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https://issues.apache.org/jira/browse/ISIS-789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153675#comment-14153675
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Dan Haywood commented on ISIS-789:
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Hi Marcel,
The upgrade to DN 4.0 will definitely happen; we recognize it's a blocker to
anyone wanting to use Java 8 for their domain apps (we want to start using Java
8 for that purpose too).
We moved DN 4.0 off the 1.7.0 release because (by request from others in the
community) we are going to support Java 6 for one further release (there are
some security fixes that it will require). I moved DN up to 2.0.0 just to move
it up somewhere, but it didn't get too much consideration... it may well come
back down to the 1.8.0 release.
We are aware of one issue even in a newer release of the DN 3.x codebase,
namely that it now maps certain polymorphic relationships differently. Not
certain whether that was incorrect mapping in our domain app (Estatio) or an
issue with DN, but since we had no immediate business reason to upgrade, we
decided to defer the upgrade and stay on (what is now) quite an old version of
DN.
So, the move to DN 4.0 will need to address that issue for our app, and perhaps
for others too.
Thanks for taking the time to let us know that you want this; it helps us be
responsive to the user community.
Cheers
Dan
> Upgrade to DN 4.0
> -----------------
>
> Key: ISIS-789
> URL: https://issues.apache.org/jira/browse/ISIS-789
> Project: Isis
> Issue Type: Improvement
> Components: Core: Objectstore: JDO
> Affects Versions: objectstore-jdo-1.4.1
> Reporter: Dan Haywood
> Assignee: Dan Haywood
> Priority: Minor
> Fix For: core-2.0.0
>
>
> NB: DN 4.0 only supports Java 7, so this is also dependent on our moving to
> Java 7 across board (see ISIS-568).
> NB: should also check ISIS-647 (fix for
> http://www.datanucleus.org/servlet/jira/browse/NUCCORE-1103).
> - will possibly want to enable to get better perf?
> NB: also know that there's a change to the way that polymorphism works, is
> mapped differently (in Estatio).
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