Examples with SequentialDnsServerAddressStreamProvider io.netty.resolver.dns.SequentialDnsServerAddressStreamProvider used on opensource projects

Example 1 with SequentialDnsServerAddressStreamProvider

use of io.netty.resolver.dns.SequentialDnsServerAddressStreamProvider in project graylog2-server by Graylog2.

the class DnsClient method start.

public void start(String dnsServerIps) {
    LOG.debug("Attempting to start DNS client");
    final List<InetSocketAddress> iNetDnsServerIps = parseServerIpAddresses(dnsServerIps);
    nettyEventLoop = new NioEventLoopGroup();
    final DnsNameResolverBuilder dnsNameResolverBuilder = new DnsNameResolverBuilder(nettyEventLoop.next());
    dnsNameResolverBuilder.channelType(NioDatagramChannel.class).queryTimeoutMillis(queryTimeout);
    // Specify custom DNS servers if provided. If not, use those specified in local network adapter settings.
    if (CollectionUtils.isNotEmpty(iNetDnsServerIps)) {
        LOG.debug("Attempting to start DNS client with server IPs [{}] on port [{}] with timeout [{}]", dnsServerIps, DEFAULT_DNS_PORT, requestTimeout);
        final DnsServerAddressStreamProvider dnsServer = new SequentialDnsServerAddressStreamProvider(iNetDnsServerIps);
        dnsNameResolverBuilder.nameServerProvider(dnsServer);
    } else {
        LOG.debug("Attempting to start DNS client with the local network adapter DNS server address on port [{}] with timeout [{}]", DEFAULT_DNS_PORT, requestTimeout);
    }
    resolver = dnsNameResolverBuilder.build();
    LOG.debug("DNS client startup successful");
}