MultiDnsServerAddressStreamProvider Class — netty Architecture

Source Code

resolver-dns/src/main/java/io/netty/resolver/dns/MultiDnsServerAddressStreamProvider.java lines 24–53

public final class MultiDnsServerAddressStreamProvider implements DnsServerAddressStreamProvider {
    private final DnsServerAddressStreamProvider[] providers;

    /**
     * Create a new instance.
     * @param providers The providers to use for DNS resolution. They will be queried in order.
     */
    public MultiDnsServerAddressStreamProvider(List<DnsServerAddressStreamProvider> providers) {
        this.providers = providers.toArray(new DnsServerAddressStreamProvider[0]);
    }

    /**
     * Create a new instance.
     * @param providers The providers to use for DNS resolution. They will be queried in order.
     */
    public MultiDnsServerAddressStreamProvider(DnsServerAddressStreamProvider... providers) {
        this.providers = providers.clone();
    }

    @Override
    public DnsServerAddressStream nameServerAddressStream(String hostname) {
        for (DnsServerAddressStreamProvider provider : providers) {
            DnsServerAddressStream stream = provider.nameServerAddressStream(hostname);
            if (stream != null) {
                return stream;
            }
        }
        return null;
    }
}