try {
                insert(urlQueue);
            } catch (final Exception e) {
                logger.warn("Failed to restore " + urlQueue, e);
            }
        }));
    }

    /**
     * Clears the cache.
     */
    public void clearCache() {
        sessionCache.clear();
    }

    /**

 * <li>{@link #deleteElevateWord(String, boolean)} - Delete an elevate word and optionally apply it.
 * <li>{@link #restoreElevateWord()} - Restore elevate words.
 * <li>{@link #deleteOldWords(ZonedDateTime)} - Delete old words based on a threshold date.
 * <li>{@link #setIndexName(String)} - Set the index name.