}
    UniAddress getFirstAddress() throws UnknownHostException {
        addressIndex = 0;

        String host = url.getHost();
        String path = url.getPath();
        String query = url.getQuery();

        if( query != null ) {
            String server = queryLookup( query, "server" );
            if( server != null && server.length() > 0 ) {
                addresses = new UniAddress[1];

        UserCQ cq = new UserCQ();
        if (queryLambda != null) {
            queryLambda.callback(cq);
        }
        FilterAggregationBuilder builder = regFilterA(name, cq.getQuery());
        if (opLambda != null) {
            opLambda.callback(builder);
        }
        if (aggsLambda != null) {
            UserCA ca = new UserCA();
            aggsLambda.callback(ca);