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Posted to dev@openjpa.apache.org by "Harald Wellmann (JIRA)" <ji...@apache.org> on 2010/09/08 15:37:36 UTC
[jira] Updated: (OPENJPA-1784) Map value updates not flushed
[ https://issues.apache.org/jira/browse/OPENJPA-1784?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Harald Wellmann updated OPENJPA-1784:
-------------------------------------
Attachment: MapUpdate.patch
Unit test exhibiting the problem. A test which updates a map key passes. Another test which only update the map value fails.
> Map value updates not flushed
> -----------------------------
>
> Key: OPENJPA-1784
> URL: https://issues.apache.org/jira/browse/OPENJPA-1784
> Project: OpenJPA
> Issue Type: Bug
> Components: jdbc
> Affects Versions: 2.0.1
> Reporter: Harald Wellmann
> Attachments: MapUpdate.patch
>
>
> I have an entity with a map element collection where the map value is an Embeddable.
> @Embeddable
> public class LocalizedString {
> private String language;
> private String string;
> // getters and setters omitted
> }
>
> @Entity
> public class MultilingualString {
> @Id
> private long id;
> @ElementCollection(fetch=FetchType.EAGER)
> private Map<String, LocalizedString> map = new HashMap<String, LocalizedString>();
> }
> Given a persistent instance m of my entity, I update a member of a given map value and then merge the modified entity:
> EntityManager em = ...;
> em.getTransaction().begin();
> m.getMap().get("en").setString("foo");
> em.merge(m)
> em.getTransaction().commit();
>
> The problem is, the state change of the map does not get saved to the database. With DEBUG logging on, I can see that the flush on commit does not trigger any SQL UPDATE.
> To force the update, I have to put a new value into the map instead of just changing the existing one.
> EntityManager em = ...;
> em.getTransaction().begin();
> m.getMap().put("en"), new LocalizedString("en", "foo"));
> em.merge(m)
> em.getTransaction().commit();
> After this change, I do see the expected UPDATE.
> My Embeddable does have hashCode() and equals() implemented such that the changed map is not equal() to the former version in either case.
> This looks like a bug in the dirty-checking logic in OpenJPA.
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