org.xbill.DNS
Interface Resolver

All Known Implementing Classes:

SimpleResolver, ExtendedResolver

public interface Resolver

Interface describing a resolver.

Method Summary

Message	send(Message query) Sends a message, and waits for a response
Object	sendAsync(Message query, ResolverListener listener) Asynchronously sends a message, registering a listener to receive a callback.
void	setEDNS(int level) Sets the EDNS version used on outgoing messages (only 0 is meaningful)
void	setIgnoreTruncation(boolean flag) Sets whether truncated responses will be returned
void	setPort(int port) Sets the port to communicate with on the server
void	setTCP(boolean flag) Sets whether TCP connections will be sent by default
void	setTimeout(int secs) Sets the amount of time to wait for a response before giving up
void	setTSIGKey(Name name, byte[] key) Specifies the TSIG key that messages will be signed with
void	setTSIGKey(String key) Specifies the TSIG key (with the same name as the local host) that messages will be signed with
void	setTSIGKey(String name, String key) Specifies the TSIG key that messages will be signed with

Method Detail

setPort

public void setPort(int port)

Sets the port to communicate with on the server

setTCP

public void setTCP(boolean flag)

Sets whether TCP connections will be sent by default

setIgnoreTruncation

public void setIgnoreTruncation(boolean flag)

Sets whether truncated responses will be returned

setEDNS

public void setEDNS(int level)

Sets the EDNS version used on outgoing messages (only 0 is meaningful)

setTSIGKey

public void setTSIGKey(Name name,
                       byte[] key)

Specifies the TSIG key that messages will be signed with

setTSIGKey

public void setTSIGKey(String name,
                       String key)

Specifies the TSIG key that messages will be signed with

setTSIGKey

public void setTSIGKey(String key)

Specifies the TSIG key (with the same name as the local host) that messages will be signed with

setTimeout

public void setTimeout(int secs)

Sets the amount of time to wait for a response before giving up

send

public Message send(Message query)
             throws IOException

Sends a message, and waits for a response

Returns:

The response

sendAsync

public Object sendAsync(Message query,
                        ResolverListener listener)

Asynchronously sends a message, registering a listener to receive a callback. Multiple asynchronous lookups can be performed in parallel. Since the callback may be invoked before the function returns, external synchronization is necessary.

Returns:

An identifier, which is also a parameter in the callback