@Override
        public RefreshHFilesProtos.RefreshHFilesResponse
          call(RefreshHFilesProtos.RefreshHFilesService refreshHFilesService) throws IOException {
          ServerRpcController controller = new ServerRpcController();
          BlockingRpcCallback<RefreshHFilesProtos.RefreshHFilesResponse> rpcCallback =
            new BlockingRpcCallback<>();
          refreshHFilesService.refreshHFiles(controller, request, rpcCallback);

          if (controller.failedOnException()) {
            throw controller.getFailedOn();
          }

          return rpcCallback.get();
        }
Constructor with Conf object
@param cfg the {@link Configuration} object to use
hbase-examples/src/main/java/org/apache/hadoop/hbase/client/example/RefreshHFilesClient.java