public long getOkMessageCount(RouteMetricSet metrics) {
        long count = 0;
        for (MessageTypeMetricSet m : metrics.getMetrics().values()) {
            count += m.count;
        }

        return count;
    }
Class that takes progress from the feed and prints to a stream.
vespaclient-java/src/main/java/com/yahoo/vespafeeder/ProgressPrinter.java