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Date: Fri, 03 Mar 2006 11:02:02 -0800
From: Reuben Firmin <reuben.firmin@cnet.com>
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To: user-java@ibatis.apache.org
Subject: Re: Flushing caches
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Clinton sez, in the message referenced in that bug: "This is where 
custom, or domain specific, caching comes into play." Apologies if this 
is in TFM, but is there a way to get Ibatis to use your own cache 
implementation? Or is this something that you'd have to write at your 
DAO level?


Sven Boden wrote:

>
> No that's not possible, and probably will never be. There's a JIRA 
> open for it http://issues.apache.org/jira/browse/IBATIS-222 which I 
> would like to close as "won't fix" ;-).
>
> The problem is that iBATIS has no concept of object identity. If you 
> look at the caching code, caching is on the "level of the 
> query/ResultSet", if you have iBATIS e.g. return 2 lists of objects, 
> it may be well be that what for you is 1 and the same object may be 
> cached twice (once in every list). Object identity is a concept that 
> doesn't mix with Sql Mapping.
>
> Regards,
> Sven
>
> Reuben Firmin wrote:
>
>> I've been wondering about a related question -- is there any way to 
>> flush a cache for only one particular object?
>>
>> I'd like to be able to say "I've only modified this Foo bean, so 
>> flush it, but keep the other Foo beans that are in the cache". Are 
>> there problems associated with this that I'm missing?
>>
>>
>> Sven Boden wrote:
>>
>>>
>>> Following should do the trick:
>>>
>>> sqlMapClient.flushDataCache();
>>> or
>>> sqlMapClient.flushDataCache("cache id");
>>>
>>> Look in the com.ibatis.sqlmap.client.SqlMapClient interface.
>>>
>>> Regards,
>>> Sven
>>>
>>> Joe Wolf wrote:
>>>
>>>> Is there any way to programmatically flush a cache?  I'm getting 
>>>> ready to head down the road where I'll just call some bogus 
>>>> statement in my SQL map that's in my cache's flushOnExecute list.  
>>>> I was wondering if there was a more straightforward way.  Thanks.
>>>>
>>>> -Joe  CompSci Resources, LLC
>>>>  
>>>>
>>
>>