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Posted to dev@openjpa.apache.org by "Michael Dick (JIRA)" <ji...@apache.org> on 2010/01/08 01:12:54 UTC
[jira] Updated: (OPENJPA-1328) Move cacheable class configuration
to ClassMetaData
[ https://issues.apache.org/jira/browse/OPENJPA-1328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Dick updated OPENJPA-1328:
----------------------------------
Fix Version/s: 2.0.0
1.3.0
1.2.2
> Move cacheable class configuration to ClassMetaData
> ---------------------------------------------------
>
> Key: OPENJPA-1328
> URL: https://issues.apache.org/jira/browse/OPENJPA-1328
> Project: OpenJPA
> Issue Type: Bug
> Components: datacache
> Affects Versions: 1.2.0, 1.2.1
> Reporter: Jody Grassel
> Assignee: Michael Dick
> Fix For: 1.2.2, 1.3.0, 2.0.0
>
> Attachments: OpenJPA_1.2.x_OJ1328.patch
>
>
> I'm proposing to move the cacheable class configuration processing from the datacache classes to ClassMetaData. The feature, introduced in OPENJPA-1045, effectively works by returning null for ClassMetaData.getDataCacheName(), where classes which should not be cached return null, otherwise the name of the datacache they may be cached by is returned.
> THe problem is that some third party datacache plugins are not reentrant, and the existing ClassMetaData.isCacheable() makes use of the method call getRepository().getConfiguration().getDataCacheManagerInstance(). This invokes the initialization of the datacache, which may result in further initialization/copying of CMD objects, which reenter the isCacheable() method. If a third party datacache plugin is not reentrant safe, this can cause a failure in the form of Exceptions or hung threads.
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