[kepler-dev] Stop a workflow from Command Line

[subhav mital]

Thanks so much for this great explanation.

I have tried to stop the workflow in Windows using the TaskKill command, but
that exits the application alongwith stopping the workflow.Is kill -1
%1 similar
to that?

What I wish to simulate is similar to clicking the stop button from within
the workflow while it runs.

Eg:

You are at Stage 2 of the workflow. Now due to some reason, you wish to
exit. Is there any way to accomplish this? (Kepler Application should be
running but the workflow must stop such that if desired you can restart the
workflow by hitting the play button)

Thanks.




On Mon, Mar 29, 2010 at 4:40 PM, Christopher Brooks
<cxh at eecs.berkeley.edu>wrote:

> Hi Subhav,
> Are you talking about the PN model of computation?
> If so, then take a look at:
>
> http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/doc/codeDoc/ptolemy/domains/pn/kernel/PNDirector.html
> --start--
> There are at least three ways for a PN model to terminate itself:
>
>   1. Have the model starve itself. Typically, a boolean switch is used.
>      See the PN OrderedMerge demo at
> ptolemy/domains/pn/demo/OrderedMerge/OrderedMerge.xml
>   2. Have the model call the Stop actor. See the PN RemoveNilTokens demo at
>      ptolemy/domains/pn/demo/RemoveNilTokens/RemoveNilTokens.xmll
>   3. Set the firingCountLimit (LimitedFiringSource._firingCountLimit) actor
> parameter
>      to the number of iterations desired. Actors such as Ramp extend
> LimitedFiringSource
>      and have the firingCountLimit parameter.
> --end--
>
> Unfortunately, the Kepler-2.0 documentation for the PN director has not
> been updated to
> reflect recent changes in the class documentation for PNDirector.java.  I
> think this
> is because directors-2.0/resources/kar/CoreDirectors/PNDirector.xml has not
> been updated.
> Thus, right clicking on the PNDirector and choosing Documentation->Display
> does not
> include the above.  I'll submit a bug.
>
> There is no particular command line interface to stop a model.  In theory,
> an actor could
> be written that would watch for signals and if the appropriate signal was
> sent, then
> it would fire.  This actor could then be connected to a Stop actor.
>  However, I'm not
> so sure signal handling in Java is well documented or portable.
>
> The way this would work in Unix is to run the model in the background and
> then
> use "kill -1 %1" where -1 means that SIGHUP is passed to the Kepler
> process.
>
>
> Note that vergil includes a -runThenExit command line argument, see
> ptolemy/actor/gui/ConfigurationApplication.java
> For this to work, the application has to terminate though.
>
> I'm not sure if Kepler exposes that command line argument.  See
>
> https://kepler-project.org/developers/reference/executing-kepler-from-the-command-line
>
> _Christopher
>
> On 3/28/10 11:59 PM, subhav mital wrote:
>
>> Hello,
>>
>> Just wondering if there is any way to stop a workflow after execution is
>> complete. While running some actors, even after the workflow has
>> completed, the play button seems on and one has to manually hit the stop
>> button.
>>
>> Is there any command line statement to start and stop a workflow without
>> having to manually do this ?
>>
>> Thanks.
>>
>>
>>
>> _______________________________________________
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>>
>
> --
> Christopher Brooks, PMP                       University of California
> CHESS Executive Director                      US Mail: 337 Cory Hall
> Programmer/Analyst CHESS/Ptolemy/Trust        Berkeley, CA 94720-1774
> ph: 510.643.9841 fax:510.642.2718             (Office: 545Q Cory)
> home: (F-Tu) 707.665.0131 cell: 707.332.0670
>
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