Interface DnsResolver

All Known Implementing Classes:

InMemoryDnsResolver, SystemDefaultDnsResolver

@Contract(threading=STATELESS)
public interface DnsResolver

Users may implement this interface to override the normal DNS lookup offered by the OS.

Since:

4.2

Method Summary

Modifier and Type	Method	Description
InetAddress[]	resolve(String host)	Returns the IP address for the specified host name, or null if the given host is not recognized or the associated IP address cannot be used to build an InetAddress instance.
default List<InetSocketAddress>	resolve(String host, int port)	Returns a list of InetSocketAddress for the given host with the given port.
String	resolveCanonicalHostname(String host)	Gets the fully qualified domain name for given host name.

Method Details

resolve

InetAddress[] resolve(String host)
               throws UnknownHostException

Returns the IP address for the specified host name, or null if the given host is not recognized or the associated IP address cannot be used to build an InetAddress instance.

Parameters:

host - The host name to be resolved by this resolver.

Returns:

The IP address associated to the given host name, or null if the host name is not known by the implementation class.

Throws:

UnknownHostException

See Also:

• InetAddress

resolveCanonicalHostname

String resolveCanonicalHostname(String host)
                         throws UnknownHostException

Gets the fully qualified domain name for given host name.

Throws:

UnknownHostException

Since:

5.0

resolve

default List<InetSocketAddress> resolve(String host,
 int port)
                                 throws UnknownHostException

Returns a list of InetSocketAddress for the given host with the given port.

Throws:

UnknownHostException

Since:

5.5

See Also:

• InetSocketAddress