Package org.apache.hadoop.registry.server.dns

Class ReverseZoneUtils

java.lang.Object

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

public final class ReverseZoneUtils
extends java.lang.Object

Utilities for configuring reverse zones.

Method Summary

Modifier and Type	Method	Description
protected static java.lang.String	getReverseZoneNetworkAddress(java.lang.String baseIp, int range, int index)	Given a baseIp, range and index, return the network address for the reverse zone.
protected static long	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(java.lang.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 java.lang.String getReverseZoneNetworkAddress(java.lang.String baseIp,
                                                               int range,
                                                               int index)
                                                        throws java.net.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:

java.net.UnknownHostException - if an invalid ip is provided.

getSubnetCountForReverseZones

protected static long 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

@VisibleForTesting
protected static long[] splitIp(java.lang.String baseIp)
                         throws java.net.UnknownHostException

Throws:

java.net.UnknownHostException