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https://issues.apache.org/jira/browse/OPENJPA-1770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rick Curtis updated OPENJPA-1770:
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Fix Version/s: 2.1.0
Affects Version/s: 2.0.0
Component/s: datacache
kernel
> Inconsistent behaviour when fetching an Entity that has a null embeddable and
> the DataCache is enabled
> ------------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1770
> URL: https://issues.apache.org/jira/browse/OPENJPA-1770
> Project: OpenJPA
> Issue Type: Bug
> Components: datacache, kernel
> Affects Versions: 2.0.0, 2.1.0
> Reporter: Rick Curtis
> Assignee: Rick Curtis
> Fix For: 2.1.0
>
> Attachments: OPENJPA-1770.patch
>
>
> While investigating the failures for OPENJPA-1469 I found that when the
> DataCache is enabled we behave differently when finding an Entity that has an
> empty/null embeddable. Take the following domain model:
> @Entity
> class A{
> @Id
> int id;
> @Embeddable
> Emb emb;
> ...
> }
> @Embeddable
> class Emb{
> ....
> }
> The scenario where this is observed is when the datacache is not enabled and
> I persist Entity [A] with a null Emb. In a new persistence context I search
> for that same Entity, Emb is now an empty embeddable. In that same case when
> the datacache is enabled the find operation returns an Entity with a null
> embeddable. This is because the DataCache knows that Emb is null, when the
> data is retrieved from the database we don't know if it should be null or
> empty.
> The datacache behavior is probably more correct, but it is inconsistent with
> the non-datacache behavior. Since the datacache is supposed to be transparent
> to the application I am going to make this two cases operate in the same
> manner. I asked posted this observation to the dev mailing list[1] but didn't
> receive any responses.
> [1] http://openjpa.markmail.org/thread/xyytunrvcciv5ura
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