@Inject
  public static void init(StackAdvisorHelper instance, Configuration serverConfig, Clusters clusters,
                          AmbariMetaInfo ambariMetaInfo) {
    saHelper = instance;
    configuration = serverConfig;
    StackAdvisorResourceProvider.clusters = clusters;
    StackAdvisorResourceProvider.ambariMetaInfo = ambariMetaInfo;
  }
Abstract superclass for recommendations and validations.
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/StackAdvisorResourceProvider.java