[Zope-PAS] Re: RFC: PAS caching

Jim Fulton jim at zope.com
Tue Oct 12 03:28:27 EDT 2004

Jens Vagelpohl wrote:
> After considering the comments so far and taking a closer look at the 
> RAMCacheManager I have come up with an idea along the lines of Tres' 
> suggestion:
> - Inside the PAS instance it is possible to create RAM Cache Manager 
> objects
> - Plugins for which caching makes sense mix in the ZCacheable mixin 
> class, and thus become "registerable" with these cache managers
> This solution leverages the existing cache manager architecture which 
> has been around for a long time and seems to offer enough flexibility. 
> It also satisfies my pet peeve of plugins not having to know about or 
> talk to the central PAS instance.
> The needed changes would include...
> - Changing PAS to allow creation of RAM cache managers
> - Changing plugins to mix in ZCacheable and making use of the 
> appropriate ZCacheable API when it comes to 
> retrieving/changing/inserting data
> Does that sound like a good idea?

Overall yes, and for Zope 2 in particular.  IN Zope 3, PAS instances are
not containers.  Plugins can still utilize the caching architecture
using cache utilities.


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