org.apache.hadoop.security

类 Credentials

java.lang.Object

org.apache.hadoop.security.Credentials

所有已实现的接口:

Writable

public class Credentials
extends Object
implements Writable

A class that provides the facilities of reading and writing secret keys and Tokens.

构造器概要

构造器

构造器和说明
Credentials()

方法概要

方法

限定符和类型	方法和说明
void	addAll(Credentials other) Copy all of the credentials from one credential object into another.
void	addSecretKey(Text alias, byte[] key) Set the key for an alias
void	addToken(Text alias, Token<? extends TokenIdentifier> t) Add a token in the storage (in memory)
Collection<Token<? extends TokenIdentifier>>	getAllTokens() Return all the tokens in the in-memory map
byte[]	getSecretKey(Text alias) Returns the key bytes for the alias
Token<? extends TokenIdentifier>	getToken(Text alias) Returns the Token object for the alias
int	numberOfSecretKeys()
int	numberOfTokens()
void	readFields(DataInput in) Loads all the keys
static Credentials	readTokenStorageFile(Path filename, Configuration conf) Convenience method for reading a token storage file, and loading the Tokens therein in the passed UGI
void	readTokenStorageStream(DataInputStream in) Convenience method for reading a token storage file directly from a datainputstream
void	write(DataOutput out) Stores all the keys to DataOutput
void	writeTokenStorageFile(Path filename, Configuration conf)
void	writeTokenStorageToStream(DataOutputStream os)

从类继承的方法 java.lang.Object

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

构造器详细资料

Credentials

public Credentials()

方法详细资料

getSecretKey

public byte[] getSecretKey(Text alias)

Returns the key bytes for the alias

参数:

alias - the alias for the key

返回:

key for this alias

getToken

public Token<? extends TokenIdentifier> getToken(Text alias)

Returns the Token object for the alias

参数:

alias - the alias for the Token

返回:

token for this alias

addToken

public void addToken(Text alias,
            Token<? extends TokenIdentifier> t)

Add a token in the storage (in memory)

参数:

alias - the alias for the key

t - the token object

getAllTokens

public Collection<Token<? extends TokenIdentifier>> getAllTokens()

Return all the tokens in the in-memory map

numberOfTokens

public int numberOfTokens()

返回:

number of Tokens in the in-memory map

numberOfSecretKeys

public int numberOfSecretKeys()

返回:

number of keys in the in-memory map

addSecretKey

public void addSecretKey(Text alias,
                byte[] key)

Set the key for an alias

参数:

alias - the alias for the key

key - the key bytes

readTokenStorageFile

public static Credentials readTokenStorageFile(Path filename,
                               Configuration conf)
                                        throws IOException

Convenience method for reading a token storage file, and loading the Tokens therein in the passed UGI

参数:

filename -

conf -

抛出:

IOException

readTokenStorageStream

public void readTokenStorageStream(DataInputStream in)
                            throws IOException

Convenience method for reading a token storage file directly from a datainputstream

抛出:

IOException

writeTokenStorageToStream

public void writeTokenStorageToStream(DataOutputStream os)
                               throws IOException

抛出:

IOException

writeTokenStorageFile

public void writeTokenStorageFile(Path filename,
                         Configuration conf)
                           throws IOException

抛出:

IOException

write

public void write(DataOutput out)
           throws IOException

Stores all the keys to DataOutput

指定者:

write 在接口中 Writable

参数:

out -

抛出:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Loads all the keys

指定者:

readFields 在接口中 Writable

参数:

in -

抛出:

IOException

addAll

public void addAll(Credentials other)

Copy all of the credentials from one credential object into another.

参数:

other - the credentials to copy