@Subscribe
  public void ambariConfigurationChanged(AmbariConfigurationChangedEvent event) {
    if (configurationCategory.getCategoryName().equalsIgnoreCase(event.getCategoryName())) {
      LOGGER.info("Ambari configuration changed event received: {}", event);
      instance = loadInstance();
      
    }
  }
Upon receiving this event, if the expected configuration category has been updated, the data is
reloaded.

@param event the received {@link AmbariConfigurationChangedEvent}
ambari-server/src/main/java/org/apache/ambari/server/configuration/AmbariServerConfigurationProvider.java