io.netty.resolver.dns

Class DnsServerAddresses

java.lang.Object

io.netty.resolver.dns.DnsServerAddresses

public abstract class DnsServerAddresses
extends Object

Provides an infinite sequence of DNS server addresses to DnsNameResolver.

Constructor Summary

Constructors

Constructor and Description
DnsServerAddresses()

Method Summary

Methods

Modifier and Type	Method and Description
static DnsServerAddresses	defaultAddresses() Returns the DnsServerAddresses that yields the system DNS server addresses sequentially.
static List<InetSocketAddress>	defaultAddressList() Returns the list of the system DNS server addresses.
static DnsServerAddresses	rotational(InetSocketAddress... addresses) Returns the DnsServerAddresses that yields the specified addresses in a rotational sequential order.
static DnsServerAddresses	rotational(Iterable<? extends InetSocketAddress> addresses) Returns the DnsServerAddresses that yields the specified addresses in a rotational sequential order.
static DnsServerAddresses	sequential(InetSocketAddress... addresses) Returns the DnsServerAddresses that yields the specified addresses sequentially.
static DnsServerAddresses	sequential(Iterable<? extends InetSocketAddress> addresses) Returns the DnsServerAddresses that yields the specified addresses sequentially.
static DnsServerAddresses	shuffled(InetSocketAddress... addresses) Returns the DnsServerAddresses that yields the specified addresses in a shuffled order.
static DnsServerAddresses	shuffled(Iterable<? extends InetSocketAddress> addresses) Returns the DnsServerAddresses that yields the specified address in a shuffled order.
static DnsServerAddresses	singleton(InetSocketAddress address) Returns the DnsServerAddresses that yields only a single address.
abstract DnsServerAddressStream	stream() Starts a new infinite stream of DNS server addresses.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DnsServerAddresses

public DnsServerAddresses()

Method Detail

defaultAddressList

public static List<InetSocketAddress> defaultAddressList()

Returns the list of the system DNS server addresses. If it failed to retrieve the list of the system DNS server addresses from the environment, it will return "8.8.8.8" and "8.8.4.4", the addresses of the Google public DNS servers.

defaultAddresses

public static DnsServerAddresses defaultAddresses()

Returns the DnsServerAddresses that yields the system DNS server addresses sequentially. If it failed to retrieve the list of the system DNS server addresses from the environment, it will use "8.8.8.8" and "8.8.4.4", the addresses of the Google public DNS servers.

This method has the same effect with the following code:

 DnsServerAddresses.sequential(DnsServerAddresses.defaultAddressList());
 

sequential

public static DnsServerAddresses sequential(Iterable<? extends InetSocketAddress> addresses)

Returns the DnsServerAddresses that yields the specified addresses sequentially. Once the last address is yielded, it will start again from the first address.

sequential

public static DnsServerAddresses sequential(InetSocketAddress... addresses)

Returns the DnsServerAddresses that yields the specified addresses sequentially. Once the last address is yielded, it will start again from the first address.

shuffled

public static DnsServerAddresses shuffled(Iterable<? extends InetSocketAddress> addresses)

Returns the DnsServerAddresses that yields the specified address in a shuffled order. Once all addresses are yielded, the addresses are shuffled again.

shuffled

public static DnsServerAddresses shuffled(InetSocketAddress... addresses)

Returns the DnsServerAddresses that yields the specified addresses in a shuffled order. Once all addresses are yielded, the addresses are shuffled again.

rotational

public static DnsServerAddresses rotational(Iterable<? extends InetSocketAddress> addresses)

Returns the DnsServerAddresses that yields the specified addresses in a rotational sequential order. It is similar to sequential(Iterable), but each DnsServerAddressStream starts from a different starting point. For example, the first stream() will start from the first address, the second one will start from the second address, and so on.

rotational

public static DnsServerAddresses rotational(InetSocketAddress... addresses)

Returns the DnsServerAddresses that yields the specified addresses in a rotational sequential order. It is similar to sequential(Iterable), but each DnsServerAddressStream starts from a different starting point. For example, the first stream() will start from the first address, the second one will start from the second address, and so on.

singleton

public static DnsServerAddresses singleton(InetSocketAddress address)

Returns the DnsServerAddresses that yields only a single address.

stream

public abstract DnsServerAddressStream stream()

Starts a new infinite stream of DNS server addresses. This method is invoked by DnsNameResolver on every uncached SimpleNameResolver.resolve(String)or SimpleNameResolver.resolveAll(String).