Hibernate interceptors with spring does not intercept

Question

I'm trying to use interceptors with hibernate in order to create a log table. The application works fine but my interceptors are never triggered when they were supposed to be triggered.
I tried the solutions of this post on stack overflow and I did not succed in making it work.

What I did is:

• create an entity class that will be the table where the log are stored (UserLog)
• create another class called by the interceptor that will fill my table (dao), in this example it is called UserLogUtil

I tried the first solution, making my interceptor class not dependant on spring @Autowire by making the UserLogUtil a singleton manually and adding the following line to my application.properties : spring.jpa.properties.hibernate.ejb.interceptor=LogInterceptor.

I also tried the second solution by autowiring UserLogUtil however my spring configuration is in xml and although I tried to convert the beans from the above example it did not work.

This is what my interceptor looks like:

public class LogInterceptor extends EmptyInterceptor {

  private UserLogUtil userLogUtil = UserLogUtil.getInstance();

  public boolean onSave(Object entity,Serializable id, Object[] state,String[] propertyNames,Type[] types)
      throws CallbackException {
    if (entity instanceof Owner){
      userLogUtil.log(........));
    }
    return false;
  }

I think I missed something in the process of building my interceptor and my design could be flawed. Do you have any idea that could make my interceptor function as it should ?