final UrlQueue<?> urlQueue = (UrlQueue<?>) objs[1];
        final Throwable e = (Throwable) objs[2];
        logger.error("Crawling Exception at " + urlQueue.getUrl(), e);
    }

    protected void processCrawlingAccessException(final Object... objs) {
        // CrawlerContext crawlerContext = (CrawlerContext) objs[0];
        final UrlQueue<?> urlQueue = (UrlQueue<?>) objs[1];

        }
    }

    protected boolean isValid(final UrlQueue<?> urlQueue) {
        if (urlQueue == null || StringUtil.isBlank(urlQueue.getUrl())
                || crawlerContext.getMaxDepth() >= 0 && urlQueue.getDepth() > crawlerContext.getMaxDepth()) {
            return false;
        }

        // url filter
        if (crawlerContext.urlFilter.match(urlQueue.getUrl())) {
            return true;
        }

            assertEquals(maxCount, dataService.getCount(sessionId2));

            UrlQueue urlQueue;
            while ((urlQueue = urlQueueService.poll(sessionId1)) != null) {
                assertTrue(urlQueue.getUrl().startsWith(url1));
            }
            while ((urlQueue = urlQueueService.poll(sessionId2)) != null) {
                assertTrue(urlQueue.getUrl().startsWith(url2));
            }

    protected void storeChildUrlsToQueue(final UrlQueue<?> urlQueue, final Set<RequestData> childUrlSet) {
        if (childUrlSet != null) {
            // add an url
            try {
                storeChildUrls(childUrlSet.stream().filter(rd -> StringUtil.isNotBlank(rd.getUrl())).collect(Collectors.toSet()),
                        urlQueue.getUrl(), urlQueue.getDepth() != null ? urlQueue.getDepth() + 1 : 1);

            return;
        }
        final OpenSearchUrlQueue urlQueue = new OpenSearchUrlQueue();
        urlQueue.setSessionId(sessionId);
        urlQueue.setUrl(url);
        urlQueue.setCreateTime(System.currentTimeMillis());
        urlQueue.setLastModified(0L);
        urlQueue.setDepth(0);
        urlQueue.setMethod(Constants.GET_METHOD);
        insert(urlQueue);
    }

    @Override

        return buf;
    }

    protected String getUrl(final Object keyObj) {
        if (keyObj instanceof final UrlQueue<?> urlQueue) {
            return escapeValue(urlQueue.getUrl());
        }
        if (keyObj instanceof final StatsKeyObject statsKey) {
            return escapeValue(statsKey.getUrl());
        }

            assertEquals(maxCount, dataService.getCount(sessionId2));

            UrlQueue urlQueue;
            while ((urlQueue = urlQueueService.poll(sessionId1)) != null) {
                assertTrue(urlQueue.getUrl().startsWith(url1));
            }
            while ((urlQueue = urlQueueService.poll(sessionId2)) != null) {
                assertTrue(urlQueue.getUrl().startsWith(url2));
            }

            final long maxAccessCount = getMaxAccessCount(paramMap, dataMap);
            long counter = 0;
            final Deque<String> urlQueue = new LinkedList<>();
            final Set<String> processedUrls = new HashSet<>();
            urlQueue.offer(url);
            while (!urlQueue.isEmpty() && (maxAccessCount < 0 || counter < maxAccessCount)) {
                counter++;
                final Map<String, Object> localDataMap =

        String urlEncoding;
        final UrlQueue<?> urlQueue = CrawlingParameterUtil.getUrlQueue();
        if (urlQueue != null && urlQueue.getEncoding() != null) {
            urlEncoding = urlQueue.getEncoding();
        } else {
            urlEncoding = responseData.getCharSet();
        }

        // cid

        final Map<String, String> xpathConfigMap = crawlingConfig.getConfigParameterMap(ConfigName.XPATH);

        String urlEncoding;
        final UrlQueue<?> urlQueue = CrawlingParameterUtil.getUrlQueue();
        if (urlQueue != null && urlQueue.getEncoding() != null) {
            urlEncoding = urlQueue.getEncoding();
        } else {
            urlEncoding = responseData.getCharSet();
        }

        // cid