AuthoritativeNameServer Class — netty Architecture

Source Code

resolver-dns/src/main/java/io/netty/resolver/dns/DnsResolveContext.java lines 1434–1480

    private static final class AuthoritativeNameServer {
        private final int dots;
        private final String domainName;
        final boolean isCopy;
        final String nsName;

        private long ttl;
        private InetSocketAddress address;

        AuthoritativeNameServer next;

        AuthoritativeNameServer(int dots, long ttl, String domainName, String nsName) {
            this.dots = dots;
            this.ttl = ttl;
            this.nsName = nsName;
            this.domainName = domainName;
            isCopy = false;
        }

        AuthoritativeNameServer(AuthoritativeNameServer server) {
            dots = server.dots;
            ttl = server.ttl;
            nsName = server.nsName;
            domainName = server.domainName;
            isCopy = true;
        }

        /**
         * Returns {@code true} if its a root server.
         */
        boolean isRootServer() {
            return dots == 1;
        }

        /**
         * Update the server with the given address and TTL if needed.
         */
        void update(InetSocketAddress address, long ttl) {
            assert this.address == null || this.address.isUnresolved();
            this.address = address;
            this.ttl = min(this.ttl, ttl);
        }

        void update(InetSocketAddress address) {
            update(address, Long.MAX_VALUE);
        }
    }