@Override
  public boolean requiresPropertyProviderInput() {
    // the Blueprint-based renderer does not require property provider input
    // this method will help to filter out the un-necessary calls to the AMS
    // and Alerts Property providers, since they are not included in the
    // exported Blueprint
    return false;
  }
Management Controller used to get stack information.
ambari-server/src/main/java/org/apache/ambari/server/api/query/render/ClusterBlueprintRenderer.java