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https://issues.apache.org/jira/browse/OPENJPA-1511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12840480#action_12840480
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Ravi P Palacherla commented on OPENJPA-1511:
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Currently there is a way to evict L2Cache when an entity is evicted from
L1Cache.
It is achieved by calling:
EntityManagerImpl.evict(entity) with property
<property name="openjpa.BrokerImpl" value="EvictFromDataCache=true"/>
The above will make sure that evicting an entity from L1cache will also be
evicted form L2cache.
The reverse is not defined anywhere in openJPA docs and I think the reverse is
what is needed as part of this JIRA.
I do not think it is possible (with my limited knowledge) because of the
following reason:
In your testcase you are doing an evict from L2cache. Now the same entity in
L2Cache can be shared by multiple L1cache's.
So an evict from L2cache should be able to find all the L1cache's that share
this entity and should be evicted from all these L1cache's.
I do not think something like this is possible as I may not be able to get to
L1cache (entityManager) from L2cache.
Please let me know if you disagree with any of the above.
Regards,
Ravi.
> Executing a cached query doesn't properly cache results after DataCache
> eviction
> --------------------------------------------------------------------------------
>
> Key: OPENJPA-1511
> URL: https://issues.apache.org/jira/browse/OPENJPA-1511
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.0.0-beta
> Reporter: Rick Curtis
> Assignee: Ravi P Palacherla
> Attachments: TestCache.java
>
>
> When doing some testing I found that the QueryCache sometimes doesn't put
> results into the DataCache.
> I haven't had time to debug the problem, but I'm opening this JIRA so I can
> attach the test case I've created.
> The test scenario is as follows:
> String query = "Select t FROM Item t where 1=1 ORDER BY t.id";
> items = em.createQuery(query,Item.class).getResultList();
> assertTrue(storeCache.contains(Item.class, items.get(0).getId()));
> // Make sure that all of the results are in the DataCache.
> for(Item o : items){
> assertTrue(storeCache.contains(Item.class, o.getId()));
> }
> storeCache.evict(Item.class,items.get(0).getId());
> // Evict one result
> assertFalse(storeCache.contains(Item.class,items.get(0).getId()));
>
> // Executing the same query should re-populate the datacache
> items = em.createQuery(query,Item.class).getResultList();
> assertTrue(storeCache.contains(Item.class, items.get(0).getId())); // fails
> here
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