global variable which can be read by actors in same container? 
> and also How can i check the workflow container that has a specific 
> actor or not?
> 
> ps: I plan to create XML file after dropping actorB into workflow. So, 
> the XML file will be available when drooping actorA.
> 
> Thanks,
> 
> --ufuk
> _______________________________________________
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> Kepler-users at kepler-project.org
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-- 
Christopher Brooks (cxh at eecs berkeley edu) University of California
CHESS Executive Director                      US Mail: 337 Cory Hall
Programmer/Analyst CHESS/Ptolemy/Trust        Berkeley, CA 94720-1774
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