[hibernate-dev] Hibernate & Java 5 ?

[Alex Snaps]

Well the interfaces themselves depend on other classes that are not
encapsulated behind interfaces: EntityStatistics,
CollectionStatistics, SecondLevelCacheStatistics and QueryStatistics.
These classes are also modified to use JDK 5 java.util.concurrent
constructs... Choosing what impl. to use at runtime would involve some
small refactoring there as well then...

On Tue, Dec 1, 2009 at 3:59 PM, Steve Ebersole <steve at hibernate.org> wrote:
> I guess I have just been waiting until we can actually leverage 1.5
> features (ala utilize enums or expose generics/typing).  That will not
> happen for 3.5.
>
> Now statistics are encapsulated behind a set of interfaces (Statistics
> and StatisticsImplementor).  We could make this alterable like I did for
> JDBC 3/4 based on the JVM.  That would mean reflection code though.
>
> I do not actually know of any real cases of Hiberate being used in 1.4
> environments today.  So maybe we can just make it 1.5 compatible.
>
> Votes?
>
>
> On Tue, 2009-12-01 at 14:38 +0100, Alex Snaps wrote:
>> We've been doing some improvement to the Hibernate statistics at
>> Terracotta, when we realized how much the synchronization on it was
>> impacting throughput in our tests.
>> That is work we wanted to contribute back to you guys, should
>> Hibernate Core be target at 1.5. As it seems that's not yet the case,
>> so there isn't much you guys will be able to do with these changes...
>> We discussed about that at Devoxx with Max and Emmanuel and thought it
>> was okay to have 1.5 impl. of the specs (java.util.concurrent based)
>> already. Apparently not :( What timeframe do you see 1.4 support being
>> dropped?
>>
>> On Tue, Dec 1, 2009 at 1:44 PM, Steve Ebersole <steve at hibernate.org> wrote:
>> > I have issues reloading Maven-based projects in IntelliJ as well.  I
>> > simply try to minimize the number of times I reload.
>> >
>> > Hibernate is *built* with JDK 1.5, but not all the modules are 1.5
>> > compatible.
>> >
>> > What "statistics work" discussion?  I must have missed that.  But for
>> > sure the hibernate-core module should remain 1.4 compatible.  Dropping
>> > 1.4 support is on the roadmap, but not for 3.5
>> >
>> >
>> > On Tue, 2009-12-01 at 11:32 +0100, Alex Snaps wrote:
>> >> Hey,
>> >> Doing a svn update of the Hibernate trunk, I realized I probably had
>> >> changed the project to be Java5 manually as it reverted to 1.4
>> >> (because of some pom.xml change) in IntelliJ.
>> >> Talking to Max and Emmanuel at Devoxx I thought trunk was now to be
>> >> Java 5? Is this not the case after all, or are poms only update when
>> >> the first Java5 language/jdk feature sneaks in?
>> >> As discussed we discussed, all the statistics work heavily rely on
>> >> java.util.concurrent classes, so that is "more or less" important for
>> >> that patch...
>> >> Btw do you guys have a contributor agreement somewhere, I couldn't find it.
>> >> Thanks,
>> >> Alex
>> >>
>> > --
>> > Steve Ebersole <steve at hibernate.org>
>> > Hibernate.org
>> >
>> >
>>
>>
>>
> --
> Steve Ebersole <steve at hibernate.org>
> Hibernate.org
>
>



-- 
Alex Snaps <alex.snaps at gmail.com>
Software Engineer - Terracotta
http://twitter.com/alexsnaps
http://www.linkedin.com/in/alexsnaps