How to use

CallbackHandler

in

com.ning.metrics.serialization.writer

@Override
public void send(final File file, final CallbackHandler handler)
{
  // no-op
  handler.onSuccess(file);
}

  @Override
  public void onThrowable(final Throwable t)
  {
    activeRequests.decrementAndGet();
    handler.onError(t, file);
  }
};

@Override
public Response onCompleted(final Response response)
{
  activeRequests.decrementAndGet();
  if (response.getStatusCode() == 202) {
    handler.onSuccess(file);
  }
  else {
    handler.onError(new IOException(String.format("Received response %d: %s",
                           response.getStatusCode(), response.getStatusText())), file);
  }
  sendTimer.update(System.nanoTime() - startTime, TimeUnit.NANOSECONDS);
  return response; // never read
}