Hi Armin,
Here's is a schematic example :
Consider a service method that returns an object "ProductBean". ProductBean
is not O/R mapped but the reading calls a second method that read O/R
mapped Product object. Then, relations are followed, to find description of
his Category (Consider that a product have 1 Category.
2nd method looks like that (classic):
public static Product getProduct(String id) {
PersistenceBroker broker = null;
try {
PersistenceBroker brojer =
PersistenceBrokerFactory.defaultPersistenceBroker();
Identity oid = broker.serviceIdentity().buildIdentity(Product.class,
id);
Product product = (Product) broker.getObjectByIdentity(oid);
return product;
} finally {
if (broker !=null )
{ broker.close();
}
}
}
Frst method looks like that :
public static ProductBean getProductBean(String id)
{ Product p = getProduct(id); // 2nd method call
if (p!=null)
{ ProductBean product = new ProductBean();
product.setDescription(p.getDescription());
product.setID(p.getId());
// and here's the O/R recall
product.setCategoryDescription( p.getCategory().getDescription() );
// now, broker is open... how does it close ?
return product;
}
return null;
}
I tried to wrap the code of first method with a tx.open() and tx.abort(), to
be sure that broker is released at the end with the abort().
thanks
regards.
On 4/25/06, Armin Waibel <[EMAIL PROTECTED]> wrote:
>
> Hi Bruno,
>
> Bruno CROS wrote:
> > Hi,
> >
> > It seems that read objects with a broker, can read related objects by
> > auto-retrieve set to "true" despite broker is closed.
>
> I can't see what you mean. When OJB materialize an object with related
> objects and auto-retrieve is 'true', the full materialized object is
> returned. Thus it's not possible to close the PB instance while object
> materialization (except by an illegal concurrent thread).
>
> Or do you mean materialization of proxy references? In this case OJB try
> to lookup the current PB instance and if not found internally a PB
> instance is used for materialization and immediately closed after use.
>
> Could you please describe more detailed (with example code)?
>
> regards,
> Armin
>
> > I suppose that a getDefaultBroker is done, and the borrowed broker is
> never
> > closed (because no reference on it).
> > Note : This occurred because, application has been written with several
> > layers, one for dao, one for services, one for UI.
> >
> > How can i avoid "auto-retrieves" readings to take brokers in the PBPool
> by
> > themselves ?
> >
> > Thanks.
> >
>
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