[Zope] RAM cache invalidation - resolved

[Rauch, Juergen (Juergen)]

Jonathan, 

you were pointing into the right direction. I wrote an external function
like this:

def invalidateAll( aCacheMgr, ob):
   aCacheMgr.ZCacheManager_getCache().ZCache_invalidate(ob)
   return "data has been invalidated"

and I use it in a dtml-document like this:

<dtml-var expr="invalidateAll( myRAMCacheManager,
folderInWhichTheCashedObjectsReside )">

This seems to do the job.

cheerio,

Juergen



-----Original Message-----
From: zope-bounces at zope.org [mailto:zope-bounces at zope.org] On Behalf Of
Rauch, Juergen (Juergen)
Sent: 20 April 2004 17:22
To: zope at zope.org
Subject: RE: [Zope] RAM cache invalidation


Jonathan,

I don't see how this can be done. I am using the Standard RAM Cache
manager to cache the results of a couple of scripts(python). I am not
writing a new Product, just using zope default components. All I want to
do is invalidate all cashed results let's say with a single mouse click.
The purpose of this is to give the user a possibility to refresh the
view whenever he wants to. This means in between the Cache Managers
cleanup_interval.

May be a way to achieve this would be to set the cleanup_interval to 0
and then back to the original value. But this seems to be also a kind of
sick, if it will work at all.

However, thanks for your input

Juergen

-----Original Message-----
From: Small Business Services [mailto:toolkit at magma.ca] 
Sent: 20 April 2004 16:26
To: Rauch, Juergen (Juergen); zope at zope.org
Subject: Re: [Zope] RAM cache invalidation

From: "Rauch, Juergen (Juergen)" <juergen.rauch at optimay.com>
> The 'Flush Cache' tap hyperlinks to 
> 'Control_Panel/Database/manage_cacheGC'.
> The StandardCacheManagers don't have a 'manage_cacheGC' function. At 
> least I couldn't find one. I didn't really make any progress so far. 
> May be I have to extend the interface of the RAM Cache Manager to get 
> this working.

If you are working with python products/external methods to implement
your application, could you subclass your RAM cache manager to get
access to the 'manage_cacheGC' utility?


Jonathan


_______________________________________________
Zope maillist  -  Zope at zope.org
http://mail.zope.org/mailman/listinfo/zope
**   No cross posts or HTML encoding!  **
(Related lists - 
 http://mail.zope.org/mailman/listinfo/zope-announce
 http://mail.zope.org/mailman/listinfo/zope-dev )