});
            csvWriter.flush();
        } catch (final IOException e) {
            logger.warn("Failed to write a crawling session info.", e);
        }
    }

    public void deleteBefore(final long date) {
        crawlingInfoBhv.selectBulk(cb -> cb.query().setExpiredTime_LessThan(date), list -> {
            final List<String> idList = list.stream().map(CrawlingInfo::getId).collect(Collectors.toList());

    @Resource
    private UserInfoBhv userInfoBhv;

    @Resource
    private SystemHelper systemHelper;

    @Resource
    protected FessConfig fessConfig;

    public void deleteBefore(final int days) {
        searchLogBhv.queryDelete(cb -> {
            cb.query().setRequestedAt_LessEqual(systemHelper.getCurrentTimeAsLocalDateTime().minusDays(days));
        });
    }