[infinispan-dev] Infinispan Persistence Manager and JBoss Messaging Journal

[Manik Surtani]

On 30 Jul 2009, at 18:04, Clebert Suconic wrote:

> yes.. .the Journal is not a DB.
> You have method to recover the state on load. but you need to keep the
> data yourself outside of the Journal on the HashMaps.
>
>
> The Journal is a way to make your memory persistent.
>
> I thought this was the case for Infinispan. Maybe I missed something
> when reading the code.

Yes - the cache store stores a superset of what is in memory.   
Overflow.  So it still needs to be accessible in a random fashion,  
using a key.

See the load() API on the CacheLoader interface.

>
>
> On 07/30/2009 12:00 PM, Jason T. Greene wrote:
>> Last time this was discussed, it was mentioned that the journal does
>> not provide random access. Is this still the case? In order for a
>> cache store/loader to be useful, it needs to offer an indexing  
>> mechanism.
>>
>> Clebert Suconic wrote:
>>> I had a quick look on the Persistence code for Infinispan yesterday,
>>> and it looks like the JBoss Messaging Journal was just made for
>>> infinispan.
>>>
>>>
>>> The only thing I couldn' t understand was the streaming operations
>>> fromStream and toStream. What they are used for, and how they
>>> translate into multiple records?
>>>
>>>
>>> We have talked about making the Journal a sub project of JBoss
>>> Messaging, in a way other projects would be able to reuse (if that
>>> interests you guys).
>>>
>>>
>>>
>>> Cheers,
>>>
>>>
>>>
>>> Clebert
>>> _______________________________________________
>>> infinispan-dev mailing list
>>> infinispan-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>
>>
>
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--
Manik Surtani
manik at jboss.org
Lead, Infinispan
Lead, JBoss Cache
http://www.infinispan.org
http://www.jbosscache.org