----- Original Message ----- 
From: "Allen Schmidt Sr." <aschm...@fredericksburg.com>
To: "Dieter Maurer" <die...@handshake.de>
Cc: "Zope Users" <zope@zope.org>
Sent: Sunday, October 04, 2009 4:40 PM
Subject: Re: [Zope] [Zope-Annce] ZClasses resurrected

> So...we are on 2.8.10 and our biggest app on our site is a ZClass based
> news object. How close will this provide functionality to just drop our
> data.fs into 2.12 and have those zclasses work?
> This is huge news! Thanks Dieter!!!!

For long term stability and maintainability I would strongly recommend 
rewriting your application to remove ZClasses.

Depending on your application(s) this can be a non-trivial task, but once it 
is done you can return to standard zope releases.

This is a business risk/reward situation: how important are the ZClass apps 
to your business?  Can you afford to have them stop working?  Are willing to 
maintain your own ZClass patches (Dieter has provided a starting point, but 
what if Dieter "gets hit by a bus")?

I have rewritten ZClass apps twice now, and it can be a serious PITA, but 
the peace-of-mind, ongoing product stability and maintainability was well 
worth it.


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