title: Spring - JPA - observe events
body: <p>I would like to observe when an entity is saved or deleted so that I may perform additional activities pertaining to that entity.  I thought I did this in the past WITHOUT using the @EntityListeners annotation on the entity class itself because my entity listeners would be implemented in the service layer and NOT in the model / data layer.</p>
  
  <p>The only other way I can think of to do it is inside the persistence.xml and specify my listeners there.</p>
  
  <p>Are there any alternate approaches?</p>