eventlisteners using hibernate 4.0 with spring 3.1.0.release?
You might wanna check the Hibernate Ticket [1]: https://hibernate.onjira.com/browse/HHH-6945
The migration guide says:
hibernate.cfg.xml no longer supported as means of specifying listeners. New approach invloves using an org.hibernate.integrator.spi.Integrator which works based on "service discovery".
And you can get the complete instructions @ http://in.relation.to/Bloggers/EventListenerRegistration
The links in the ticket have some issue, use the following:
https://github.com/hibernate/hibernate-orm/blob/master/hibernate-envers/src/main/java/org/hibernate/envers/event/EnversIntegrator.java
https://github.com/hibernate/hibernate-orm/blob/master/hibernate-envers/src/main/resources/META-INF/services/org.hibernate.integrator.spi.Integrator
Hope this helps someone looking answers for this problem.
I had the same frustrating problem. Hibernate 4 appears to have fundamentally changed the way you register for events and the Spring group has not yet caught up. Here's my annotation-based solution using an init method to register a listener:
@Component
public class HibernateEventWiring {
@Autowired
private SessionFactory sessionFactory;
@Autowired
private SomeHibernateListener listener;
@PostConstruct
public void registerListeners() {
EventListenerRegistry registry = ((SessionFactoryImpl) sessionFactory).getServiceRegistry().getService(
EventListenerRegistry.class);
registry.getEventListenerGroup(EventType.POST_COMMIT_INSERT).appendListener(listener);
registry.getEventListenerGroup(EventType.POST_COMMIT_UPDATE).appendListener(listener);
}
}
An interceptor would be another fine approach, but support for interceptors was mistakenly dropped: https://jira.springsource.org/browse/SPR-8940
The new approach is to use an Integrator to register the event listeners. Hibernate will now use service discovery for registering event listeners and here is how I got it to work using a maven archetype-webapp
create a file under META-INF/services (which should reside under your resources directory) called org.hibernate.integrator.spi.Integrator with all classes that implement the hibernate spi Interface, one line each. Short example below:
...
META-INF/services/org.hibernate.integrator.spi.Integrator
com.example.CustomIntegrator
com.example.CustomIntegrator
package com.example;
import ...;
public void CustomIntegrator implements Integrator {
static final Logger logger = LoggerFactory.getLogger(CustomIntegrator.class);
@Override
public void integrate(Configuration configuration, SessionFactoryImplementor implementor, SessionFactoryServiceRegistry registry) {
final EventListenerRegistry eventRegistry = registry.getService(EventListenerRegistry.class);
logger.info("Registering event listeners");
// you can add duplication strategory for duplicate registrations
...
// prepend to register before or append to register after
// this example will register a persist event listener
eventRegistry.prependListeners(EventType.PERSIST, myListener);
...
}
...
}
com.example.MyListener
package com.example;
import ...
public class MyListener implements PersistEventListener {
static final Logger logger = LoggerFactory.getLogger(MyListener.class);
public void onPersist(PersistEvent event) throws HibernateException {
logger.debug("Entering MyListener");
if(event.getObject() instanceof MyPersistableEntity) {
MyPersistableEntity entity = (MyPersistableEntity) event.getObject();
// do something with entity
...
}
}
...
}
Any entity that needs to have this event registered to it must implement MyPersistableEntity (not shown here)