final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String thumbnailId = DocumentUtil.getValue(docMap, fessConfig.getIndexFieldId(), String.class);
        final Tuple3<String, String, String> task = new Tuple3<>(getName(), thumbnailId, path);
        if (logger.isDebugEnabled()) {
            logger.debug("Create thumbnail task: {}", task);
        }
        return task;
    }

            "keyword", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnThumbnailId = cci("thumbnail_id", "thumbnail_id", null, null, String.class, "thumbnailId", null,
            false, false, false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);

    public ColumnInfo columnCreatedBy() {
        return _columnCreatedBy;

        }

        if (logger.isDebugEnabled()) {
            logger.debug("Thumbnail Directory: {}", baseDir.getAbsolutePath());
        }

        thumbnailTaskQueue = new LinkedBlockingQueue<>(thumbnailTaskQueueSize);
        generating = !Constants.TRUE.equalsIgnoreCase(System.getProperty("fess.thumbnail.process"));
        thumbnailQueueThread = new Thread((Runnable) () -> {

        }

        final TimeoutTask timeoutTask = createTimeoutTask();
        try {
            executeThumbnailGenerator();
        } catch (final Exception e) {
            logger.warn("Failed to generate thumbnails.", e);
            resultBuf.append(e.getMessage()).append("\n");
        } finally {
            if (timeoutTask != null && !timeoutTask.isCanceled()) {
                timeoutTask.cancel();
            }
        }

    public void setThumbnailId_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda) {
        setThumbnailId_Terms("thumbnail_id", opLambda, null);
    }

    public void setThumbnailId_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsThumbnailQueueCA> aggsLambda) {
        setThumbnailId_Terms("thumbnail_id", opLambda, aggsLambda);
    }

searchlog.request.headers=
searchlog.process.batch_size=100

thumbnail.html.image.min.width=100
thumbnail.html.image.min.height=100
thumbnail.html.image.max.aspect.ratio=3.0
thumbnail.html.image.thumbnail.width=100
thumbnail.html.image.thumbnail.height=100
thumbnail.html.image.format=png
thumbnail.html.image.xpath=//IMG
thumbnail.html.image.exclude.extensions=svg,html,css,js
thumbnail.generator.interval=0
thumbnail.generator.targets=all

    public enum ArtifactType {
        DATA_STORE("fess-ds"), //
        THEME("fess-theme"), //
        INGEST("fess-ingest"), //
        SCRIPT("fess-script"), //
        WEBAPP("fess-webapp"), //
        THUMBNAIL("fess-thumbnail"), //
        CRAWLER("fess-crawler"), //
        UNKNOWN("jar");

        private final String id;

        ArtifactType(final String id) {
            this.id = id;
        }

    private static final String X_ROBOTS_TAG = "X-Robots-Tag";

    private static final String META_NAME_THUMBNAIL_CONTENT = "//META[@name=\"thumbnail\" or @name=\"THUMBNAIL\"]/@content";

    private static final String META_PROPERTY_OGIMAGE_CONTENT = "//META[@property=\"og:image\"]/@content";

                                            key="labels.thumbnail"/></span>
                                    <div class="form-inline col-sm-9">
                                        <la:errors property="thumbnail"/>
                                        <div class="form-check">
                                            <la:checkbox styleId="thumbnail" styleClass="form-check-input" property="thumbnail"/>

            result.setPath(DfTypeUtil.toString(source.get("path")));
            result.setTarget(DfTypeUtil.toString(source.get("target")));
            result.setThumbnailId(DfTypeUtil.toString(source.get("thumbnail_id")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();