Cluster cluster = getDummyCluster();
Host hostObject = clusters.getHost(DummyHostname1);
clusters.mapHostToCluster(hostObject.getHostName(), cluster.getClusterName());
Service hdfs = cluster.addService(HDFS);
hdfs.persist();
hdfs.addServiceComponent(DATANODE).persist();
hdfs.getServiceComponent(DATANODE).addServiceComponentHost(DummyHostname1).persist();
hdfs.addServiceComponent(NAMENODE).persist();
hdfs.getServiceComponent(NAMENODE).addServiceComponentHost(DummyHostname1).persist();
hdfs.getServiceComponent(NAMENODE).getServiceComponentHost(DummyHostname1).setState(State.STARTED);