Have a look at GILEAD for JPA / JDO on App Engine:
http://turbomanage.wordpress.com/2009/10/15/gwt-gae-and-the-balm-of-gilead/

Also, Objectify-appengine provides emulation for Key and related
classes so that POJOs can be used with GWT.
http://code.google.com/p/objectify-appengine/

HTH,
--
David Chandler
Developer Programs Engineer, Google Web Toolkit
Atlanta, GA USA


On Oct 7, 3:19 pm, Will <[email protected]> wrote:
> Hi,
>
> I'm constructing a POJO (Employee) on teh client side and trying to
> make persistent in teh datastore.
> So that both client and sever can see this class i place it in the /
> shared folder and annotate the object as suggested by tutorials for
> persistence...
>
> @PersistenceCapable
> public class Employee {
>     @PrimaryKey
>     @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
>     private Key key;
>
> etc.
>
> The problem as some of you are probably predicting is GWT (not Java)
> throws an exception and cannot import com.google.appengine when it
> tries to import the Key.
>
> the import com.google.appengine cannot be resolved
>
> I've seen various hacks and solutions around this  issue in this
> group, on forums and on blogs...none of which are too pretty...
>
> from super-src  hack to maintaining client and server object clones..
> (double classes) and so on...
> e.ghttp://fredsa.allen-sauer.com/2009/04/1st-look-at-app-engine-using-jd...
>
> Does this issue still require a 'hacky' solution or is there a more
> elegant solution available now?
>
> Thanks...

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