protected boolean favoriteSupport;

    protected boolean thumbnailSupport;

    @Override
    public ActionResponse hookBefore(final ActionRuntime runtime) { // application may override
        searchLogSupport = fessConfig.isSearchLog();
        favoriteSupport = fessConfig.isUserFavorite();
        thumbnailSupport = fessConfig.isThumbnailEnabled();
        runtime.registerData("searchLogSupport", searchLogSupport);

        final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldThumbnail(), String.class);
        if (StringUtil.isBlank(form.queryId) || StringUtil.isBlank(url) || !thumbnailSupport) {
            // 404
            throw responseManager.new404("Thumbnail for " + form.docId + " is not found.");
        }

        final File thumbnailFile = thumbnailManager.getThumbnailFile(doc);