//                                                                          ==========
    protected final String _tableDbName = "thumbnail_queue";
    protected final String _tableDispName = "thumbnail_queue";
    protected final String _tablePropertyName = "ThumbnailQueue";

    public String getTableDbName() {
        return _tableDbName;
    }

    @Override

public class FessCrawlerConfig extends EsCrawlerConfig {

    @Override
    public String getQueueIndex() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerIndex() + ".queue";
    }

    @Override
    public String getDataIndex() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerIndex() + ".data";
    }

    @Override
    public String getFilterIndex() {

                "fess_config.request_header", //
                "fess_config.role_type", //
                "fess_config.scheduled_job", //
                "fess_config.thumbnail_queue", //
                "fess_config.web_authentication", //
                "fess_config.web_config", //
                "fess_user.group", //
                "fess_user.role", //
                "fess_user.user", //

            urlFilterService.delete(sid);
        } catch (final Exception e) {
            logger.warn("Failed to delete UrlFilter for {}", sid, e);
        }

        try {
            // clear queue
            urlQueueService.clearCache();
            urlQueueService.delete(sid);
        } catch (final Exception e) {
            logger.warn("Failed to delete UrlQueue for {}", sid, e);
        }

        validate(form, messages -> {}, this::asIndexHtml);
        verifyToken(this::asIndexHtml);
        searchEngineClient.admin().indices().prepareDelete(//
                fessConfig.getIndexDocumentCrawlerIndex() + ".queue", //
                fessConfig.getIndexDocumentCrawlerIndex() + ".data", //
                fessConfig.getIndexDocumentCrawlerIndex() + ".filter")

    //                                                                       =============
    @Override
    public String asTableDbName() {
        return "thumbnail_queue";
    }

    @Override
    public String xgetAliasName() {
        return "thumbnail_queue";
    }

    // ===================================================================================