*/
    protected Map<Pattern, CrawlerClient> clientMap = new LinkedHashMap<>();

    /**
     * Creates a new instance of CrawlerClientFactory.
     */
    public CrawlerClientFactory() {
        // NOP
    }

    /**
     * Initializes the CrawlerClientFactory.
     * Attempts to register itself with a "crawlerClientCreator" component if available.
     */
    @PostConstruct
    public void init() {

        this.intervalController = intervalController;
    }

    /**
     * Returns the crawler client factory.
     * @return The CrawlerClientFactory instance.
     */
    public CrawlerClientFactory getClientFactory() {
        return clientFactory;
    }

    /**
     * Checks if the crawler is running in background mode.

    public synchronized void register(final CrawlerClientFactory crawlerClientFactory) {
        clientMap.entrySet().stream().forEach(e -> load(crawlerClientFactory, e.getKey(), e.getValue()));
        clientFactoryList.add(crawlerClientFactory);
        if (clientFactoryList.size() > maxClientFactorySize) {
            clientFactoryList.remove(0);
        }
    }

    /**
     * Registers a client component with a regular expression.

     *
     * @param factory the underlying CrawlerClientFactory instance to delegate operations to
     */
    public CrawlerClientFactoryWrapper(final CrawlerClientFactory factory) {
        this.factory = factory;
    }

    /**
     * Returns the parent CrawlerClientFactory.
     * @return The parent CrawlerClientFactory.
     */
    public CrawlerClientFactory getParent() {
        return factory;
    }

        }
        return handlerScriptMap;
    }

    @Override
    public CrawlerClientFactory initializeClientFactory(final Supplier<CrawlerClientFactory> creator) {
        if (crawlerClientFactory != null) {
            return crawlerClientFactory;
        }
        final CrawlerClientFactory factory = creator.get();

        final Map<String, String> paramMap = getHandlerParameterMap();

                logger.info("Generating Thumbnail: {}", url);
            }

            final CrawlerClientFactory crawlerClientFactory =
                    config.initializeClientFactory(() -> ComponentUtil.getComponent(CrawlerClientFactory.class));
            final CrawlerClient client = crawlerClientFactory.getClient(url);
            if (client == null) {

     * @param crawlerClientFactory the factory for creating crawler clients
     * @param nThreads the number of threads for the executor service (minimum 1)
     */
    public FileListIndexUpdateCallbackImpl(final IndexUpdateCallback indexUpdateCallback, final CrawlerClientFactory crawlerClientFactory,
            final int nThreads) {

import org.codelibs.core.lang.SystemUtil;
import org.codelibs.fess.crawler.builder.RequestDataBuilder;
import org.codelibs.fess.crawler.client.CrawlerClient;
import org.codelibs.fess.crawler.client.CrawlerClientFactory;
import org.codelibs.fess.crawler.container.CrawlerContainer;
import org.codelibs.fess.crawler.entity.AccessResult;
import org.codelibs.fess.crawler.entity.RequestData;
import org.codelibs.fess.crawler.entity.ResponseData;

        }
        final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
        final CrawlerClientFactory crawlerClientFactory =
                config.initializeClientFactory(() -> ComponentUtil.getComponent(CrawlerClientFactory.class));
        final CrawlerClient client = crawlerClientFactory.getClient(url);
        if (client == null) {

            throw new CrawlingAccessException("sessionId is null.");
        }

        final CrawlerClientFactory crawlerClientFactory = crawlingConfig.initializeClientFactory(ComponentUtil::getCrawlerClientFactory);
        final CrawlerClient client = crawlerClientFactory.getClient(url);
        if (client == null) {
            throw new CrawlingAccessException("CrawlerClient is null for " + url);
        }