"http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName
+ "/StateModelDefs/MasterSlave";
Reference resourceRef = new Reference(httpUrlBase);
Request request = new Request(Method.GET, resourceRef);
Client client = new Client(Protocol.HTTP);
Response response = client.handle(request);
Representation result = response.getEntity();
StringWriter sw = new StringWriter();
result.write(sw);
ObjectMapper mapper = new ObjectMapper();
ZNRecord zn = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);