public static void init(TopologyManager manager, TopologyRequestFactory requestFactory,
                          SecurityConfigurationFactory securityFactory, Gson instance) {
    topologyManager = manager;
    topologyRequestFactory = requestFactory;
    securityConfigurationFactory = securityFactory;
    jsonSerializer = instance;
  }
Inject the blueprint data access object which is used to obtain blueprint entities.
 @param manager         topology manager
@param requestFactory  request factory
@param instance
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ClusterResourceProvider.java