On Wed, Nov 26, 2008 at 4:09 PM, Raphael Simon <[EMAIL PROTECTED]> wrote:
>
> This looks great. A few questions:
>
> 1. What would cause an expression to trigger the 'on-error' sub-process
> exactly?

In the fact, when applying or replying [to] an expression, errors are caught

http://github.com/jmettraux/ruote/tree/r0.9.19/lib%2Fopenwfe%2Fexpool%2Fexpressionpool.rb#L941-944

Usually the error journal, if present, handles them.

I'm thinking about placing an observer before the error journal. If
the process definition or process definition segment registered a
subprocess for handling errors, this subprocess would get called
instead of letting the error journal handle the error.


> 2. Would that also cause the current sequence to be aborted?
> 3. Would that apply to concurrence expressions as well?

As I currently see it, it would cause any expression inside of an
expression with a on-error handler to get "rescued".

It would also mean that there should be a mechanism (an expression)
for triggering arbitrary exceptions (much like redo and undo can
short-circuit a segment of process). Have to refine those ideas.


> Thanks for the prompt replies. I'm looking forward to resuming this
> discussion tomorrow (bedtime here in California).

GMT +9 here. Thanks for the strong feedback.


Best regards,

-- 
John Mettraux   -   http://jmettraux.wordpress.com

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