String clusterName = clusterData.getClusterName();
System.out.println("clusterName : " + clusterName);
Map<String, GroupData> groups = clusterData.getGroups();
for (String groupName : groups.keySet()) {
System.out.println("group name key: " + groupName);
GroupData groupData = groups.get(groupName);
System.out.println("group data name: " + groupData.getGroupName());
List<ServerData> servers = groupData.getInstances();
for (ServerData serverData : servers) {
System.out.println("server data - name:" + serverData.getName()
+ ", status: " + serverData.getStatus() + ", action: "
+ serverData.getStatus());
}