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From Andrus Adamchik <and...@objectstyle.org>
Subject Re: Removing Cayenne cache groups
Date Wed, 26 May 2010 13:13:37 GMT
Odd. MapQueryCacheFactory supports 'removeGroup' method (although it  
is not very efficient compared to say OSQueryCacheFactory). Can you  
possibly run this in debugger to check the state of the cache?

Andrus



On May 25, 2010, at 3:47 PM, Bob Schellink wrote:

> Hi all,
>
> I'm trying to add Cayenne caching for a web project I'm working on.  
> A new DataContext is created for
> each request so I'm looking at adding a shared cache for entities  
> that doesn't change often. However
> if one of those entities does get updated, I want to refresh the  
> cache.
>
> To start off with I'm trying to test with a small standalone  
> application, following the
> documentation here:
>
> http://cayenne.apache.org/doc/query-result-caching.html
>
> My test is fairly similar expect that I specify SHARED_CACHE instead  
> of LOCAL_CACHE:
>
>  SelectQuery query = new SelectQuery(Artist.class);
>  query.setCacheStrategy(QueryCacheStrategy.SHARED_CACHE);
>  query.setCacheGroups("artists");
>
> I'm also using the default LRUMap.
>
> From my test I can see that the query data is cached, but when I  
> update the entity, invoke
> removeGroup and execute my query a second time, the database is not  
> hit, so I assume the cached data
> is returned.
>
> Before going further I just wanted to check whether removeGroup does  
> in fact work on shared caches?
> Chances are that I've misconfigured the caching.
>
> Kind regards
>
> Bob
>


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