Does anyone knows the difference of

this:

@Observer("org.jboss.seam.preDestroyContext.SESSION")
@Transactional(TransactionPropagationType.REQUIRED)
public void sessionDestroyed() {

log.info("Date #0", new Date());
                
}

and that:
       

@Destroy
public void destroy() {
        
log.info("Date #0", new Date());
}

both logs the same date, so both are triggered at the same time - when should I use @Destroy and when 'org.jboss.seam.preDestroyContext.SESSION' ?