final Map<String, String[]> resultUrlCache = getResultDocIdsCache(session);
            final String[] urls = resultUrlCache.get(queryId);
            if (urls != null) {
                return urls;
            }
            return StringUtil.EMPTY_STRINGS;
        }).orElse(StringUtil.EMPTY_STRINGS);
    }

    private Map<String, String[]> getResultDocIdsCache(final HttpSession session) {