org.apache.tez.common.security
Class TokenCache

java.lang.Object
  org.apache.tez.common.security.TokenCache

@InterfaceAudience.Private
@InterfaceStability.Unstable
public class TokenCache
extends Object

This class provides user facing APIs for transferring secrets from the job client to the tasks. The secrets can be stored just before submission of jobs and read during the task execution.

Constructor Summary

TokenCache()

Method Summary

static byte[]	getSecretKey(org.apache.hadoop.security.Credentials credentials, org.apache.hadoop.io.Text alias) auxiliary method to get user's secret keys..
static org.apache.hadoop.security.token.Token<JobTokenIdentifier>	getSessionToken(org.apache.hadoop.security.Credentials credentials)
static void	obtainTokensForFileSystems(org.apache.hadoop.security.Credentials credentials, org.apache.hadoop.fs.Path[] ps, org.apache.hadoop.conf.Configuration conf) Convenience method to obtain delegation tokens from namenodes corresponding to the paths passed.
static void	setSessionToken(org.apache.hadoop.security.token.Token<? extends org.apache.hadoop.security.token.TokenIdentifier> t, org.apache.hadoop.security.Credentials credentials) store session specific token

Methods inherited from class java.lang.Object

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

Constructor Detail

TokenCache

public TokenCache()

Method Detail

getSecretKey

public static byte[] getSecretKey(org.apache.hadoop.security.Credentials credentials,
                                  org.apache.hadoop.io.Text alias)

auxiliary method to get user's secret keys..

Parameters:

alias -

Returns:

secret key from the storage

obtainTokensForFileSystems

public static void obtainTokensForFileSystems(org.apache.hadoop.security.Credentials credentials,
                                              org.apache.hadoop.fs.Path[] ps,
                                              org.apache.hadoop.conf.Configuration conf)
                                       throws IOException

Convenience method to obtain delegation tokens from namenodes corresponding to the paths passed.

Parameters:

credentials -

ps - array of paths

conf - configuration

Throws:

IOException

setSessionToken

@InterfaceAudience.Private
public static void setSessionToken(org.apache.hadoop.security.token.Token<? extends org.apache.hadoop.security.token.TokenIdentifier> t,
                                                             org.apache.hadoop.security.Credentials credentials)

store session specific token

Parameters:

t -

getSessionToken

@InterfaceAudience.Private
public static org.apache.hadoop.security.token.Token<JobTokenIdentifier> getSessionToken(org.apache.hadoop.security.Credentials credentials)

Returns:

session token