private NodeHistogramFactory newNodeHistogramFactory(boolean isSimpleResponseHistogram) {
        if (isSimpleResponseHistogram) {
            WasNodeHistogramDataSource dataSource = new MapResponseSimplifiedNodeHistogramDataSource(mapResponseDao);
            return new SimplifiedNodeHistogramFactory(dataSource);
        } else {
            WasNodeHistogramDataSource dataSource = new MapApplicationResponseNodeHistogramDataSource(mapResponseDao);
            return new DefaultNodeHistogramFactory(dataSource);
        }
    }
Used in the main UI - draws the server map by querying the timeslot by time.
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/service/MapServiceImpl.java