protected void updateLinks(Map<Link, Long> oldTraffic, Map<Link, Long> linkTraffic) { for (Map.Entry<Link, Long> linkDoubleEntry : linkTraffic.entrySet()) { Link link = linkDoubleEntry.getKey(); if (oldTraffic != null) { oldTraffic.put(link, link.getUsedCapacity()); } link.setUsedCapacity(linkDoubleEntry.getValue()); } }