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https://issues.apache.org/jira/browse/OPENJPA-333?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ekin Sokmen updated OPENJPA-333:
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Fix Version/s: (was: 0.9.0)
> ManyToMany relationship not handled properly while using DataCache.
> -------------------------------------------------------------------
>
> Key: OPENJPA-333
> URL: https://issues.apache.org/jira/browse/OPENJPA-333
> Project: OpenJPA
> Issue Type: Bug
> Components: datacache
> Affects Versions: 1.0.0
> Environment: Linux Fedora 6 2.6.22.1-32.fc6
> Java SE 1.5.0_11
> Reporter: Ekin Sokmen
> Attachments: testcase.zip
>
>
> We are implementing WS-methods using POJOs and OpenJPA. Following description
> is a simplified model of the issue we are facing. There is also a test case
> attached which demonstrates the described problem.
> Assume that we have 2 entities EntityA and EntityB in ManyToMany
> relationship. We are going to create a new instance of EntityA and add an
> existing instance of EntityB to it. We are creating a new POJO instance of
> EntityA and add a fully populated offline instance of EntityB to it. This
> instance of EntityA is serialized and sent to the server where we are just
> doing "persist" on this entity. Without DataCache this is working fine.
> If we enable DataCache and create a new instance of EntityA as described
> above the entity is persisted successfully but if we retrieve the instance
> using OpenJPA we get the instance of EntityA but the list of EntityB is not
> populated properly, which means we have a set of EntityB which is not null
> and the size is >0 but the content is just null.
> As a hint: if we debug the code we end up just after commit of new instance
> where the cache is updated. The enhanced method "pcFetchObjectId" of EntityB
> is called but the EntityB is a detached object so it returns null and the
> list of EntityB in EntityA consists of a list of nulls.
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