org.minidns.iterative

Class ReliableDnsClient

java.lang.Object

org.minidns.AbstractDnsClient

org.minidns.iterative.ReliableDnsClient

public class ReliableDnsClient
extends org.minidns.AbstractDnsClient

A DNS client using a reliable strategy. First the configured resolver of the system are used, then, in case there is no answer, a fall back to iterative resolving is performed.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReliableDnsClient.Mode

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

org.minidns.AbstractDnsClient.IpVersionSetting

Field Summary

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
ReliableDnsClient()
ReliableDnsClient(org.minidns.DnsCache dnsCache)

Method Summary

Modifier and Type	Method and Description
protected java.lang.String	isResponseAcceptable(org.minidns.dnsmessage.DnsMessage response) Check if the response from the system's nameserver is acceptable.
protected boolean	isResponseCacheable(org.minidns.dnsmessage.Question q, org.minidns.dnsmessage.DnsMessage dnsMessage)
protected org.minidns.dnsmessage.DnsMessage.Builder	newQuestion(org.minidns.dnsmessage.DnsMessage.Builder questionMessage)
protected org.minidns.dnsmessage.DnsMessage	query(org.minidns.dnsmessage.DnsMessage.Builder q)
void	setDataSource(org.minidns.source.DnsDataSource dataSource)
void	setMode(ReliableDnsClient.Mode mode) Set the mode used when resolving queries.

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, setDefaultIpVersion, setPreferedIpVersion

Methods inherited from class java.lang.Object

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

Constructor Detail

ReliableDnsClient

public ReliableDnsClient(org.minidns.DnsCache dnsCache)

ReliableDnsClient

public ReliableDnsClient()

Method Detail

query

protected org.minidns.dnsmessage.DnsMessage query(org.minidns.dnsmessage.DnsMessage.Builder q)
                                           throws java.io.IOException

Specified by:

query in class org.minidns.AbstractDnsClient

Throws:

java.io.IOException

newQuestion

protected org.minidns.dnsmessage.DnsMessage.Builder newQuestion(org.minidns.dnsmessage.DnsMessage.Builder questionMessage)

Specified by:

newQuestion in class org.minidns.AbstractDnsClient

isResponseCacheable

protected boolean isResponseCacheable(org.minidns.dnsmessage.Question q,
                                      org.minidns.dnsmessage.DnsMessage dnsMessage)

Overrides:

isResponseCacheable in class org.minidns.AbstractDnsClient

isResponseAcceptable

protected java.lang.String isResponseAcceptable(org.minidns.dnsmessage.DnsMessage response)

Check if the response from the system's nameserver is acceptable. Must return null if the response is acceptable, or a String describing why it is not acceptable. If the response is not acceptable then ReliableDnsClient will fall back to resolve the query iteratively.

Parameters:

response - the response we got from the system's nameserver.

Returns:

null if the response is acceptable, or a String if not.

setDataSource

public void setDataSource(org.minidns.source.DnsDataSource dataSource)

Overrides:

setDataSource in class org.minidns.AbstractDnsClient

setMode

public void setMode(ReliableDnsClient.Mode mode)

Set the mode used when resolving queries.

Parameters:

mode - the mode to use.