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

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

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

        // 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

        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);

            return redirect(getClass());
        }
        try {
            searchEngineClient.flushConfigFiles(() -> {
                final String docIndex = fessConfig.getIndexDocumentUpdateIndex();
                searchEngineClient.admin().indices().prepareClose(docIndex).execute(ActionListener.wrap(res -> {
                    logger.info("Closing index: {}", docIndex);

                                        upsertMap.put(fessConfig.getIndexFieldClickCount(), count);
                                        return new UpdateRequest(fessConfig.getIndexDocumentUpdateIndex(), id).script(script)
                                                .upsert(upsertMap);
                                    }
                                    return null;
                                })

                final boolean isFessIndex = DOC_INDEX.equals(configIndex);
                final String indexName;
                if (isFessIndex) {
                    final boolean exists = existsIndex(fessConfig.getIndexDocumentUpdateIndex());
                    if (!exists) {
                        indexName = generateNewIndexName(configIndex);
                        createIndex(configIndex, indexName);

     * The value is, e.g. fess.update <br>
     * comment: Index name for update documents.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexDocumentUpdateIndex();

    /**
     * Get the value for the key 'index.document.suggest.index'. <br>
     * The value is, e.g. fess <br>
     * comment: Index name for suggest documents.