com.hs.mail.dns
Class DnsServer

java.lang.Object
  com.hs.mail.dns.DnsServer

All Implemented Interfaces:

org.springframework.beans.factory.InitializingBean

public class DnsServer
extends Object
implements org.springframework.beans.factory.InitializingBean

Provides DNS client functionality.

Field Summary

protected org.xbill.DNS.Resolver

resolver A resolver instance used to retrieve DNS records.

Constructor Summary

DnsServer()

Method Summary

void	afterPropertiesSet()
Collection<String>	findMXRecords(String hostname) Return a prioritized unmodifiable list of host handling mail for the domain.
List<String>	findMXRecordsRaw(String hostname) Return a prioritized unmodifiable list of MX records obtained from the server.
static InetAddress[]	getAllByName(String host)
static InetAddress	getByName(String host)
String[]	getDnsServers()
Iterator<HostAddress>	getSmtpHostAddress(String domainName)
org.xbill.DNS.Record[]	lookup(String name, int type) Looks up DNS records of the specified type for the specified name.
protected org.xbill.DNS.Record[]	processSetResponse(org.xbill.DNS.SetResponse sr)
void	setDnsServers(List<String> dnsServers)

Methods inherited from class java.lang.Object

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

Field Detail

resolver

protected org.xbill.DNS.Resolver resolver

A resolver instance used to retrieve DNS records.

Constructor Detail

DnsServer

public DnsServer()

Method Detail

getDnsServers

public String[] getDnsServers()

setDnsServers

public void setDnsServers(List<String> dnsServers)

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Throws:

Exception

findMXRecordsRaw

public List<String> findMXRecordsRaw(String hostname)

Return a prioritized unmodifiable list of MX records obtained from the server.

Parameters:

hostname - domain name to look up

Returns:

a list of MX records corresponding to this mail domain

findMXRecords

public Collection<String> findMXRecords(String hostname)

Return a prioritized unmodifiable list of host handling mail for the domain.

First lookup MX hosts, then MX hosts of the CNAME adress, and if no server is found return the IP of the hostname

Parameters:

hostname - domain name to look up

Returns:

a unmodifiable list of handling servers corresponding to this mail domain name

lookup

public org.xbill.DNS.Record[] lookup(String name,
                                     int type)

Looks up DNS records of the specified type for the specified name. This method is a public wrapper for the private implementation method

Parameters:

name - the name of the host to be looked up

type - the type of record desired

processSetResponse

protected org.xbill.DNS.Record[] processSetResponse(org.xbill.DNS.SetResponse sr)

getSmtpHostAddress

public Iterator<HostAddress> getSmtpHostAddress(String domainName)

getByName

public static InetAddress getByName(String host)
                             throws UnknownHostException

Throws:

UnknownHostException

See Also:

InetAddress.getByName(String)

getAllByName

public static InetAddress[] getAllByName(String host)
                                  throws UnknownHostException

Throws:

UnknownHostException

See Also:

java.net.InetAddress#getByAllName(String)