One thing you can do (per your application use-case
scenario) is to initialize those collections and
objects that you need using the
Hibernate.initialize(Object object) method.
For example, in my hibernate components, when I load
the object from the database, I will fetch those
collections up front:
Product product = (Product)
session.load(Product.class,
new Long(productId));
Hibernate.initialize(product);
//Hibernate.initialize(product.getCurrentPrice());
Hibernate.initialize(product.getShipmentClass());
Hibernate.initialize(product.getShipmentClass().getShippingMethods());
Hibernate.initialize(product.getAttributes());
Hibernate.initialize(product.getPrices());
Hibernate.initialize(product.getProductReviews());
-Phillip Rhodes
http://www.rhoderunner.com
http://www.jsso.org
--- Chris Chiappone <[EMAIL PROTECTED]> wrote:
> I have been developing an application using tapestry
> 3.0.3 and
> hibernate 3.0.2. Took a while to get everything
> working correctly,
> and learning both of the frameworks. I have a
> decent amount of the
> application written and now am running into
> LazyInitializationException in certain places. Its
> strange because I
> can't expain why I get the exception and other times
> I don't.
>
> I've read that using the Spring Framework would fix
> this problem, but
> wonder if its worth learning another framework and
> trying to integrate
> it into my application. I'm on a deadline and this
> may just take to
> long. I've also extended BaseEngine to do this
> trying to relieve my
> problem:
>
>
> protected void
> cleanupAfterRequest(IRequestCycle cycle) {
> try {
>
>
> HibernateUtil.commitTransaction();
>
> if (killSession) {
> try {
> HttpSession
> session =
> cycle.getRequestContext()
>
> .getSession();
>
> if (session
> != null) {
>
> log.info("Logging out user.");
>
> session.invalidate();
> }
> } catch
> (IllegalStateException ex) {
> // Ignore.
> }
>
> }
> } catch (NestedRuntimeException nre)
> {
>
> } finally {
>
> HibernateUtil.closeSession();
> }
> }
> Yet I still run into this exception:
>
> Unable to resolve expression 'currentCompany.name'
> for
>
[EMAIL PROTECTED]
> binding: ExpressionBinding[EditProfile
> currentCompany.name]
> location: context:/WEB-INF/EditProfile.page, line
> 41, column 65
>
> ognl.OgnlException
> name
>
> org.hibernate.LazyInitializationException
> could not initialize proxy - the owning Session was
> closed
> messages: [Ljava.lang.String;@cdf872
> throwableCount: 1
> throwables: [Ljava.lang.Throwable;@7227a8
> Stack Trace:
>
org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:53)
>
org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:84)
>
org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:134)
>
domain.company.Company$$EnhancerByCGLIB$$f029e618.getName(<generated>)
>
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>
>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> java.lang.reflect.Method.invoke(Method.java:585)
>
>
> Is there anything else I should try. Or is the
> spring framework the
> way to go. If so is it easy to integrate into an
> existing
> applicatoin? Thanks.
> --
> ~chris
>
>
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