@Test
  public void test() {

    LocalDateTime now = LocalDateTime.now();
    LocalDateTime keytime = now.withMinute(0).withSecond(0).withNano(0);

    mongoMetricsRepository.prepareMinutes(keytime);

    Map<String, Long> accumulators = Maps.newHashMap();
    accumulators.put(MetricKeys.globalTotalSize(), 5l);
    metricsService.sync(accumulators);

    Timeserie serie = metricsService.serie(MetricKeys.globalTotalSize());
    System.err.println(serie);
  }