Hi all,

I have a object/object (sucessor relation) and i would like to create a new successor automatically when object is updated and update one property of object to fix the new successor.

So when event occured i do :

successor = new Object() ;
// fill properties of successor
object.setSuccessor(successor);

and save these two objects in one transaction.

I try to use Hibernate Event listeners but i can't save the two objects.
I read http://opensource.atlassian.com/project ... e/HHH-1241
and http://forum.hibernate.org/viewtopic.ph ... 84#2275484.

I don't know how to update object and create new one and associate it to the previous with two hibernate sessions.

Someone has any suggestions ?

Hibernate Event Listeners is not very well documented.

Thank you,

Sébastien Boutté

I try to code :

public boolean onPreUpdate(PreUpdateEvent event) {
System.out.println("onPreUpdate");
try {
if (event.getEntity() instanceof PersistentObjectImpl) {
PersistentObjectImpl po = (PersistentObjectImpl) event.getEntity();
if (po.getId() != null) {
ClassMetadata metaData = event.getPersister().getFactory().getClassMetadata(po.getClass());
String[] properties = metaData.getPropertyNames();
Object[] oldValues = event.getOldState();
Object[] newValues = metaData.getPropertyValues(event.getEntity(),EntityMode.POJO);
Session s = event.getPersister().getFactory().openSession(event.getSource().connection());
//Object copy = s.load(po.getClass(),po.getId());
PersistentObjectImpl ancestor = (PersistentObjectImpl) EcaBusinessObject.createBusinessObject(po.getClass(), oldValues, properties);
//ancestor.addSuccesseur((PersistentObjectImpl) copy);
s.save(ancestor);
s.flush();


PersistentObjectImpl copy = (PersistentObjectImpl) event.getSource().internalLoad(ancestor.getClass().getName(),ancestor.getId(),false,false);
//copy.addSuccesseur(po);
po.setPredecesseur((PersistentObjectImpl) copy);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}

i i remove the line :
po.setPredecesseur((PersistentObjectImpl) copy);
i can insert the sucessor in the database but not the link with the object.

but if not i have the exception :

GRAVE: an assertion failure occured (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session)
org.hibernate.AssertionFailure: collection was not processed by flush()
at org.hibernate.engine.CollectionEntry.postFlush(CollectionEntry.java:183)
at org.hibernate.event.def.AbstractFlushingEventListener.postFlush(AbstractFlushingEventListener.java:328)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:28)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1009)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:356)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)