+ private static final Logger logger = LoggerFactory.getLogger(AbstractStatsTracker.class);
+
+ private static final int WAIT_FOR_REQUEST_CYCLE = 2;
+
+ private final FutureCallback<RpcResult<? extends TransactionAware>> callback =
+ new FutureCallback<RpcResult<? extends TransactionAware>>() {
+ @Override
+ public void onSuccess(RpcResult<? extends TransactionAware> result) {
+ if (result.isSuccessful()) {
+ final TransactionId id = result.getResult().getTransactionId();
+ if (id == null) {
+ final Throwable t = new UnsupportedOperationException("No protocol support");
+ t.fillInStackTrace();
+ onFailure(t);
+ } else {
+ context.registerTransaction(id);
+ }
+ } else {
+ logger.debug("Statistics request failed: {}", result.getErrors());
+
+ final Throwable t = new RPCFailedException("Failed to send statistics request", result.getErrors());
+ t.fillInStackTrace();
+ onFailure(t);
+ }
+ }
+
+ @Override
+ public void onFailure(Throwable t) {
+ logger.debug("Failed to send statistics request", t);
+ }
+ };
+