org.apache.hadoop.mapreduce.security

类 TokenCache

java.lang.Object

org.apache.hadoop.mapreduce.security.TokenCache

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.

字段概要

字段

限定符和类型	字段和说明
static String	JOB_TOKEN_HDFS_FILE file name used on HDFS for generated job token
static String	JOB_TOKENS_FILENAME conf setting for job tokens cache file name

构造器概要

构造器

构造器和说明
TokenCache()

方法概要

方法

限定符和类型	方法和说明
static void	cleanUpTokenReferral(Configuration conf) Remove jobtoken referrals which don't make sense in the context of the task execution.
static Token<DelegationTokenIdentifier>	getDelegationToken(Credentials credentials, String namenode)
static Token<JobTokenIdentifier>	getJobToken(Credentials credentials)
static byte[]	getSecretKey(Credentials credentials, Text alias) auxiliary method to get user's secret keys..
static Credentials	loadTokens(String jobTokenFile, Configuration conf) load job token from a file
static void	obtainTokensForNamenodes(Credentials credentials, Path[] ps, Configuration conf) Convenience method to obtain delegation tokens from namenodes corresponding to the paths passed.
static void	setJobToken(Token<? extends TokenIdentifier> t, Credentials credentials) store job token

从类继承的方法 java.lang.Object

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

字段详细资料

JOB_TOKEN_HDFS_FILE

public static final String JOB_TOKEN_HDFS_FILE

file name used on HDFS for generated job token

另请参阅:

常量字段值

JOB_TOKENS_FILENAME

public static final String JOB_TOKENS_FILENAME

conf setting for job tokens cache file name

另请参阅:

常量字段值

构造器详细资料

TokenCache

public TokenCache()

方法详细资料

getSecretKey

public static byte[] getSecretKey(Credentials credentials,
                  Text alias)

auxiliary method to get user's secret keys..

参数:

alias -

返回:

secret key from the storage

obtainTokensForNamenodes

public static void obtainTokensForNamenodes(Credentials credentials,
                            Path[] ps,
                            Configuration conf)
                                     throws IOException

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

参数:

ps - array of paths

conf - configuration

抛出:

IOException

cleanUpTokenReferral

public static void cleanUpTokenReferral(Configuration conf)

Remove jobtoken referrals which don't make sense in the context of the task execution.

参数:

conf - configuration object.

getDelegationToken

public static Token<DelegationTokenIdentifier> getDelegationToken(Credentials credentials,
                                                  String namenode)

参数:

namenode -

返回:

delegation token

loadTokens

public static Credentials loadTokens(String jobTokenFile,
                     Configuration conf)
                              throws IOException

load job token from a file

参数:

conf -

抛出:

IOException

setJobToken

public static void setJobToken(Token<? extends TokenIdentifier> t,
               Credentials credentials)

store job token

参数:

t -

getJobToken

public static Token<JobTokenIdentifier> getJobToken(Credentials credentials)

返回:

job token