@Override
            public String getIndexFieldExpires() {
                return expiresFieldName;
            }

            @Override
            public String getIndexDocumentUpdateIndex() {
                return documentUpdateIndex;
            }
        };

        // Register components
        ComponentUtil.register(searchEngineClient, "searchEngineClient");

            context.skipRoleQuery();
        });
        return ComponentUtil.getSearchEngineClient()
                .deleteByQuery(ComponentUtil.getFessConfig().getIndexDocumentUpdateIndex(), queryContext.getQueryBuilder());
    }

    /**
     * Extracts and normalizes language preferences from request parameters or browser locale.
     *

        // Mock FessConfig
        FessConfig mockFessConfig = new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public String getIndexDocumentUpdateIndex() {
                return "fess.update";
            }

            @Override
            public String getIndexFieldUrl() {
                return "url";
            }

            @Override

            }

            @Override
            public String getIndexFieldExpires() {
                return "expires";
            }

            @Override
            public String getIndexDocumentUpdateIndex() {
                return "fess.search";
            }
        });

        // Fast mock components
        ComponentUtil.register(new CrawlingInfoHelper(), "crawlingInfoHelper");

        }

        @Override
        public String getIndexDocumentSearchIndex() {
            return "fess.search";
        }

        @Override
        public String getIndexDocumentUpdateIndex() {
            return "fess.update";
        }

        @Override
        public String getIndexFieldDocId() {
            return "doc_id";
        }

        @Override

                    logger.debug("Deleted {} stale documents", deletedDocCount);
                }
                final BulkResponse response =
                        searchEngineClient.addAll(fessConfig.getIndexDocumentUpdateIndex(), docList, (doc, builder) -> {
                            final String configId = (String) doc.get(fessConfig.getIndexFieldConfigId());

    // GET /api/admin/searchlist/doc/{doc_id}
    @Execute
    public JsonResponse<ApiResult> get$doc(final String id) {
        return asJson(new ApiDocResponse().doc(searchEngineClient.getDocument(fessConfig.getIndexDocumentUpdateIndex(), builder -> {
            builder.setQuery(QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), id));
            return true;
        }).orElseGet(() -> {

        // clean up
        final QueryBuilder queryBuilder = QueryBuilders.rangeQuery(fessConfig.getIndexFieldExpires()).to("now");
        try {
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), queryBuilder);

        } catch (final Exception e) {
            logger.error("Could not delete expired documents: {}", queryBuilder, e);
            resultBuf.append(e.getMessage()).append("\n");
        }

        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;
        }
        final SearchResponse response = client.prepareSearch(index)

        final String docId = form.docId;
        try {
            final QueryBuilder query = QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), docId);
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), query);
            saveInfo(messages -> messages.addSuccessDeleteDocFromIndex(GLOBAL));
        } catch (final Exception e) {
            logger.warn("Failed to process a request.", e);