[Insight-developers] Managing Abort in Filters

[Lorensen, William E (Research)]

Luis made a first cut the abort feature. In discussions (below) we decided
to move the implementation into the superclass (itkProcessObject). We have
not done that yet. However, Luis did do a few filters with his initial
approach. I don't think the API will chamge.

As for the stability of the system. It's looking pretty good these days. I
would wait for a "clean" morning dahsboard, then update to that.

Bill

-----Original Message-----
From: Kurt Augustine [mailto:augustine.kurt@mayo.edu]
Sent: Wednesday, April 16, 2003 3:51 PM
To: Insight Developers List
Subject: RE: [Insight-developers] Managing Abort in Filters


Has this been implemented yet?  We could really use this abort feature
described below.  If so, is the current cvs version pretty stable (i.e. is
it safe to replace 1.2 for our development).

Thanks ... Kurt

> -----Original Message-----
> From: Luis Ibanez [mailto:luis.ibanez@kitware.com]
> Sent: Friday, April 11, 2003 11:05 PM
> To: Lorensen, William E (Research)
> Cc: Miller, James V (Research); Insight Developers List
> Subject: Re: [Insight-developers] Managing Abort in Filters
> 
> 
> 
> Bill,
> 
> That's a good idea,
> 
> I agree with you in that it is a lot of work to add
> the try/catch to all the filters. It actually takes
> away the simplicity + elegance of some filters...
> 
> I'll move the exception to the call of GenerateData
> in ProcessObject, and double check the behavior
> in the filters that need clean up.
> 
> This will be done progressively...
> 
> 
> Luis
> 
> 
> ---------
> Lorensen, William E (Research) wrote:
> > Luis,
> > Why not move the try/catch and the if(abort generate data) code into
> > itkProcessObject.cxx. The try/catch would go around the 
> GenerateData in
> > ProcessObject.
> > 
> > Then, be default, every filter would support abort. If a 
> filter needed to
> > modify the default behavior
> > 
> > 1) to clean up intermediate data. Then it could try/catch, 
> clean up its data
> > and rethrow.
> > 2) to produce intermediate results. It could try/catch, 
> reset the Abort flag
> > and continue.
> > 
> > It seems like a lot of work to add the current code to all 
> filters since
> > most will use the default behavior.
> > 
> > Bill
> > 
> 
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