I use DTOs rather than Gilead...I guess the gilead forums may be able to help.
On 24/03/11 17:51, marky8264 wrote:
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<ukcue...@gmail.com> 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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