code: private void publishToRepository(String attributeName, String attributeType, Object oldValue, Object newValue) {
          super.sendNotification(new AttributeChangeNotification(
                          this,
                          sequenceNum.incrementAndGet(),
                          System.currentTimeMillis(),
                          "",
                          attributeName,
                          attributeType,
                          oldValue,
                          newValue));
      }
docs: Send attribute change notification