@Override
  public OperationResult performOperation(String categoryName, Map<String, String> properties,
                                          boolean mergeExistingProperties, String operation,
                                          Map<String, Object> operationParameters) throws SystemException {
    throw new SystemException(String.format("The requested operation is not supported for this category: %s", categoryName));
  }
AmbariServerConfigurationHandler handles Ambari server specific configuration properties.
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AmbariServerConfigurationHandler.java