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From Unico Hommes <>
Subject Re: EHDefaultStore
Date Fri, 03 Dec 2004 12:52:39 GMT

On 3-dec-04, at 13:27, Jon Evans wrote:

> Hi Jorg,
> On 2 Dec 2004, at 13:38, Jorg Heymans wrote:
>> Jon Evans wrote:
>>> I had to create my own "version" of EHDefaultStore, specific to my 
>>> app, because I didn't want an eternal cache.  I expire items after 5 
>>> minutes so that a db hit is forced (in case the data has been 
>>> updated).  Although EHDefaultStore takes many config parameters, it 
>>> doesn't have eternal, timeToLive or timeToIdle, and is hard coded to 
>>> always create an eternal cache.
>> I'm not sure on the exact role of EHDefaultStore (allright I didn't 
>> know it even existed).
>> I am using my "own" cachemanager created as follows
>> CacheManager.create(new FileInputStream(new File( 
>> "/WEB-INF/classes/ehcache.xml")));
>> In this file i configure my caches and also provide a default cache.
>> I then create my configured caches with 
>> manager.getCache("myconfiguredcache1")
>> (a side effect of this is that Cocoon dumps it's ehcache in the dir 
>> configured in my ehcache.xml). This means it's using the default 
>> cache which is a bad thing IMHO.
> I've just checked out the ehcache source and confirmed what Unico said 
> in his reply: CacheManager is a singleton, so whichever component 
> starts up first (yours or EHDefaultCache) will configure the cache 
> manager.  The second one to start up will just end up using the 
> existing instance, it won't be reconfigured.  I'm sure this will work 
> fine 90% of the time, but I bet it would be hard to track down the 
> reason why it's suddenly ignoring changes you've made in your config 
> file (i.e. it already read the other one).
> This is another reason why I think we need a system-wide ehcache 
> component, which is used by EHDefaultCache and any other instances 
> needed by specific applications...

I don't understand. What is wrong with the Store interface?


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