server](https://fess.codelibs.org/15.3/admin/webconfig-guide.html), [file system](https://fess.codelibs.org/15.3/admin/fileconfig-guide.html), or [Data Store](https://fess.codelibs.org/15.3/admin/dataconfig-guide.html) (such as a CSV or database). Many file formats are supported including (but not limited to): Microsoft Office, PDF, and zip.

*[Fess Site Search](https://github.com/codelibs/fess-site-search)* is a free alternative to [Google Site Search](https://enterprise.google.com/search/products/gss.html)....

        }
        return Constants.TRUE.equalsIgnoreCase(secure);
    }

    /**
     * Interface for rewriting search request parameters.
     *
     * Implementations can modify search parameters before they are processed
     * by the search engine, allowing for custom parameter transformation logic.
     */
    public interface SearchRequestParamsRewriter {
        /**
         * Rewrites the given search request parameters.

    /** A map of listeners for configuration updates. */
    protected Map<String, Supplier<String>> updateConfigListenerMap = new HashMap<>();

    /** A set of names of threads that are currently waiting. */
    protected Set<String> waitingThreadNames = Collections.synchronizedSet(new HashSet<>());

    /**
     * Initializes the SystemHelper.