Re: [eclipselink-users] Cacheing non-root entities

[Tom Ware <tom.ware@xxxxxxxxxx>]

Further investigation, shows that making the superclass non-cacheable will 
automatically make subclasses non-cacheable.  Sorry for any confusion.

Non cacheable entries in EclipseLink are labeled protected.  What that means is 
that they do not appear in the shared cache, but are cached at the EntityManager 
level.

-tom

On 06/06/2013 10:24 AM, Tom Ware wrote:
> Hi Andreas,
>
>    I have not tried this, but after discussing with a colleague, we think that
> this configuration should work.  Doing things this way would create some
> limitations on using things like EclipseLink's in-memory querying feature, but
> as long as you are not specifically using it we think you will be ok.
>
> -Tom
>
> On 05/06/2013 4:08 AM, Andreas Joseph Krogh wrote:
> > I would like to cache, with @Cacheable, non-root entities.
> > Say you have this model:
> >
> > @Entity
> > @Table(name =*"parent"*)
> > @Inheritance(strategy = InheritanceType.JOINED)
> > @DiscriminatorColumn(name =*"type"*, discriminatorType =
> > DiscriminatorType.STRING)
> > @SequenceGenerator(name =*"SEQ_STORE"*, sequenceName =*"entity_id_seq"*,
> > allocationSize =1)
> > *abstract class**AbstractEntityObject*  {
> >
> > @Entity
> > @Table(name =*"child"*)
> > @PrimaryKeyJoinColumn(name =*"entity_id"*)
> > @DiscriminatorValue(*"PERSON"*)@Cacheable  /// This does not work in Hibernate
> > because we're not the Root-entity/
> > *class**Person*  *extends**AbstractEntityObject*
> >
> > I want to cache /inherited/ entities of AbstractEntityObject but am unable to do
> > so in Hibernate because Hibernate only allows the root-entity,
> > AbstractEntityObject, to be cached.
> > Is this according to spec or a Hibernate-limitation? Is this possible in
> > EclipseLink? The point is that I don't want to cache *all* inherited entities of
> > AbstractEntityObject.
> > Thanks.
> > --
> > Andreas Joseph Krogh <andreak@xxxxxxxxxxxx>      mob: +47 909 56 963
> > Senior Software Developer / CTO - OfficeNet AS - http://www.officenet.no
> > Public key: http://home.officenet.no/~andreak/public_key.asc
> >
> >
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