> On Apr 13, 9:27 pm, datanucleus <andy_jeffer...@yahoo.com> wrote:

> > Why not raise a bug onhttp://code.google.com/p/datanucleus-appengine/
> > since DataNucleus itself provides mechanisms for reading in of query
> > results when a transaction commits. It's likely just not yet
> > implemented in the plugin yet

> public List<Product> getAllProducts() {
>         String query = "select description, price from
> springapp.domain.Product";
>         List<Product> allProducts = (List<Product>)
> entityManager.createQuery(query).getResultList(); // debug: Method
> threw 'org.datanucleus.exceptions.NucleusUserException' exception.
>         allProducts.size(); // debug:
> org.datanucleus.exceptions.NucleusUserException: Object Manager has
> been closed
>         return allProducts;
>     }

> At first I thought maybe I haven't set up my entityManager etc
> properly (new to Spring) however, finding a product by Id works...so
> I'm not quite sure what is happening.

>     public Product getProductWithId(int id) {
>         Product product = entityManager.find(Product.class, id);
>         return product;
>     }

> Any help will be great. Thanks!

> On Apr 14, 1:46 am, tha <hathanht...@gmail.com> wrote:

> > Submitted a ticket athttp://code.google.com/p/datanucleus-appengine/issues/detail?id=24

> > On Apr 13, 9:27 pm, datanucleus <andy_jeffer...@yahoo.com> wrote:

> > > Why not raise a bug onhttp://code.google.com/p/datanucleus-appengine/
> > > since DataNucleus itself provides mechanisms for reading in of query
> > > results when a transaction commits. It's likely just not yet
> > > implemented in the plugin yet

> On Apr 18, 8:29 am, pyko <psychop...@gmail.com> wrote:

> > I am also having problems with getResultList() giving
> > NucleusUserException error. I've tried calling size() as suggested
> > here, but it doesn't seem to work. Like tha I'm using Spring as well.

> > public List<Product> getAllProducts() {
> >         String query = "select description, price from
> > springapp.domain.Product";
> >         List<Product> allProducts = (List<Product>)
> > entityManager.createQuery(query).getResultList(); // debug: Method
> > threw 'org.datanucleus.exceptions.NucleusUserException' exception.
> >         allProducts.size(); // debug:
> > org.datanucleus.exceptions.NucleusUserException: Object Manager has
> > been closed
> >         return allProducts;
> >     }

> > At first I thought maybe I haven't set up my entityManager etc
> > properly (new to Spring) however, finding a product by Id works...so
> > I'm not quite sure what is happening.

> >     public Product getProductWithId(int id) {
> >         Product product = entityManager.find(Product.class, id);
> >         return product;
> >     }

> > Any help will be great. Thanks!

> > On Apr 14, 1:46 am, tha <hathanht...@gmail.com> wrote:

> > > Submitted a ticket athttp://code.google.com/p/datanucleus-appengine/issues/detail?id=24

> > > On Apr 13, 9:27 pm, datanucleus <andy_jeffer...@yahoo.com> wrote:

> > > > Why not raise a bug onhttp://code.google.com/p/datanucleus-appengine/
> > > > since DataNucleus itself provides mechanisms for reading in of query
> > > > results when a transaction commits. It's likely just not yet
> > > > implemented in the plugin yet

> Today I got this error "NucleusUserException: Object Manager has been
> closed" in my Spring application. Basically, my application loads some
> objects in DAO classes, close the transaction (using Spring declared
> transactions)  and returns the result to View layer. But when I access
> the objects' properties, I got the error. After looking at the
> GetFlights.java file (helloorm demo, GAE SDK), I see that the size()
> method must be called before closing the transaction. So I changed my
> DAO method to:

> public List<T> findAll() {
>         List<T> results = entityManager.createQuery("select o from "
>                         + getPersistentClass().getName() + " o").getResultList();
>         results.size(); // In JPA apps, we don't need this call!!
>         return results;

> }

> It is working now. But I don't like the idea to call the size()
> method. In theory, a JPA application must work with any JPA-compliant
> provider. And a JPA application doesn't call size() method just to
> load the results from query. So I believe that (DataNucleaus +
> appengine plugin) is not a JPA-compliant provider. Please correct me
> if I'm wrong.

> Thai

> Exact same problem here without spring.

> It's solved with your "trick", so this is a bug ?

> Regards.

> On 13 avr, 16:01, tha <hathanht...@gmail.com> wrote:

> > Hi all,

> > Today I got this error "NucleusUserException: Object Manager has been
> > closed" in my Spring application. Basically, my application loads some
> > objects in DAO classes, close the transaction (using Spring declared
> > transactions)  and returns the result to View layer. But when I access
> > the objects' properties, I got the error. After looking at the
> > GetFlights.java file (helloorm demo, GAE SDK), I see that the size()
> > method must be called before closing the transaction. So I changed my
> > DAO method to:

> > public List<T> findAll() {
> >         List<T> results = entityManager.createQuery("select o from "
> >                         + getPersistentClass().getName() + " o").getResultList();
> >         results.size(); // In JPA apps, we don't need this call!!
> >         return results;

> > }

> > It is working now. But I don't like the idea to call the size()
> > method. In theory, a JPA application must work with any JPA-compliant
> > provider. And a JPA application doesn't call size() method just to
> > load the results from query. So I believe that (DataNucleaus +
> > appengine plugin) is not a JPA-compliant provider. Please correct me
> > if I'm wrong.

> > Thai