org.apache.hadoop.mapreduce.security

クラス TokenCache

java.lang.Object

org.apache.hadoop.mapreduce.security.TokenCache

@InterfaceAudience.Public
 @InterfaceStability.Evolving
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.

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
TokenCache()

メソッドのサマリー

修飾子とタイプ	メソッドと説明
static void	cleanUpTokenReferral(Configuration conf) Remove jobtoken referrals which don't make sense in the context of the task execution.
static byte[]	getSecretKey(org.apache.hadoop.security.Credentials credentials, Text alias) auxiliary method to get user's secret keys..
static void	obtainTokensForNamenodes(org.apache.hadoop.security.Credentials credentials, Path[] ps, Configuration conf) Convenience method to obtain delegation tokens from namenodes corresponding to the paths passed.

クラスから継承されたメソッド java.lang.Object

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

コンストラクタの詳細

TokenCache

public TokenCache()

メソッドの詳細

getSecretKey

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

auxiliary method to get user's secret keys..

パラメータ:

alias -

戻り値:

secret key from the storage

obtainTokensForNamenodes

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

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

パラメータ:

credentials -

ps - array of paths

conf - configuration

例外:

IOException

cleanUpTokenReferral

public static void cleanUpTokenReferral(Configuration conf)

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

パラメータ:

conf -