getCrawlingInfoService().store(crawlingInfo);
        } catch (final Exception e) {
            throw new FessSystemException("No crawling session.", e);
        }

    }

    public Date getDocumentExpires(final CrawlingConfig config) {
        if (config != null) {
            final Integer timeToLive = config.getTimeToLive();
            if (timeToLive != null) {
                // timeToLive minutes

        final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final Date documentExpires = crawlingInfoHelper.getDocumentExpires(config);
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final Map<String, String> paramEnvMap = systemHelper.getFilteredEnvMap(fessConfig.getCrawlerDataEnvParamKeyPattern());

                    storeChildUrlsToQueue(urlQueue, getAnchorSet(document.get(fessConfig.getIndexFieldAnchor())));

                    final Date documentExpires = crawlingInfoHelper.getDocumentExpires(crawlingConfig);
                    if (documentExpires != null
                            && !indexingHelper.updateDocument(searchEngineClient, id, fessConfig.getIndexFieldExpires(), documentExpires)) {

        final PathMappingHelper pathMappingHelper = ComponentUtil.getPathMappingHelper();
        final Date documentExpires = crawlingInfoHelper.getDocumentExpires(crawlingConfig);
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final FileTypeHelper fileTypeHelper = ComponentUtil.getFileTypeHelper();

        final PathMappingHelper pathMappingHelper = ComponentUtil.getPathMappingHelper();
        final CrawlingConfig crawlingConfig = getCrawlingConfig(responseData);
        final Date documentExpires = crawlingInfoHelper.getDocumentExpires(crawlingConfig);
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final FileTypeHelper fileTypeHelper = ComponentUtil.getFileTypeHelper();