Every time I delete an object (with a particular property setted) i need to:

1) create another object (using same Hibernate Session)
2) log operation with log4j
3) serialize object in a file system archive

How can I do this things with hibernate events?

Hi
You need a cutom event listener like this
import org.hibernate.HibernateException;
import org.hibernate.event.DeleteEvent;
import org.hibernate.event.DeleteEventListener;
import org.hibernate.event.def.DefaultDeleteEventListener;

public class MyDeleteEventListener extends DefaultDeleteEventListener implements DeleteEventListener {

static final long serialVersionUID = -7260150090076059849L;

public void onDelete(DeleteEvent event) throws HibernateException {

//TODO

super.onDelete(event);
}

}


And you need to register the Listener like this
configuration = new Configuration();
SessionEventListenerConfig eventListenerConf = configuration.getSessionEventListenerConfig();
eventListenerConf.setDeleteEventListener(new MyDeleteEventListener());
sessionFactory = configuration.configure().buildSessionFactory();


Any piece of code you want to impl can be done in the onDelete method of the listener.
Hope this helps

in ondelete event how can I use current HibernateSession?

Current session can be obtained if you are using a Session Handler with a threadlocal implemented
private static final ThreadLocal threadSession = new ThreadLocal();
public static Session currentSession() {

log.debug("Entering method HibernateUtil:currentSession");

Session s = (Session) threadSession.get();
try {
if (s == null) {
log.debug("Opening new Session for this thread.");
if (getInterceptor() != null) {
log.debug("Using interceptor: "
+ getInterceptor().getClass());
s = getSessionFactory().openSession(getInterceptor());
} else {
s = getSessionFactory().openSession();
}
threadSession.set(s);
}
} catch (HibernateException ex) {
throw new AxsRuntimeException(
AppErrorCodeConstants.
UNABLE_TO_GET_HIBERNATE_CURRENT_SESSION, ex);

}

log.debug("Exiting method HibernateUtil:currentSession");

return s;
}

download hibernate demo app from
http://caveatemptor.hibernate.org/2.html

It will have a file called HibernateUtil.java in which the approach mentioned before is implemented

But i've used event.getSession() (EventSource class) and it works!!!!!!!

Thanks