thanks for your answer.
However, if i use a eager loading for the list, i will get this:
Caused by: com.google.gwt.user.client.rpc.SerializationException: Type
'org.hibernate.collection.PersistentBag' was not included in the set
of types which can be serialized by this SerializationPolicy or its
Class object could not be loaded. For security purposes, this type
will not be serialized.: instance = []
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:
614)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:
126)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:152)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:
534)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass(ServerSerializationStreamWriter.java:
704)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:
734)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:
616)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:
126)
at
com.google.gwt.user.client.rpc.core.java.util.Map_CustomFieldSerializerBase.serialize(Map_CustomFieldSerializerBase.java:
52)
at
com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerializer.serialize(HashMap_CustomFieldSerializer.java:
38)
... 76 more
Although i use Gilead, i get this exception. I thought that Gilead
will clone the entity object and replace the hibernate collections
with normal collections.
Why do i get this exception?
Is it possible that this is the reason:
[...]
24 Mär 2011 16:43:38,695 DEBUG PersistentBeanManager: Not persistent
object, merge is not needed : 1
24 Mär 2011 16:43:38,696 DEBUG GileadRPCHelper: Merge took 92 ms.
24 Mär 2011 16:43:38,979 TRACE HibernateUtil : Exception during
getCurrentSession
org.hibernate.HibernateException: No Hibernate Session bound to
thread, and configuration does not allow creation of non-transactional
one here
at
org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:
63)
at
org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:
700)
at
net.sf.gilead.core.hibernate.HibernateUtil.getCurrentSession(HibernateUtil.java:
1829)
at
net.sf.gilead.core.hibernate.HibernateUtil.flushIfNeeded(HibernateUtil.java:
975)
at
net.sf.gilead.core.PersistentBeanManager.clone(PersistentBeanManager.java:
227)
at
net.sf.gilead.gwt.GileadRPCHelper.parseReturnValue(GileadRPCHelper.java:
157)
[...]
Here my gilead config:
<bean id="proxySerializer"
class="net.sf.gilead.core.serialization.GwtProxySerialization"
/>
<bean id="proxyStore"
class="net.sf.gilead.core.store.stateless.StatelessProxyStore">
<property name="proxySerializer" ref="proxySerializer" />
</bean>
<bean id="persistenceUtil"
class="net.sf.gilead.core.hibernate.jpa.HibernateJpaUtil">
<property name="entityManagerFactory"
ref="entityManagerFactory" /
>
</bean>
<bean id="persistentBeanManager"
class="net.sf.gilead.core.PersistentBeanManager">
<property name="proxyStore" ref="proxyStore" />
<property name="persistenceUtil" ref="persistenceUtil" />
</bean>
On 24 Mrz., 18:31, Paul Robinson <[email protected]> wrote:
> Your collection is mapped as lazy, which means hibernate will load data on
> demand rather than up-front. However, you then try and access the collection
> outside a hibernate session, so it cannot do the load.
>
> You should either load what you need inside the hibernate session, or make
> your collection be non-lazy.
>
> On 24/03/11 14:50, marky8264 wrote:
>
>
>
>
>
>
>
> > hey,
> > I'm a newbie with these frameworks. Firstly i want to write a small
> > web app with gwt for the frontend, spring for backend and jpa for the
> > persistence operations. I use Hibernate as JPA implementation.
>
> > I started with a simple construction (2 simply entities, 2 DAO,1
> > remote service). I have no problems with this example. After i had
> > extended the entities with lists, i got some problems with the lazy
> > loading and serialization. Therefore i searched for solution and found
> > the Gilead Framework.
>
> > Now i have following problem:
> > org.hibernate.LazyInitializationException: failed to lazily initialize
> > a collection of role:<list attribute of my class>, no session or
> > session was closed
> > at
> > org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:
> > 383)
> > at
> > org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:
> > 375)
>
> > I don't understand the problem, because i marked the service method
> > with @Transactional(propagation=Propagation.NESTED, readOnly=true).
> > What is the cause of my problem?
> > thanks in advance
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