}

    public void usePipeline() {
        this.usePipeline = true;
    }

    protected InetAddress getInetAddressByName(final String host) {
        try {
            return InetAddress.getByName(host);
        } catch (final UnknownHostException e) {
            throw new FessSystemException("Failed to resolve the hostname: " + host, e);
        }
    }

    @PostConstruct
    public void open() {