org.apache.hadoop.yarn.util

Class RackResolver

java.lang.Object

org.apache.hadoop.yarn.util.RackResolver

@InterfaceAudience.LimitedPrivate(value={"YARN","MAPREDUCE"})
public final class RackResolver
extends Object

Method Summary

Modifier and Type	Method and Description
static void	init(org.apache.hadoop.conf.Configuration conf)
static List<org.apache.hadoop.net.Node>	resolve(org.apache.hadoop.conf.Configuration conf, List<String> hostNames) Utility method for getting a list of hostname resolved to a list of node in the network topology.
static org.apache.hadoop.net.Node	resolve(org.apache.hadoop.conf.Configuration conf, String hostName) Utility method for getting a hostname resolved to a node in the network topology.
static List<org.apache.hadoop.net.Node>	resolve(List<String> hostNames) Utility method for getting a list of hostname resolved to a list of node in the network topology.
static org.apache.hadoop.net.Node	resolve(String hostName) Utility method for getting a hostname resolved to a node in the network topology.

Methods inherited from class java.lang.Object

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

Method Detail

init

public static void init(org.apache.hadoop.conf.Configuration conf)

resolve

public static org.apache.hadoop.net.Node resolve(org.apache.hadoop.conf.Configuration conf,
                                                 String hostName)

Utility method for getting a hostname resolved to a node in the network topology. This method initializes the class with the right resolver implementation.

Parameters:

conf - configuration.

hostName - hostname.

Returns:

node Node after resolving the hostname

resolve

public static List<org.apache.hadoop.net.Node> resolve(org.apache.hadoop.conf.Configuration conf,
                                                       List<String> hostNames)

Utility method for getting a list of hostname resolved to a list of node in the network topology. This method initializes the class with the right resolver implementation.

Parameters:

conf - configuration.

hostNames - list of hostName.

Returns:

nodes Node after resolving the hostnames

resolve

public static org.apache.hadoop.net.Node resolve(String hostName)

Utility method for getting a hostname resolved to a node in the network topology. This method doesn't initialize the class. Call init(Configuration) explicitly.

Parameters:

hostName - host name.

Returns:

node Node after resolving the hostname

resolve

public static List<org.apache.hadoop.net.Node> resolve(List<String> hostNames)

Utility method for getting a list of hostname resolved to a list of node in the network topology. This method doesn't initialize the class. Call init(Configuration) explicitly.

Parameters:

hostNames - list of hostNames.

Returns:

nodes Node after resolving the hostnames