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From Emmanuel Bourg <e.bo...@cross-systems.com>
Subject Re: [cache] Turning cache into a thin abstraction layer a la logging ?
Date Tue, 02 Dec 2003 20:31:41 GMT
Mainguy, Mike wrote:

> On this subject, most of the material I see on this topic deals with
> retrieving and storing info that is expensive to get somewhere else.  Most
> of the solutions, however, also assume that it is acceptable that the object
> be removed from cache for whatever reason (time expired, memory low,
> whatever).  It seems, however, that it is assumed the developer will code in
> a defensive manner such that, if the object has been removed from cache,
> they will recreate the object and put it back in there.  Is this the way
> commons-cache is supposed to work?

I think that's the way most caching systems work. The cache is passive 
and doesn't refresh objects on its own.


> I personally would rather have a caching mechanism that is transparent and I
> can have the objects be managed more hands off with a simple interface that
> tells the cache manager how to refresh the data on them.  In my vision, I
> would create an instance of an object and I would add it to the cache
> manager.  After that, I would retrieve the object from the cache manager and
> it I will automatically get a copy that was refreshed at the proper
> interval.  (e.g. every 15 minutes).

I see this object manager as a layer above the caching system.

Emmanuel



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