[Zope-dev] [ZConfig] wishlist

[Dieter Maurer]

Hi Fred,

Fred L. Drake, Jr. wrote at 2003-12-30 15:08 -0500:
> ...
>Dieter Maurer writes:
> > ...
> > I feel the configuration process is not yet as modular
> > as it should be?
>
>There's certainly room for improvement.
>
> > Let's explain what extensions I have:
> > 
> >  1. an alternate "Transience" implementation for Zope sessions
>
>I don't know how the session machinery works in Zope; if there's a
>section to configure that at all, it should at least be easy to make
>it possible to provide an alternate section type that can be used.

It uses top level keys for configuration.

But anyway (even if session configuration were
encapsulated in its own section),
I would need to change the Zope schema (if I understand
"ZConfig" correctly, which is not yet sure).

Ideally, I would like to be able to combine schemas from schema
components -- say: "use the standard Zope schema and apply the
following additions/changes".


>What changes did you need to make to Zope to make this configurable?

I added a "session_module" key to "zopeschema.xml".

> >  2. a new log handler "rotated_logfile" (which performs automatic
> >     daily rotation with log files named "prefix.date")
>
>This doesn't need any changes in zLOG; you should be able to provide a
>new component and use %import to load it in the configuration.

Thank you for confirmation. I expected this to be so.

> >  3. a common piece of configuration used for communication
> >     between Zope and a "checkZope" process (which supervises
> >     that Zope responds sufficiently fast)
> >     
> > I solved 1 and 2 by rudely modifying Zope sources ("zLOG/component.xml"
> > and associated "handlers", "Zope/Startup/zopeschema.xml" and associated
> > "handlers"). I do not yet have a solution for 3 but I probably will
> > give the "checkZope" process the complete Zope schema and configuration
> > file.
>
>I'm not sure why you want the checkZope process to load Zope's
>configuration at all.  Can't you just use a separate configuration
>file?
> If there are portions that need to be shared, you can place
>those in a separate file and %include that into the Zope and checkZope
>configurations.

Thank you: I overlooked the "%include" for configuration files.
It satisfies my use case with respect to the actual configuration.
I must still think about it on the schema level (but that is not
pressing as the affected schema part is trivial).

> ...
> > I think, a general "include" function for schemas (including not
> > only types but complete schemas) and configuration files
> > could provide this kind of modularity.
>
>Have you looked at the <schema extends="..."> support Phillip Eby
>added?

I read about it but did not recognized its potential to solve
my modularity requirements.

I do now! Thank you!

Thus, all my wishes are already addressed by the current
"ZConfig" :-)

-- 
Dieter