try (Stream<Path> walk = Files.walk(dir, FileVisitOption.FOLLOW_LINKS)) {
            walk.sorted(Comparator.reverseOrder()).forEach(f -> {
                if (logger.isDebugEnabled()) {
                    logger.debug("Deleting {}", f);
                }
                try {
                    Files.delete(f);
                } catch (final IOException e) {
                    logger.warn("Failed to delete {}", f, e);
                }

    }

    protected void delete(final String entryDN, final Supplier<Hashtable<String, String>> envSupplier) {
        try (DirContextHolder holder = getDirContext(envSupplier)) {
            logger.debug("Deleting {}", entryDN);
            holder.get().destroySubcontext(entryDN);
        } catch (final NamingException e) {
            throw new LdapOperationException("Failed to delete " + entryDN, e);
        }
    }

        for (final String sessionId : finishedSessionIdList) {
            final long execTime2 = systemHelper.getCurrentTimeAsLong();
            if (logger.isDebugEnabled()) {
                logger.debug("Deleting document data: {}", sessionId);
            }
            deleteBySessionId(sessionId);
            if (logger.isDebugEnabled()) {
                logger.debug("Deleted {} documents. The execution time is {}ms.", sessionId,

    /** The key of the message: Installing {0} plugin. */
    public static final String SUCCESS_install_plugin = "{success.install_plugin}";

    /** The key of the message: Deleting {0} plugin. */
    public static final String SUCCESS_delete_plugin = "{success.delete_plugin}";

    /** The key of the message: Uploaded {0} */

        }
    }

    protected boolean deleteDocument(final DataStoreParams paramMap, final Map<String, Object> dataMap) {

        if (logger.isDebugEnabled()) {
            logger.debug("Deleting {}", dataMap);
        }

        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        // required check