public static void init(ClusterDAO clusterDAO, GroupDAO groupDAO,
                          ViewInstanceDAO viewInstanceDAO, Users users) {
    GroupPrivilegeResourceProvider.clusterDAO = clusterDAO;
    GroupPrivilegeResourceProvider.groupDAO = groupDAO;
    GroupPrivilegeResourceProvider.viewInstanceDAO = viewInstanceDAO;
    GroupPrivilegeResourceProvider.users = users;
  }
Static initialization.
 @param clusterDAO      the cluster data access object
@param groupDAO        the group data access object
@param viewInstanceDAO the view instance data access object
@param users           the users helper instance
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/GroupPrivilegeResourceProvider.java