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From "Marco (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JDO-667) Extend PersistenceManageFactory to return all known entity classes
Date Mon, 25 Oct 2010 20:00:24 GMT

    [ https://issues.apache.org/jira/browse/JDO-667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924700#action_12924700
] 

Marco commented on JDO-667:
---------------------------

Hi Craig,

thanks a lot for your very quick response! Unfortunately, I can't promise. I'm currently very
busy with a customer's project. If the project ends as planned, I'll have the first December
week time for writing the technical description. But if the project becomes delayed, I can't
say for sure, yet, and I'll be in holidays afterwards (till the end of January).

Concerning the appearance of the class, I'd say it should be in the list as soon as the JDO
implementation initialises its meta-data. This means normally when getExtent(...), newQuery(...),
makePersistent(...) or sth. similar is called the first time.

Additionally, if the implementation remembers all previously managed classes like DataNucleus
can <http://www.datanucleus.org/products/accessplatform_2_2/jdo/autostart.html>, the
classes should be enlisted directly at start-up.

This behaviour is IMHO quite straight-forward and probably what DataNucleus already does internally.

> Extend PersistenceManageFactory to return all known entity classes
> ------------------------------------------------------------------
>
>                 Key: JDO-667
>                 URL: https://issues.apache.org/jira/browse/JDO-667
>             Project: JDO
>          Issue Type: New Feature
>    Affects Versions: JDO 3
>            Reporter: Marco
>             Fix For: JDO 3 maintenance release 1
>
>
> JDO 3 now has the ability to declare meta-data programmatically. Part of this feature
is the ability to ask the PersistenceManagerFactory via the method getMetadata(java.lang.String)
for the meta-data of one single class. But there is no way to list all known classes.
> I therefore kindly ask for a new method in PersistenceManagerFactory like this:
> Collection<String> getClassesWithMetadata();
> Btw., this is Andy's suggestion posted here: http://www.datanucleus.org/servlet/forum/viewthread_thread,6379#33224
> I'd greatly appreciate, if this method became a part of JDO 3.1.
> Edit 1: I just saw the various overloaded methods getManagedObjects(...) in PersistenceManager
- maybe the alternative method name "getManagedClasses()" would be more consistent?

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