1 Reply Latest reply on Jan 30, 2013 4:06 PM by adamw

    Conditional Auditing

    bathe
    bathe Jan 12, 2013 12:44 PM

      I have a requirement where I want to audit records only on change of Status field.

       

      I have followed documentation Chapter Tutorial "15.8. Conditional auditing". 

      Step 1: Turn off automatic Envers event listeners registration. I have following: 

      <prop key="hibernate.listeners.envers.autoRegister">false</prop>

      Step 2: Create subclasses for appropriate event listeners. 

      public class DeleteEnversListener extends EnversPostDeleteEventListenerImpl {  
             private static final long serialVersionUID = 5906427978349712224L;  
             private static Log log = LogFactory.getLog(DeleteEnversListener.class);    
       
             public DeleteEnversListener(AuditConfiguration enversConfiguration) {  
                super(enversConfiguration);   
       }    
       
             @Override  
             public void onPostDelete(PostDeleteEvent event) {  
         log      .info("!!! just logging entity !! "+ event.getEntity());  
               super.onPostDelete(event);  
             } 
      }

      In simillar way, I have

      • InsertEnversListener
      • UpdateEnversListener
      • DeleteEnversListener
      • CollectionRecreateEnversListener
      • PreCollectionRemoveEnversListener
      • PreCollectionUpdateEnversListener

      Step 3: Create your own implementation of org.hibernate.integrator.spi.Integrator

      public class CustomEnversIntegrator extends EnversIntegrator   {    
             private static Log log = LogFactory.getLog(CustomEnversIntegrator.class);    
       
             @Override  
             public void integrate(Configuration configuration,  SessionFactoryImplementor sessionFactory,  SessionFactoryServiceRegistry serviceRegistry) {    
               super.integrate(configuration, sessionFactory, serviceRegistry);  
               final AuditConfiguration enversConfiguration = 
                   AuditConfiguration.getFor( configuration, serviceRegistry.getService( ClassLoaderService.class ) );  
       
               EventListenerRegistry listenerRegistry = serviceRegistry.getService( EventListenerRegistry.class );    
       
               System.out.println("Registering event listeners");  
         
               if (enversConfiguration.getEntCfg().hasAuditedEntities()) {  
           listenerRegistry      .appendListeners(EventType.POST_INSERT, new InsertEnversListener(enversConfiguration));  
           listenerRegistry      .appendListeners(EventType.POST_UPDATE, new UpdateEnversListener(enversConfiguration));  
           listenerRegistry      .appendListeners(EventType.POST_DELETE, new DeleteEnversListener(enversConfiguration));  
           listenerRegistry      .appendListeners(EventType.POST_COLLECTION_RECREATE, new CollectionRecreateEnversListener(enversConfiguration));  
           listenerRegistry      .appendListeners(EventType.PRE_COLLECTION_REMOVE, new PreCollectionRemoveEnversListener(enversConfiguration));  
           listenerRegistry      .appendListeners(EventType.PRE_COLLECTION_UPDATE, new PreCollectionUpdateEnversListener(enversConfiguration));  
                }
              }  
             }

      Step 4: For the integrator to be automatically used when Hibernate starts up, you will need to add a META-INF/services/org.hibernate.integrator.spi.Integrator file. Content of org.hibernate.integrator.spi.Integrator file are:

      com.hib.sample.listener.CustomEnversIntegrator

       

      I am not sure, if I am missing anything. I am using JBOSS AS 7.0 with Hibernate 4.1.8

       

      Please note that I have created dynamic Web project using Eclipse Juno and using default location of Meta-inf folder.

       

      Thanks,

      Shirish