Package org.apache.hadoop.hdfs

Class HAUtilClient

java.lang.Object

org.apache.hadoop.hdfs.HAUtilClient

@Private
public class HAUtilClient
extends Object

Constructor Summary

Constructors

Constructor	Description
HAUtilClient()

Method Summary

Modifier and Type	Method	Description
static org.apache.hadoop.io.Text	buildTokenServiceForLogicalUri(URI uri, String scheme)	Get the service name used in the delegation token for the given logical HA service.
static String	buildTokenServicePrefixForLogicalUri(String scheme)
static void	cloneDelegationTokenForLogicalUri(org.apache.hadoop.security.UserGroupInformation ugi, URI haUri, Collection<InetSocketAddress> nnAddrs)	Locate a delegation token associated with the given HA cluster URI, and if one is found, clone it to also represent the underlying namenode address.
static URI	getServiceUriFromToken(String scheme, org.apache.hadoop.security.token.Token<?> token)	Parse the file system URI out of the provided token.
static boolean	isClientFailoverConfigured(org.apache.hadoop.conf.Configuration conf, URI nameNodeUri)	Check whether the client has a failover proxy provider configured for the namenode/nameservice.
static boolean	isLogicalUri(org.apache.hadoop.conf.Configuration conf, URI nameNodeUri)
static boolean	isTokenForLogicalUri(org.apache.hadoop.security.token.Token<?> token)

Methods inherited from class java.lang.Object

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

Constructor Details

HAUtilClient

public HAUtilClient()

Method Details

isLogicalUri

public static boolean isLogicalUri(org.apache.hadoop.conf.Configuration conf,
 URI nameNodeUri)

Returns:

true if the given nameNodeUri appears to be a logical URI.

isClientFailoverConfigured

public static boolean isClientFailoverConfigured(org.apache.hadoop.conf.Configuration conf,
 URI nameNodeUri)

Check whether the client has a failover proxy provider configured for the namenode/nameservice.

Parameters:

conf - Configuration

nameNodeUri - The URI of namenode

Returns:

true if failover is configured.

buildTokenServiceForLogicalUri

public static org.apache.hadoop.io.Text buildTokenServiceForLogicalUri(URI uri,
 String scheme)

Get the service name used in the delegation token for the given logical HA service.

Parameters:

uri - the logical URI of the cluster

scheme - the scheme of the corresponding FileSystem

Returns:

the service name

buildTokenServicePrefixForLogicalUri

public static String buildTokenServicePrefixForLogicalUri(String scheme)

getServiceUriFromToken

public static URI getServiceUriFromToken(String scheme,
 org.apache.hadoop.security.token.Token<?> token)

Parse the file system URI out of the provided token.

isTokenForLogicalUri

public static boolean isTokenForLogicalUri(org.apache.hadoop.security.token.Token<?> token)

Returns:

true if this token corresponds to a logical nameservice rather than a specific namenode.

cloneDelegationTokenForLogicalUri

public static void cloneDelegationTokenForLogicalUri(org.apache.hadoop.security.UserGroupInformation ugi,
 URI haUri,
 Collection<InetSocketAddress> nnAddrs)

Locate a delegation token associated with the given HA cluster URI, and if one is found, clone it to also represent the underlying namenode address.

Parameters:

ugi - the UGI to modify

haUri - the logical URI for the cluster

nnAddrs - collection of NNs in the cluster to which the token applies