@Override
 protected void onEntityAdded(Entity member) {
   if (LOG.isTraceEnabled()) {
     LOG.trace(
         "State of {} on added: {}",
         member,
         member.getAttribute(Attributes.SERVICE_STATE_ACTUAL).name());
   }
   ((BindDnsServerImpl) entity).configureResolver(member);
 }
 @Override
 protected void onEntityChange(Entity member) {
   if (LOG.isTraceEnabled()) {
     LOG.trace(
         "State of {} on change: {}",
         member,
         member.getAttribute(Attributes.SERVICE_STATE_ACTUAL).name());
   }
   ((BindDnsServerImpl) entity).update();
 }