[kepler-dev] Kepler can only be invoked once

Norbert Podhorszki pnorbert at cs.ucdavis.edu
Fri May 11 06:47:39 PDT 2007

Hi Lisong,

If you want to execute workflows from command-line, just create a script 
similar to kepler.sh and replace the java command for the following:

java -Xmx512m -Xss5m -DKEPLER="$KEPLER" 
-Djava.library.path=$KEPLER/lib ptolemy.actor.gui.MoMLSimpleApplication $*

(note, KEPLER should be defined for the above script)

This can be executed several times at once, giving the workflow name as 

Best regards

      Norbert Podhorszki
      University of California, Davis
      Department of Computer Science
      1 Shields Ave, 2236 Kemper Hall
      Davis, CA 95616
      (530) 752-5076
      pnorbert at cs.ucdavis.edu

On Thu, 10 May 2007, Sun, Lisong wrote:

> Dear Kepler developers,
> Our group is developing a process integration framework which use Kepler to
> build and run workflows to do scientific computations. We built an organizer
> application that will manage the workflow files on the WebDAV server,
> input/output for each run and other provenance information.
> So far we are very impressed by the capabilities of Kepler. Meanwhile we do
> run into a few problems that we are not sure how to deal with.
> One of the problem is that we found Kepler can only be invoked once. And if
> there is a running Kepler, the second invoke command will fail. This does
> get in our way of using the Kepler since we manage all the workflow files
> using our organizer and need to be able to invoke multiple workflows through
> the organizer. We do noticed that it is possible to open multiple workflows
> windows through the menu options. Wonder if there is any special reason why
> it can't run with second invoke command.
> Another goal we want to achieve is to deal with long running workflows. I
> wonder if there is anyway we can use the Kepler as an execution engine and
> run workflows without open the GUI window.
> Thanks for your help.
> Best regards,
> Lisong Sun
> Staff Scientist
> Pacific Northwest National Laboratory
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> Kepler-dev at ecoinformatics.org
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