hi, we are using Hibernate 3.4. We use no Spring Managed Transaction Manager at this moment in OpenMeetings. We we have a lot of HQL Queries in the our OM-Layer. I read that ... I think I better switch to the openJPA mailing list as I do have a lot of questions regardign migration in detail.
thanks, sebastian 2009/11/19 Donald Woods <[email protected]> > Jay points out an important design feature, in that if you write to the JPA > 1.0 or 2.0 spec API and don't use any provider specific extensions or > behaviors, then you can easily allow your users to choose a different > provider (based on performance, familiarity, ...) or depend upon the one > provided in a Java EE app server. > > As a OpenJPA committer, I'm partial to it :-) > > The first migration question would be, what version of Hibernate are you > using now, as moving from v3 to OpenJPA would be pretty straightforward. BTW > - anyone trying to migrate from Hibernate to OpenJPA would receive lots of > help on our user list... > > > -Donald > > > > Jay D. McHugh wrote: > >> Hello Alexei, >> >> If you are using Hibernate now - then it should not be too much trouble >> to switch to use OpenJPA (unless you are using some of Hibernate's >> enhancements to the JPA spec). >> >> At least that would be my understanding. I have used OpenJPA and love >> it but have never used Hibernate. >> >> Jay >> >> Alexei Fedotov wrote: >> >>> Hello, >>> As for migrating from Hibernate, I see several alternatives for >>> persistence. >>> Enterprise Java experts, please, could you comment on this? >>> >>> 1. stackoverflow.com suggested using Spring as a persistence technology. >>> My >>> friend said that it requires coding, but you get manageable, clear and >>> transparent application. We already use Spring as a dependency. >>> >>> 2. Using JPA from Java 6 JPA allows using less libraries and being more >>> compatible with Google App Engine. The latter may help general users to >>> host >>> the web application. >>> >>> 3. Does OpenJPA suggested by Niclas offer any benefits compared to JPA? >>> Synergy is good, but there may be other benefits I cannot see. Sorry for >>> my >>> ignorance. >>> >>> Thanks. >>> P.S. Ross, it would be really nice to get you as a mentor. >>> On Wed, Nov 18, 2009 at 6:56 PM, Ross Gardler <[email protected]> >>> wrote: >>> >>> 2009/11/18 Sebastian Wagner <[email protected]>: >>>> >>>>> we would like to propose Openmeetings project to join the incubator. >>>>> >>>>> Full Proposal: >>>>> http://wiki.apache.org/incubator/OpenmeetingsProposal >>>>> >>>> Calling a vote is premature. Therefore my vote is -1. >>>> >>>> Your proposal does not yet have a confirmed champion and you don't >>>> have sufficient mentors yet. >>>> >>>> I'm still toying with the idea of mentoring, but I'm still unclear >>>> with respect to the legal situation. I've not seen a clear consensus >>>> that it will ever be possible to produce a cleanly licensed >>>> application that does not require the use of LGPL/GPL code. >>>> >>>> Ross >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: [email protected] >>>> For additional commands, e-mail: [email protected] >>>> >>>> >>>> >>> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >> >> > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- Sebastian Wagner http://www.webbase-design.de http://openmeetings.googlecode.com http://www.laszlo-forum.de [email protected]
