On Sep 14, 7:57 pm, jeremy rose <[email protected]> wrote:
> On Sep 14, 6:06 am, leszek <[email protected]> wrote:
>
>
>
>
>
> > Hibernate is not JPA implementation, it exposes its own API.
> > "Hibernate Entity Manager" is a product build on standard Hibernate
> > and offering full JPA interface.
>
> > Google App Engine does not support
> > Hibernate:http://groups.google.com/group/google-appengine-java/web/will-it-play...
> > -----------------
> > Hibernate
> > Versions: All
> > Status: INCOMPATIBLE
>
> > * You cannot currently use Hibernate directly. The differences
> > between the App Engine datastore and SQL were too great to get the
> > standard Hibernate up and running under App Engine. App Engine does
> > support JDO and JPA, so you may be able to convert your Hibernate code
> > to use one of these ORM interfaces.
> > -----------------
>
> I'm using JPA with "Hibernate Entity Manager". So, how can I
> configure App Engine to use my existing JPA backend on a Postgresql
> database? I'm even willing to change the JPA persistence provider
> from "Hibernate Entity Manager" implementation to the Data Nucleus JPA
> implementation but I'm struggling to get the this configured
> properly. Are there any example of folks configuring alternative
> databases with JPA? The documentation I've read so far seems to
> assume (or perhaps dictate) that I'm going to use JDO with Data
> Nucleus.
>
> I just want to get this data storage situation resolved as quickly as
> possible so I can get back to working on a AJAX front end. Currently,
> I don't even plan on marshaling any of my POJOs the client. My AJAX
> client will just use XML to communicate with my servlets.- Hide quoted text -
>
> - Show quoted text -
Additional reading and fumbling around has got me believing my
persistence.xml should more like this (note I changed the provider
classname based on documentation you referred me to --- thanks).
<persistence-unit name="huntingMap">
<provider>org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider</
provider>
<properties>
<property name="datanucleus.storeManagerType" value="rdbms"/>
<property name="datanucleus.ConnectionDriverName"
value="org.postgresql.Driver"/>
<property name="datanucleus.ConnectionURL"
value="jdbc:postgresql://localhost:5432/mydatabasename"/
>
<property name="datanucleus.ConnectionUserName"
value="myusername"/>
<property name="datanucleus.ConnectionPassword"
value="myuserpassword"/>
</properties>
</persistence-unit>
but now I think I need to round-up a datanucleus-rdbms jar but I'm not
sure which release is most compatible with the app-engine pieces I've
already downloaded via the gwt appengine eclipse plugin. I using
postgresql 8.3 if that at all matters. Am I on the right track here?
Any suggestions regarding datanucleus-rdbms versions?
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