if (form.doc != null) {
                docId = (String) form.doc.get(fessConfig.getIndexFieldDocId());
            } else {
                docId = null;
            }
            if (StringUtil.isNotBlank(docId)) {
                return searchEngineClient.getDocument(fessConfig.getIndexDocumentUpdateIndex(), builder -> {
                    builder.setQuery(QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), docId));

     */
    public FesenClient() {
        address = System.getProperty(HTTP_ADDRESS, "localhost:9200").trim();
        final String targets = System.getProperty(TARGET_INDICES);
        if (StringUtil.isNotBlank(targets)) {
            targetIndices = Arrays.stream(targets.split(",")).map(String::trim).toArray(n -> new String[n]);
        }
    }

    /**
     * Sets the address of the OpenSearch instance.

            if (SpnegoHttpFilter.Constants.LOGGER_LEVEL.equals(name)) {
                final String logLevel = getProperty(SPNEGO_LOGGER_LEVEL, StringUtil.EMPTY);
                if (StringUtil.isNotBlank(logLevel)) {
                    return logLevel;
                }
                if (logger.isDebugEnabled()) {
                    return "3";
                }
                if (logger.isInfoEnabled()) {

        }
        final String[] values = value.split("[\r\n]");
        final List<String> list = new ArrayList<>(values.length);
        for (final String line : values) {
            if (StringUtil.isNotBlank(line)) {
                list.add(line.trim());
            }
        }
        return list.toArray(new String[list.size()]);
    }

                        message != null ? message.length() : 0, clearParam);
            }

            if (StringUtil.isBlank(message)) {
                if ("true".equals(clearParam) && StringUtil.isNotBlank(sessionId)) {
                    final String clearUserId = getUserId(request);
                    final boolean cleared = ComponentUtil.getChatSessionManager().clearSession(sessionId, clearUserId);

        final String body = toJson(Map.of( //
                "type", TYPE_HEARTBEAT, //
                "instanceId", instanceId, //
                "hostname", hostname, //
                "name", StringUtil.isNotBlank(targetName) ? targetName : hostname, //
                "status", STATUS_ACTIVE, //
                "createdTime", now, //
                "expiredTime", now + ttl));

     * @return the thumbnail file or null if not found
     */
    public File getThumbnailFile(final Map<String, Object> docMap) {
        final String thumbnailPath = getImageFilename(docMap);
        if (StringUtil.isNotBlank(thumbnailPath)) {
            final File file = new File(baseDir, thumbnailPath);
            if (file.isFile()) {
                return file;
            }
        }
        return null;
    }

            final Integer size, final SortBuilder<?>... sortBuilders) {
        return getList(clazz, builder -> {
            if (StringUtil.isNotBlank(sessionId)) {
                if (queryBuilder instanceof BoolQueryBuilder) {
                    ((BoolQueryBuilder) queryBuilder).filter(QueryBuilders.termQuery(SESSION_ID, sessionId));
                } else {