protected Function<Map<String, Object>, String[]> idFinder = params -> {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final SearchEngineClient client = ComponentUtil.getSearchEngineClient();
        final String index = fessConfig.getIndexDocumentUpdateIndex();
        final Object url = params.get("url");
        if (url == null) {
            return StringUtil.EMPTY_STRINGS;
        }

            return totalHits.value;
        }
        return 0;
    }

    public long deleteBySessionId(final String sessionId) {
        final SearchEngineClient searchEngineClient = ComponentUtil.getSearchEngineClient();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String index = fessConfig.getIndexDocumentUpdateIndex();
        return deleteBySessionId(searchEngineClient, index, sessionId);

        final String query = ComponentUtil.getQueryStringBuilder().params(params).sortField(params.getSort()).build();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return ComponentUtil.getSearchEngineClient().<Map<String, Object>> scrollSearch(fessConfig.getIndexDocumentSearchIndex(),
                searchRequestBuilder -> {
                    final QueryHelper queryHelper = ComponentUtil.getQueryHelper();

        contentFieldList = Arrays.asList(stream(fessConfig.getSuggestFieldContents()).get(stream -> stream.toArray(n -> new String[n])));

        final SearchEngineClient searchEngineClient = ComponentUtil.getSearchEngineClient();
        searchEngineClient.admin().cluster().prepareHealth().setWaitForYellowStatus().execute()
                .actionGet(fessConfig.getIndexHealthTimeout());

            final OptionalThing<FessUserBean> userBean) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return ComponentUtil.getSearchEngineClient().search(fessConfig.getIndexDocumentSearchIndex(),
                createSearchCondition(query, params, userBean), (searchRequestBuilder, execTime, searchResponse) -> {
                    searchResponse.ifPresent(r -> {

        }
        return "Unknown";
    }

    public void setupAdminHtmlData(final TypicalAction action, final ActionRuntime runtime) {
        runtime.registerData("developmentMode", ComponentUtil.getSearchEngineClient().isEmbedded());
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String installationLink = fessConfig.getOnlineHelpInstallation();

            this.expiry = expiry;
            fessConfig = ComponentUtil.getFessConfig();
            maxPurgeSize = fessConfig.getPageThumbnailPurgeMaxFetchSizeAsInteger();
            searchEngineClient = ComponentUtil.getSearchEngineClient();
        }

        protected void deleteFiles() {
            final Map<String, Path> deleteFileMap = new HashMap<>();
            for (final Path path : deletedFileList) {

        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final SearchEngineClient searchEngineClient = ComponentUtil.getSearchEngineClient();
        switch (form.crudMode) {
        case CrudMode.CREATE:
            final Map<String, Object> entity = new HashMap<>();

    }

    public static DataService<EsAccessResult> getDataService() {
        return getComponent(DATA_SERVICE);
    }

    public static SearchEngineClient getSearchEngineClient() {
        return getComponent(SEARCH_ENGINE_CLIENT);
    }

    public static FessConfig getFessConfig() {
        if (fessConfig != null) {
            return fessConfig;
        }

        if (!acceptHttpMethod(request, GET)) {
            return;
        }

        final SearchEngineClient searchEngineClient = ComponentUtil.getSearchEngineClient();
        try {
            final PingResponse pingResponse = searchEngineClient.ping();
            writeJsonResponse(pingResponse.getStatus() == 0 ? HttpServletResponse.SC_OK : HttpServletResponse.SC_SERVICE_UNAVAILABLE,