NOTE: There will be no meeting next week, April 29 2011
Attendees: Michelle Caisse, Michael Bouschen, Craig Russell
Agenda:
1. Typesafe queries for JDOQL - discussion.
https://issues.apache.org/jira/browse/JDO-652
Annotation tool DataNucleus bug filed and fixed.
What dependencies are introduced by the annotation processor? The "Q"
classes generated by DataNucleus extend PersistableExpressionImpl.
There would need to be an equivalent JDO standard class to extend. The
candidate() method would need to return an implementation-specific
instance that implements a JDO standard interface.
Michael has modified the tck project to be able to test the new query
feature. AI Michael send a patch so we can see how to do it.
Ideally, the typesafe query could be created by the pmf and only bound
to the pm when it needs to become stateful (range, parameters,
timeout). But this would mean that there needs to be another method to
create a bound query from a query definition, which might be awkward
(not as easy to use).
Is the current Query really stateless? What about range, timeout, and
read-only? These are state of the query instance. You might consider
read-only to be part of the query definition but it's hard to not
think of range and timeout along with query parameters as anything but
state.
The current Query was created long before annotations, generics,
autoboxing, and variable parameters. Some of its core architecture
looks a bit old without these features. But there are many good things
about it as well that we should try to incorporate into the typesafe
query pattern.
2. Other issues
It looks like there is substantial work remaining on query. Should we
look at making a release 3.1 and query for 3.2?
The tck doesn't work with Michelle's Windows 7 machine. Holding up the
exectck maven2 checkin.
Action Items from weeks past:
[April 8 2011] AI Craig comment on https://issues.apache.org/jira/browse/JDO-617
re the utility of the update operator.
[Feb 25 2011] AI Michael, Craig, other volunteers: Look at
Typesafe ... query capability for JDOQL https://issues.apache.org/jira/browse/JDO-652
Craig L Russell
Architect, Oracle
http://db.apache.org/jdo
408 276-5638 mailto:craig.russ...@oracle.com
P.S. A good JDO? O, Gasp!
