org.minidns.iterative

Class IterativeDnsClient

java.lang.Object

org.minidns.AbstractDnsClient

org.minidns.iterative.IterativeDnsClient

public class IterativeDnsClient
extends AbstractDnsClient

Nested Class Summary

Nested classes/interfaces inherited from class org.minidns.AbstractDnsClient

AbstractDnsClient.IpVersionSetting

Field Summary

Fields

Modifier and Type	Field and Description
protected static Inet4Address[]	IPV4_ROOT_SERVERS
protected static Inet6Address[]	IPV6_ROOT_SERVERS

Fields inherited from class org.minidns.AbstractDnsClient

cache, dataSource, DEFAULT_CACHE, DEFAULT_IP_VERSION_SETTING, insecureRandom, ipVersionSetting, LOGGER, random

Constructor Summary

Constructors

Constructor and Description
IterativeDnsClient() Create a new recursive DNS client using the global default cache.
IterativeDnsClient(DnsCache cache) Create a new recursive DNS client with the given DNS cache.

Method Summary

Modifier and Type	Method and Description
protected static void	abortIfFatal(IOException ioException)
static List<InetAddress>	getRootServer(char rootServerId)
static List<InetAddress>	getRootServer(char rootServerId, AbstractDnsClient.IpVersionSetting setting)
protected boolean	isResponseCacheable(Question q, DnsMessage dnsMessage) Whether a response from the DNS system should be cached or not.
protected DnsMessage.Builder	newQuestion(DnsMessage.Builder message)
protected DnsMessage	query(DnsMessage.Builder queryBuilder) Recursively query the DNS system for one entry.

Methods inherited from class org.minidns.AbstractDnsClient

getCache, getCachedIPv4AddressesFor, getCachedIPv4NameserverAddressesFor, getCachedIPv6AddressesFor, getCachedIPv6NameserverAddressesFor, getCachedNameserverRecordsFor, getDataSource, getPreferedIpVersion, getQueryFor, query, query, query, query, query, query, query, query, query, query, query, queryAsync, queryAsync, queryAsync, queryAsync, queryAsync, setDataSource, setDefaultIpVersion, setPreferedIpVersion

Methods inherited from class java.lang.Object

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

Field Detail

IPV4_ROOT_SERVERS

protected static final Inet4Address[] IPV4_ROOT_SERVERS

IPV6_ROOT_SERVERS

protected static final Inet6Address[] IPV6_ROOT_SERVERS

Constructor Detail

IterativeDnsClient

public IterativeDnsClient()

Create a new recursive DNS client using the global default cache.

IterativeDnsClient

public IterativeDnsClient(DnsCache cache)

Create a new recursive DNS client with the given DNS cache.

Parameters:

cache - The backend DNS cache.

Method Detail

query

protected DnsMessage query(DnsMessage.Builder queryBuilder)
                    throws IOException

Recursively query the DNS system for one entry.

Specified by:

query in class AbstractDnsClient

Parameters:

queryBuilder - The query DNS message builder.

Returns:

The response (or null on timeout/error).

Throws:

IOException - if an IO error occurs.

getRootServer

public static List<InetAddress> getRootServer(char rootServerId)

getRootServer

public static List<InetAddress> getRootServer(char rootServerId,
                                              AbstractDnsClient.IpVersionSetting setting)

isResponseCacheable

protected boolean isResponseCacheable(Question q,
                                      DnsMessage dnsMessage)

Description copied from class: AbstractDnsClient

Whether a response from the DNS system should be cached or not.

Overrides:

isResponseCacheable in class AbstractDnsClient

Parameters:

q - The question the response message should answer.

dnsMessage - The response message received using the DNS client.

Returns:

True, if the response should be cached, false otherwise.

newQuestion

protected DnsMessage.Builder newQuestion(DnsMessage.Builder message)

Specified by:

newQuestion in class AbstractDnsClient

abortIfFatal

protected static void abortIfFatal(IOException ioException)
                            throws IOException

Throws:

IOException