org.apache.hadoop.hdfs.security.token.delegation

Class DelegationTokenSelector

java.lang.Object

org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSelector<DelegationTokenIdentifier>

org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSelector

All Implemented Interfaces:

TokenSelector<DelegationTokenIdentifier>

@InterfaceAudience.Private
public class DelegationTokenSelector
extends AbstractDelegationTokenSelector<DelegationTokenIdentifier>

A delegation token that is specialized for HDFS

Field Summary

Fields

Modifier and Type	Field and Description
static String	SERVICE_NAME_KEY

Constructor Summary

Constructors

Constructor and Description
DelegationTokenSelector()

Method Summary

Methods

Modifier and Type	Method and Description
Token<DelegationTokenIdentifier>	selectToken(URI nnUri, Collection<Token<?>> tokens, Configuration conf) Select the delegation token for hdfs.

Methods inherited from class org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSelector

selectToken

Methods inherited from class java.lang.Object

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

Field Detail

SERVICE_NAME_KEY

public static final String SERVICE_NAME_KEY

See Also:

Constant Field Values

Constructor Detail

DelegationTokenSelector

public DelegationTokenSelector()

Method Detail

selectToken

public Token<DelegationTokenIdentifier> selectToken(URI nnUri,
                                           Collection<Token<?>> tokens,
                                           Configuration conf)

Select the delegation token for hdfs. The port will be rewritten to the port of hdfs.service.host_$nnAddr, or the default rpc namenode port. This method should only be called by non-hdfs filesystems that do not use the rpc port to acquire tokens. Ex. webhdfs, hftp

Parameters:

nnUri - of the remote namenode

tokens - as a collection

conf - hadoop configuration

Returns:

Token