[ZODB-Dev] Re: [Zope3-dev] Persistent module notes and proposal

[Tres Seaver]

Casey Duncan wrote:
> On Sat, 03 Jan 2004 11:02:57 -0500
> Jim Fulton <jim at zope.com> wrote:
> 
>>One particular issue has to do with the scope of persistent modules.
>>I propose that, at least for Zope 3, persistent modules should contain
>>only software and that the state of persistent modules should be fully
>>expressed by their source. This implied that persistent modules in Zope 3
>>should not contain any objects that are mutated outside of the execution
>>of the modules, such as registries, counters, etc.
> 
> 
> This certainly sounds reasonable. We need to make sure this is
> enforced at some level though, preferrably through software (disallowing
> mutating globals in the module somehow) or at least through very strong
> documentation (such as a comment at the top of the module that appears
> by default or an electrostatic charge administered to the chair of the
> respective programmmer). Otherwise I sense an endless barrage of newbie
> FAQs re this in our future...

Surely we can replace the __dict__ of the PM with something "frozen", 
thawing it only when recompiling the source.  I wouldn't want anything 
"advisory" at all, here;  that would be just a bug magnet (FAQs too).

Tres.
-- 
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Tres Seaver                                tseaver at zope.com
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