It looks a little like the RequestVar has had its lifecycle closing hook
called by the time you call getSubscriptions
Try touch/get the subscriptions before you pass them into the bind.
cheers
Oliver
On Tue, Sep 9, 2008 at 7:31 AM, Kris Nuttycombe
<[EMAIL PROTECTED]>wrote:
>
> I've been following the advancement of the JPA/Lift tutorial with
> great interest, and have managed to get my app working, but I'm now
> struggling with a problem that occurs whenever I try to retrieve a
> collection that is mapped as a lazy association:
>
> Exception occured while processing /orders/list
>
> Message: org.hibernate.LazyInitializationException: failed to lazily
> initialize a collection of role:
> com.gaiam.gcsi.entities.subscription.Order.subscriptions, no session
> or session was closed
>
>
> org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
>
>
> org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
>
>
> org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:97)
> org.hibernate.collection.PersistentBag.size(PersistentBag.java:225)
> com.gaiam.gcsi.snippet.Orders$$anonfun$list$1.apply(Orders.scala:21)
> com.gaiam.gcsi.snippet.Orders$$anonfun$list$1.apply(Orders.scala:18)
> scala.Seq$class.flatMap(Seq.scala:267)
> com.gaiam.gcsi.model.EM$$anon$1.flatMap(EM.scala:11)
> com.gaiam.gcsi.snippet.Orders.list(Orders.scala:18)
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> ...
>
> I took the simplest-possible route of encapsulating the EntityManager
> in a RequestVar per Derek's suggestion as such:
>
> object EM {
> def entityManager() = (new
>
> InitialContext()).lookup("java:comp/env/persistence/em").asInstanceOf[EntityManager]
> }
>
> class Orders {
> object em extends RequestVar(entityManager())
>
> def list(xhtml: NodeSeq) : NodeSeq = {
> val orders = em.createQuery("from
> Order").getResultList().asInstanceOf[java.util.List[Order]]
> orders.flatMap(order =>
> bind("order", xhtml,
> "id" --> Text(order.getId().toString),
> "count" --> Text(order.getSubscriptions().size().toString)))
> }
> }
>
> The issue appears to be that the transaction that the the query ran in
> is no longer active by the time of the call to
> order.getSubscriptions(). Has anyone else been using JTA and
> encountered this? I'm running the latest stable Glassfish (2.1 UR2)
> and using Hibernate for the persistence layer.
>
> Thanks,
>
> Kris
>
> >
>
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