[Zope3-dev] Re: Third party application configuration

[Tres Seaver]

Garrett Smith wrote:
> Chris Withers wrote:
> 
>> Garrett Smith wrote:
>>
>>> Might it be possible to define a general purpose abstract type to 
>>> support arbitrary extentions in zope.conf?
>>
>>
>>
>> What you want is possible in ZConfig, I managed to get it working in 
>> another Python framework-ish application I'm building using twisted, 
>> btu I don't remember how :-S
>>
>> I think an abstract type was indeed how I did it, but I can't remember...
> 
> 
> Yes, I was able to get this working by adding an abstract 'extension' 
> type in Zope's schema.xml. This lets you add %import foo.bar to 
> zope.conf and use whatever you want.
> 
> I decided not to go this route because I'm not comfortable/knowledgable 
> with/of Zope's shutdown procedures, and this is a prerequisite to 
> running subprocesses that start when Zope starts.
> 
> I think the driving use case for this is to launch another process, like 
> a database, when Zope starts. For this to make sense the monitor thread 
> needs a reliable shutdown message, which I don't believe is happening.
> 
> Probably a topic for revisiting down the road.

You might check out Chris McDonough's 'supervisord':

   http://www.plope.com/software/supervisor

which is aimed at putting a single "ctl" monitor in front of multiple 
daemons.

Tres.
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Tres Seaver                                tseaver at zope.com
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