* <p>
     * Initially, the SIDs within each ACE will not be resolved however when
     * {@code getType()}, {@code getDomainName()}, {@code getAccountName()},
     * or {@code toString()} is called, the names will attempt to be
     * resolved. If the names cannot be resolved (e.g. due to temporary
     * network failure), the said methods will return default values (usually

            log.trace("Using cached attributes (expires in {}ms)", this.attrExpiration - currentTime);
            return this.isExists;
        }

        // Fast path for already resolved existence with recent cache
        if (this.isExists && (currentTime - (this.attrExpiration - getContext().getConfig().getAttributeCacheTimeout())) < 5000) {
            log.trace("Using recent positive existence cache");

            <![CDATA[
            The version requirement of the dependency, e.g. {@code 3.2.1}. The actual version will be resolved based on the usage context.
            Version requirement can also be specified as a range of versions, e.g. {@code [3.2.0,)}. This is discouraged as it may break <i>predictability</i> of resolved version.
            See <a href="https://s.apache.org/dependency-version">dependency version requirement documentation</a>

     */
    public void usePipeline() {
        usePipeline = true;
    }

    /**
     * Resolves a hostname to an InetAddress.
     *
     * @param host the hostname to resolve
     * @return the resolved InetAddress
     * @throws FessSystemException if hostname resolution fails
     */
    protected InetAddress getInetAddressByName(final String host) {
        try {
            return InetAddress.getByName(host);