What is the impact of your proposal on people who are using Sun-ish
1.6 VMs, which have on-the-fly class redefinition support?
Put another way, to what extent have you considered the differences in
flakiness between the 1.5-friendly subclassing approach and the 1.6-
needing redefinition approach?
-Patrick
On Dec 4, 2008, at 4:25 PM, Kevin Sutter wrote:
Hi,
This is a tough decision, but one that I think we need to make. If
you have
been following the dev mailing list, there have been several
discussions [1]
and JIRA Issues [2] about the fallback enhancement by subclassing
that we
put in place back in the 1.0.0 timeframe. Although we succeeded in
making
the initial out-of-box experience easier for the newbie OpenJPA
developer,
we also masked the need for true enhancement for production usage.
So,
unless we deem that this subclassing enhancement is critical to
OpenJPA's
acceptance and usage, I propose to turn this option off by default.
The
ability to do this subclass enhancement will still be available via
the
openjpa.RuntimeUnenhancedClasses property, but the default will now be
either "warn" or "unsupported" instead of "supported". I would like
to do
this for trunk for sure and possibly the 1.3.x branch as well.
Please vote
accordingly. Thanks for your input. Write-in comments are also
welcome.
[ +1 | 0 | -1 ] Turn off subclass enhancement in trunk
[ +1 | 0 | -1 ] Turn off subclass enhancement in 1.3.x
I am not proposing to turn it off in the other branches since those
are not
active development streams, but rather service streams. We shouldn't
introduce a change like this into a customer's service stream. That
is, for
a customer to get 1.0.4 with this option turned off would be a
surprise
since they would only be expecting fixes. Fine line in this case,
but you
get the picture.
Thanks,
Kevin
[1]
http://n2.nabble.com/Re%3A-Foreign-key-field-doesn%27t-get-populated-in-descendant-class-in-Join-Inheritance-td1574111.html#a1574493
[2] http://issues.apache.org/jira/browse/OPENJPA-651,
http://issues.apache.org/jira/browse/OPENJPA-650,
https://issues.apache.org/jira/browse/OPENJPA-293
--
Patrick Linskey
202 669 5907
