protected int maxRetryCount = 5;

    protected long retryInterval = 500;

    protected RequestListener listener;

    @Override
    public void setInitParameterMap(final Map<String, Object> params) {
        client.setInitParameterMap(params);
    }

    @Override
    public ResponseData execute(final RequestData request) {
        if (listener != null) {
            listener.onRequestStart(this, request);

                return entry.getValue();
            }
        }
        return null;
    }

    public void setInitParameterMap(final Map<String, Object> params) {
        if (params != null) {
            for (final CrawlerClient client : clientMap.values()) {
                client.setInitParameterMap(params);
            }
        }
    }

    public void setClientMap(final Map<Pattern, CrawlerClient> clientMap) {

                return null;
            }

            @Override
            public void setInitParameterMap(final Map<String, Object> params) {
                buf.append("value=").append(params.get("hoge"));
            }

        });

        clientFactory.setInitParameterMap(paramMap);

        assertEquals("value=test", buf.toString());
    }

    public void test_getClient_null() {

    }

    public CrawlerClientFactory getParent() {
        return factory;
    }

    @Override
    public void setInitParameterMap(final Map<String, Object> params) {
        this.params.putAll(params);
    }

    public void initParameterMap() {
        factory.setInitParameterMap(params);
    }

    @Override
    public void init() {
        factory.init();
    }

    @Override

import org.codelibs.fess.crawler.entity.RequestData;
import org.codelibs.fess.crawler.entity.ResponseData;

/**
 * @author shinsuke
 *
 */
public interface CrawlerClient extends AutoCloseable {

    void setInitParameterMap(Map<String, Object> params);

    ResponseData execute(RequestData data);

    @Override
    default void close() throws Exception {
        // nothing
    }

        CrawlerClientFactory crawlerClientFactory = webConfig.initializeClientFactory(() -> new CrawlerClientFactory() {
            public void setInitParameterMap(final Map<String, Object> params) {
                initParamMapSet.set(params);
            }
        });
        assertNotNull(crawlerClientFactory);
        Map<String, Object> initParamMap = initParamMapSet.get();

            return (T) Boolean.valueOf(value.toString());
        }
        return (T) value;
    }

    @Override
    public void setInitParameterMap(final Map<String, Object> params) {
        initParamMap = params;
    }

    @Override
    public ResponseData execute(final RequestData request) {
        return switch (request.getMethod()) {

    // ExecutorService executorService = Executors.newFixedThreadPool(1);
    //
    // // HttpClient Parameters
    // Map<String, Object> paramMap = new HashMap<String, Object>();
    // httpClient.setInitParameterMap(paramMap);
    //
    // DigestScheme digestScheme = new DigestScheme();
    // List<Authentication> basicAuthList = new ArrayList<Authentication>();
    // basicAuthList.add(new AuthenticationImpl(