* calling it should not be necessary with a high throughput cache. Only caches built with {@link
 * #removalListener removalListener}, {@link #expireAfterWrite expireAfterWrite}, {@link
 * #expireAfterAccess expireAfterAccess}, {@link #weakKeys weakKeys}, {@link #weakValues
 * weakValues}, or {@link #softValues softValues} perform periodic maintenance.
 *
 * <p>The caches produced by {@code CacheBuilder} are serializable, and the deserialized caches

            return value;
        }
        return request.getRemoteAddr();
    }

    /**
     * Gets a cached facet response for the given query.
     * Creates and caches the response if not already cached.
     *
     * @param query the search query
     * @return the facet response
     * @throws FessSystemException if facet data cannot be loaded
     */