Dear all,
this is impressive what is happening at Science IWG recently. I am
new to the list and we are working on OpenChrom with Philip Wenig.
We have also trying to implement Jython scripting into our Eclipse
RCP-based project, however we have not figured out how to integrate
OSGi bundles dynamically. When we look at Jython implementation in
DAWN for example, I see that the jar files are added to the
PYTHONPATH manually.
Would it be possible to get the OSGi bundles (via
Activator.getContext().getBundles()) and add it to the Jython
Intrepreter whenever it is initialized (e.g. via PySystemState or
PythonInterpreter.initialize)?
Best wishes,
Janos
On 23.06.2015 08:58, Erwin de Ley
wrote:
Tracy, all,
(I've cc-d the Science IWG, as I think this is becoming an
interesting cross-project discussion, I hope this is OK... )
First of all it's great that you're presenting the Java/Python
work at eclipsecon.
I wish I could have participated as well, I'll try to be free
for the November conference.
The work done for DAWN is impressive, integrating Python
scripting in many aspects of the RCP workbench.
And this may indeed be of value also for ICE and other
integrated scientific workbenches.
(Jython doesn't seem to be sufficient in all cases. I learned
from Matt and Olof that there's a need for an integration of
"real" Python to ensure that all popular Python libraries can be
used, hence the work on AnalysisRPC.)
Triquetrum hasn't got the same ambition, i.e. it's not the goal
to become a complete analysis workbench.
The focus is on workflows, and I would imagine/hope that our
plugins could then be integrated in larger applications,
similarly to the approach with Passerelle and DAWN.
So I would think that we would mainly target the "AnalysisRPC"
approach, i.e. the Python-related requirements from Triquetrum
would focus on (if I understood the scope correctly of
AnalysisRPC):
- being able to launch a Python runtime in a separate process
- load system scripts in there to set-up an "rpc server"
- load user scripts
- flattening/marshalling of Java data structures and sending
them over to the Python side
- execute the user script
- return result data
- unmarshall/unflatten it to Java structures again
Some more advanced topics that we didn't tackle yet in
"Passerelle with AnalysisRPC", would be :
- efficient handling of large concurrent loads : I would imagine
that it's not optimal to start new python processes for each
script execution.
Is there a way to reuse/share a pool of processes, or execute
scripts concurrently in a single multi-threaded Python "server"?
(cfr evolution for web servers for CGI/FASTCGI/apache mods/...)
- debugging : if there would be a way to have integrated python
debugging on scripts running on the remote python instance, that
would be a tremendous feature (cfr remote Java debugging)
Of course, any inspiration is welcome for extra features that
would be useful in the context of
defining/running/debugging/monitoring workflows!
erwin.
Jay Jay Billings schreef op 22/06/2015 om 23:25:
Tracy,
I would really love to talk to you about this. We
are just now building out our scripting stuff and I'm happy to
share our requirements.
We are targeting Eclipse EASE and Jython at the
moment.
Jay
On Jun 22, 2015 4:43 PM, "Jonah Graham"
< jonah@xxxxxxxxxxxxxxxx>
wrote:
At the conference we will also be talking to other
members of the Science Working Group who have
expressed interest in the technology so we can
capture requirements, scope the project
appropriately and determine whether/how it can be
resourced. Also, the project is part of DAWN today,
but we would like to consider where it would be best
to live (for example, Pydev or also alongside some
of the newer Eclipse scripting projects).
So I will be in a better position to give you an
indication after the conference. It will be good to
have your input into the requirements capture as well.
Regards,
Tracy
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