org.jasen.net
Class JasenDNSResolver

java.lang.Object
  org.jasen.net.JasenDNSResolver

All Implemented Interfaces:

DNSResolver

public class JasenDNSResolver

extends Object

implements DNSResolver

Simple implementation of a DNS resolver.

This class does NOT use any caching etc.

This is the default DNS resolver, however if caching etc is required, it is recommended that an alternate resolver be used

Author:

Jason Polites

Constructor Summary

JasenDNSResolver()

Method Summary

Attributes

lookup(String host, String type) Performs a DNS lookup to retrieve the DNS records for the given host.

Methods inherited from class java.lang.Object

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

Constructor Detail

JasenDNSResolver

public JasenDNSResolver()

Method Detail

lookup

public Attributes lookup(String host,
                         String type)
                  throws NamingException

Description copied from interface: DNSResolver

Performs a DNS lookup to retrieve the DNS records for the given host.

The type parameter represents the record type. For example:

 lookup("microsoft.com", "A")
 

Will return all the "A" records for microsoft.com

The jASEN engine will use this DNS resolver if specified, otherwise the internal DNS resolver will be used

Specified by:

lookup in interface DNSResolver

Parameters:

host - The web host to lookup

type - The type of DNS entry to be returned (eg. A or MX)

Returns:

The attributes of the registered DNS entry for the given host

Throws:

NamingException - If the name could not be found