Re: How to release cached objects ?

Hi Bruno,

Bruno CROS wrote:
> Hi Armin, thank you for answering so quickly. That's always very nice.
> 
> Sorry, but I have 3 more questions about clearing Object Caches :
> 
> - When PersistenceBrokerFactory.releaseAllInstances is done, does Object
> Caches are reset?

Nope.

> 
> - Can, either of these ways to clear cache (
> PersistenceBrokerFactory.releaseAllInstances (if it is so)  and
> PB.clearCache ), damage running transactions using released cached 
> objects ?

I think the PersistenceBrokerFactory.releaseAllInstances could prevent 
running PB instances to release itself back to pool (but OJB will catch 
this exception).
The PB.clearCache() shouldn't affect other running tx (but I never wrote 
a test to verify this).


> 
> - If I choose the PB.clearCache(), how can i iterate *all* the PBs i 
> have in
> my pool ? I can get one PB from the pool, but i don't known how to get the
> whole collection.

PB.clearCache() will clear all used caches (because all implementations 
shipped with OJB use a static map to manage the cached objects). But the 
session caches of other running PB instances are not cleared (when using 
the two-level cache).

Anyway I recommend to write a simple test to verify me answer to play it 
safe.

regards,
Armin

> 
> Thanks again, and again...
> 
> Regards
> 
> 
> 
> Now, my need would be to getAllBroker from
> 
> 
> On 11/13/06, Armin Waibel <[email protected]> wrote:
>>
>> Hi Bruno,
>>
>> Bruno CROS wrote:
>> > Hi,
>> >
>> > Just about a little question.
>> >
>> > Does PersistenceBrokerFactory.releaseAllInstances() release all cached
>> > objects?
>> >
>> > I'm using PersistenceBrokerFactoryDefaultImpl and ObjetCacheDefaultImpl
>> > (and
>> > OJB 1.0.4.)
>> >
>> > The goal is to force server to reload all OJB mapped objects. Is 
>> there a
>> > proper foreseen method to call to do this?
>> >
>>
>> Evict all caches:
>>
>> PB.clearCache()
>>
>> or
>>
>> PB.serviceObjectCache().clear()
>>
>> With
>> PersistenceBrokerFactory.releaseAllInstances()
>>
>> you will release all pooled PB instances and reset the the PB pool.
>>
>> regards,
>> Armin
>>
>> > Thanks a lot.
>> >
>> > Bruno
>> >
>>
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>