Hi,
The JNDI lookup just done for you in normal JavaEE setup as well.
So I think your code is OK.
On Mon, Oct 8, 2012 at 6:24 PM, Dieter Tremel <tre...@tremel-computer.de> wrote:
> I found a different solution I would like to post for discussion:
> I encapsulated the Facade in a LoadableDetachableModel like this:
>> /**
>> * Model for JPA facade beans.
>> * @author Dieter Tremel <tre...@tremel-computer.de>
>> */
>> public class EntityFacadeModel<E extends JPAEntity> extends
>> LoadableDetachableModel<AbstractFacade<E>> {
>>
>> private Class<? extends JPAEntity> entityClass;
>>
>> public EntityFacadeModel(Class<? extends JPAEntity> entityClass) {
>> this.entityClass = entityClass;
>> }
>>
>> @Override
>> protected AbstractFacade<E> load() {
>> AbstractFacade<E> result = null;
>> try {
>> InitialContext ctx = new InitialContext();
>> result = (AbstractFacade<E>) ctx.lookup("java:module/" +
>> entityClass.getSimpleName() + "Facade");
>> } catch (NamingException ex) {
>>
>> Logger.getLogger(EntityFacadeModel.class.getName()).log(Level.SEVERE, null,
>> ex);
>> }
>> return result;
>> }
>> }
>
> I hope the JNDI lookup is a not too expensive operation, is it?
>
> In the page I build this like:
>> EntityDataProvider<Buch> buchProvider = new EntityDataProvider<>(new
>> EntityFacadeModel<Buch>(Buch.class));
>> DefaultDataTable<Buch, String> dTable = new
>> DefaultDataTable<>("datatable", columns, buchProvider, 10);
>
> And in the EntityDataProvider I have overwritten:
>> @Override
>> public void detach() {
>> facadeModel.detach();
>> super.detach();
>> }
>
> As a result there are no serialization errors in my trial. The lookup
> will be called once per request.
>
> What do you think?
> Dieter
>
>
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