org.apache.hadoop.registry.server.dns

Class ReverseZoneUtils

java.lang.Object

org.apache.hadoop.registry.server.dns.ReverseZoneUtils

public final class ReverseZoneUtils
extends Object

Utilities for configuring reverse zones.

Method Summary

Modifier and Type	Method and Description
protected static String	getReverseZoneNetworkAddress(String baseIp, int range, int index) Given a baseIp, range and index, return the network address for the reverse zone.
protected static int	getSubnetCountForReverseZones(org.apache.hadoop.conf.Configuration conf) When splitting the reverse zone, return the number of subnets needed, given the range and netmask.
protected static long[]	splitIp(String baseIp)

Methods inherited from class java.lang.Object

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

Method Detail

getReverseZoneNetworkAddress

protected static String getReverseZoneNetworkAddress(String baseIp,
                                                     int range,
                                                     int index)
                                              throws UnknownHostException

Given a baseIp, range and index, return the network address for the reverse zone.

Parameters:

baseIp - base ip address to perform calculations against.

range - number of ip addresses per subnet.

index - the index of the subnet to calculate.

Returns:

the calculated ip address.

Throws:

UnknownHostException - if an invalid ip is provided.

getSubnetCountForReverseZones

protected static int getSubnetCountForReverseZones(org.apache.hadoop.conf.Configuration conf)

When splitting the reverse zone, return the number of subnets needed, given the range and netmask.

Parameters:

conf - the Hadoop configuration.

Returns:

The number of subnets given the range and netmask.

splitIp

protected static long[] splitIp(String baseIp)
                         throws UnknownHostException

Throws:

UnknownHostException