On Jul 17, 2007, at 4:31 PM, Ate Douma wrote:
<giant snip>
- Jetspeed "light" (no need for database persistence and much
simplified page/site management)
- I think that moving to jpa for persistence would be a good
idea. I think moving to java(ee)5 is reasonable too, but it may
be possible to use openjpa in a 1.4 environment (I'm not sure). At
least if we can move to java 5 I think I can help with this.
With the planned support for JSR-286 Portlet API 2.0, which
requires Java 5 too, leaving 1.4 behind is one of the consequences.
About moving to JPA: yes. I'm all for replacing OJB with either JPA
or JDO2.
Personally, I think JPA still has a long way to go before it can
match JDO2, and JPA has some severe limitations too.
That could well be the case, and I've heard that from other people,
but jpa has some big advantages in terms of availability -- there are
openjpa, toplink, and hibernate all for free whereas AFAIK the only
free jdo2 implementation is the RI. (IMO the reason jpa is here is
that there weren't any good, available, community backed, free jdo1
implementations, opening the door to hibernate...)
If we can be sure enough JPA can cover our needs though and be
performant too, its OK with me.
I'd be rather surprised if moving to openjpa didn't speed things up :-)
But please note: what I proposed above for a Jetspeed "light"
actually is (also to) separate out database persistence altogether
by factoring out those dependencies from our component model so we
can also provide an memory or xml/file based storage model.
I'll try not to get ahead of myself here :-). That seems like a good
idea but lets also be careful of introducing more layers than we need.
I wonder if we can have some pojo data objects, with both jpa and
jaxb annotations, then use the classes with jpa for db storage and
jaxb for xml storage.... and nothing for in memory...
thanks
david jencks
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