[infinispan-dev] [ISPN-6] (Infinispan cache provider for Hibernate) Remaining TODOs, notes and questions

[Galder Zamarreno]

On 08/04/2009 05:53 PM, Brian Stansberry wrote:
> Galder Zamarreno wrote:
>> Hi,
>>
>> Re: https://jira.jboss.org/jira/browse/ISPN-6
>>
>> Source code for this is currently located in an Infinispan branch in
>> the Hibernate SVN repo:
>>
>> https://svn.jboss.org/repos/hibernate/core/branches/INFINISPAN/
>> http://anonsvn.jboss.org/repos/hibernate/core/branches/INFINISPAN/
>>
>> I've picked this JIRA from Chris Bredesen. I'm waiting to get an
>> answer to an email I sent him yesterday but in the mean time, here's a
>> list of TODOs:
>>
>> 1. Current Infinispan region factory needs to point to a config with
>> named caches. Suggested property name:
>> hibernate.cache.region.ispn4.configs
>>
>> 2. Need a equivalent version of this region factory where cache
>> manager is retrieved from JNDI. Suggsted property name:
>> hibernate.cache.region.ispn4.manager
>>
>> 3. Configuration properties for named cache names. Suggested property
>> names:
>> hibernate.cache.region.ispn4.cfg.entity
>> hibernate.cache.region.ispn4.cfg.collection
>> hibernate.cache.region.ispn4.cfg.query
>> hibernate.cache.region.ispn4.cfg.timestamps
>>
>> 4. Resolve TransactionalAccess, ReadOnlyAccess and BaseRegion TODOs.
>>
>> 5. Enhance query results region so that query changes are not
>> propagated if invalidation is used and add query.localonly equivalent
>> property. Suggested name: hibernate.cache.region.ispn4.query.localonly
>>
>> 6. Add more unit tests!
>>
>> 7. Document in wiki.
>>
>> Some notes I've made while investigating this:
>>
>> - Whereas with JBC2/3, we had the possibility of a shared cache for
>> all types (entities, collections, query,...etc) and a multiplexed
>> version where each type had a specific cache, in Infinispan, it only
>> makes the latter. Amongst other reasons because we don't have eviction
>> regions any more and so we can't exclude the timestamp modification
>> region as we did in JBC2/3. Overall, having a single option is a good
>> thing from a configuration and usability perspective! Remember how
>> complex eviction region definition could get for entities...
>>
>
> Is this basically a configuration issue? I.e. the eviction would have to
> be configured via Hibernate SessionFactory properties, since the
> Infinispan config file can't express it? That's unfortunate, as it means
> different entity types can't have different eviction behavior.

Different entities can indeed have different eviction settings as 
mentioned in another email. My reference to evictions above was merely 
about the FQNs leading to entities...etc.

>
> The timestamps could be handled programatically; the Hib/Ispn
> integration knows it's dealing with timestamps.
>
> All that said, I have no problem with eliminating the possibility of a
> shared cache. There is no legacy usage to support like there was with
> JBC2. And if people want a shared cache, we can revisit.
>
>> Finally, a question to the list, specially for Brian/Steve who worked
>> on the JBC2/3 integration layer:
>>
>> - Do we need a similar timestamp region local cache implementation for
>> an ISPN based cache provider?
>>
>
> Sorry, I don't understand the question.
>
>> Cheers,
>
>

-- 
Galder Zamarreño
Sr. Software Engineer
Infinispan, JBoss Cache