* Gets the maximum session cache size.
     *
     * @return the maximum session cache size
     */
    protected int getMaxSessionSize() {
        final int value = ComponentUtil.getFessConfig().getRagChatSessionMaxSizeAsInteger();
        if (value <= 0) {
            logger.warn("Invalid max session size: {}. Using default: 100", value);
            return 100;
        }
        return value;
    }

    /**