[IronPython] Foolproof IP Embedding
fuzzyman at voidspace.org.uk
Thu Jul 8 14:39:03 PDT 2010
On 08/07/2010 22:34, Alex wrote:
> In my WPF application, I want to have an "expert mode" that lets the
> end-user write inline python code targetting one specific control (a
> sheetmusic). I embed IronPython and when the user code throws an
> exception I catch it and display it but there are a few foolproof
> 1) If the user write some bad code in a function and binds it to one
> of the control event, it will crash the whole app. Of course I can
> recommand my users to always wrap event handlers into a try catch
> block (or ask to use a decorator that do it) but it's not really
> foolproof. I want to make it impossible to crash the whole app with
> user code. Perhaps native events mecanism is a bit too low-level to be
Catch and report exceptions.
> 2) If the user code makes an infinite loop it will hang the whole
> app. I want to have a "panic button" to stop the script (and even
> restart the python engine if necessary). I suppose I have to run user
> code in a worker thread but then the user have to use Invoke mecanisms
> each time he touchs an UI object? Is there an elegant pattern that
> deals with this concerns?
Execute the user code on a background thread. Provide a means for
actions to be invoked on the gui thread (wrapped in exception handling)
if necessary. Provide a button to abort the thread if it goes on too long.
> This questions are more about .NET and patterns than IronPython, but I
> figured some of you have already thought about it in your IP
> experience. Thanks for any advices!
> Users mailing list
> Users at lists.ironpython.com
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