Strange problem with Entitymanager.remove()
Hi guys,
I have a strange problem to delete entities in bulk mode from JSF managed CDI bean. If I trigger the delete method from an EJB than it's works as excpected.
This is my "Bulk" delete method.
@Override
public <T extends EditableIF> List<Long> makeTransient(List<T> editables){
try {
if (editables == null || editables.size() == 0) {
log.error("Nothing to delete");
return new ArrayList<>();
}
// Backup the current flushmode
FlushModeType flushModeBefore = em.getFlushMode();
em.setFlushMode(FlushModeType.COMMIT);
int i = 0;
// Save or update all editables and flush every 50 times
ArrayList<Long> ids = new ArrayList<>();
for (T eif : editables) {
em.remove(mergeIfNeeded(eif));
ids.add(eif.getId());
i++;
if (i % BULK_FLUSH_SIZE == 0) {
em.flush();
}
}
em.flush();
em.setFlushMode(flushModeBefore);
return ids;
} catch (HibernateException ex) {
throw new InfrastructureException(ex);
}
}
The intent of this mehtod is that I wan't improve performance for big deletions. As I said, if I trigger this method from an EJB then it works fine. But if I trigger this from an SessionScoped CDI bean then the database entries are not deleted.
For tracking the behaviuour of hibernate I switch the loglevel of org.hibernate.event.internal.DefaultDeleteEventListener to TRACE and add a delete interceptor.
The related logentires are shown below:
13:36:58,120 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting a persistent instance 13:36:58,135 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting [com.siemag.components.model.message.MessagePrototype#281280] 13:36:58,135 INFO [com.siemag.components.server.updating.DomainInterceptor] (http-localhost-127.0.0.1-8080-4) Delete ID 281280 entity com.siemag.components.model.message.MessagePrototype@917079[Id=281280,name=CC011/1444,creationTime=Sun Jan 13 15:09:44 CET 2013] 13:36:58,135 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting a persistent instance 13:36:58,151 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting [com.siemag.components.model.message.MessagePrototype#281281] 13:36:58,151 INFO [com.siemag.components.server.updating.DomainInterceptor] (http-localhost-127.0.0.1-8080-4) Delete ID 281281 entity com.siemag.components.model.message.MessagePrototype@1914f6[Id=281281,name=HBS/145,creationTime=Sun Jan 13 15:09:44 CET 2013] 13:36:58,634 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting a persistent instance 13:36:58,634 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting [com.siemag.components.model.message.MessagePrototype#281280] 13:36:58,634 INFO [com.siemag.components.server.updating.DomainInterceptor] (http-localhost-127.0.0.1-8080-4) Delete ID 281280 entity com.siemag.components.model.message.MessagePrototype@adfa17[Id=281280,name=CC011/1444,creationTime=Sun Jan 13 15:09:44 CET 2013] 13:36:58,650 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting a persistent instance 13:36:58,650 TRACE [org.hibernate.event.internal.DefaultDeleteEventListener] (http-localhost-127.0.0.1-8080-4) Deleting [com.siemag.components.model.message.MessagePrototype#281281] 13:36:58,650 INFO [com.siemag.components.server.updating.DomainInterceptor] (http-localhost-127.0.0.1-8080-4) Delete ID 281281 entity com.siemag.components.model.message.MessagePrototype@1616c73[Id=281281,name=HBS/145,creationTime=Sun Jan 13 15:09:44 CET 2013]
The strange thing here is that hibernate recognize the delete action but it doesn't excecute a delete statement on the DB.
Thanks in advance.
My runtime:
Jboss 7.1.1.Final
Hibernate 4.1.4.Final
Primefaces 3.4.2