org.apache.hadoop.hdfs.tools

Class DelegationTokenFetcher

java.lang.Object

org.apache.hadoop.hdfs.tools.DelegationTokenFetcher

@InterfaceAudience.Private
public class DelegationTokenFetcher
extends Object

Fetch a DelegationToken from the current Namenode and store it in the specified file.

Constructor Summary

Constructors

Constructor and Description
DelegationTokenFetcher()

Method Summary

Methods

Modifier and Type	Method and Description
static void	cancelDelegationToken(String nnAddr, Token<DelegationTokenIdentifier> tok) Cancel a Delegation Token.
static Credentials	getDTfromRemote(String nnAddr, String renewer)
static void	main(String[] args) Command-line interface
static long	renewDelegationToken(String nnAddr, Token<DelegationTokenIdentifier> tok) Renew a Delegation Token.

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegationTokenFetcher

public DelegationTokenFetcher()

Method Detail

main

public static void main(String[] args)
                 throws Exception

Command-line interface

Throws:

Exception

getDTfromRemote

public static Credentials getDTfromRemote(String nnAddr,
                          String renewer)
                                   throws IOException

Throws:

IOException

renewDelegationToken

public static long renewDelegationToken(String nnAddr,
                        Token<DelegationTokenIdentifier> tok)
                                 throws IOException

Renew a Delegation Token.

Parameters:

nnAddr - the NameNode's address

tok - the token to renew

Returns:

the Date that the token will expire next.

Throws:

IOException

cancelDelegationToken

public static void cancelDelegationToken(String nnAddr,
                         Token<DelegationTokenIdentifier> tok)
                                  throws IOException

Cancel a Delegation Token.

Parameters:

nnAddr - the NameNode's address

tok - the token to cancel

Throws:

IOException