public JSONObject getSiteServiceInstance(String siteService) throws CorrelationException {
String vnfId = getSiteVNFId(siteService);
+ if (vnfId == null) {
+ return null;
+ }
JSONObject serviceInstanceInfo = getServiceInstanceByVnfId(vnfId);
String serviceInstancePath = serviceInstanceInfo.getString("related-link");
Response response = get(getHostAddr(), getPath(serviceInstancePath));