This may help
http://code.google.com/p/pgae-examples/source/browse/1e/java/ch08/queries/src/queries/JPAQueriesServlet.java
On Jan 26, 6:13 pm, BlueBlood <eagleeye8...@gmail.com> wrote:
> Hi there,
> I'm a newbie with GAE, I'm using JPA to access datastore and I'm
> having a problem querying datastore.
>
> I have successfully inserted a few record into datastore using JPA but
> I can not read them back from datastore.
> Following is my code to query datastore.
>
> ------------------------------------------------------------------
> EntityManager em = EMF.get().createEntityManager();
> Query query = em.createQuery("select t from
> com.test.dataschema.User_JPA as t");
> List<User_JPA> result = query.getResultList();
>
> ------------------------------------------------------------------
> EMF class definition:
>
> package com.fineart.dataschema;
> import javax.persistence.EntityManagerFactory;
> import javax.persistence.Persistence;
>
> public final class EMF {
>
> private static final EntityManagerFactory emfInstance =
> Persistence.createEntityManagerFactory("transactions-
> optional");
>
> private EMF() {}
>
> public static EntityManagerFactory get() {
> return emfInstance;
> }}
>
> ------------------------------------------------------------------
>
> I would be so grateful if someone help me out.
> Thanks.
--
You received this message because you are subscribed to the Google Groups
"Google App Engine" group.
To post to this group, send email to google-appeng...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine?hl=en.
