[Grok-dev] Question about initialing grok.GlobalUtility with data from application containers

[Martijn Faassen]

rmoskal wrote:
> The only way I can think to get this done is to actually pass the
> articles/placements context  to the method where I test the validity of a
> placement.  I can set a flag to indicate if the GlobalUtility has been
> intialized, and load up the existing data exactly once.  This seems
> unsatisfying.  Can anyone suggest a more elegant way?
> 
> It seems like a common use case.

I'm still trying to understand the use case. Could you perhaps give an 
example of a business rule you want to enforce?

I'm just going to list random ideas that come to mind in the hopes that 
one works as an answer to you question:

* you can do grok.getSite() within the global utility code to get the 
site object; you might be able to traverse to your content that way, 
say: grok.getSite()['placements'] to get to your placements container.

* you could catalog your content objects and do a query in the global 
utility.

* you could instead of a global utility perhaps get away with doing this 
in an IObjectAddedEvent handler.

* it is, I believe, also possible to register a placements containerr as 
a local utility directly, though this will need to be done through the 
API - I don't think Grok will help much here. You could then define the 
business rules on the placements container and just look it up using 
component.getUtility()

Regards,

Martijn