org.apache.hadoop.security.token

Class Token<T extends TokenIdentifier>

java.lang.Object

org.apache.hadoop.security.token.Token<T>

All Implemented Interfaces:

Writable

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class Token<T extends TokenIdentifier>
extends Object
implements Writable

The client-side form of the token.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.commons.logging.Log	LOG

Constructor Summary

Constructors

Constructor and Description
Token() Default constructor
Token(byte[] identifier, byte[] password, Text kind, Text service) Construct a token from the components.
Token(Token<T> other) Clone a token.
Token(T id, SecretManager<T> mgr) Construct a token given a token identifier and a secret manager for the type of the token identifier.

Method Summary

Methods

Modifier and Type	Method and Description
void	cancel(Configuration conf) Cancel this delegation token
void	decodeFromUrlString(String newValue) Decode the given url safe string into this token.
T	decodeIdentifier() Get the token identifier object, or null if it could not be constructed (because the class could not be loaded, for example).
String	encodeToUrlString() Encode this token as a url safe string
boolean	equals(Object right)
byte[]	getIdentifier() Get the token identifier's byte representation
Text	getKind() Get the token kind
byte[]	getPassword() Get the token password/secret
Text	getService() Get the service on which the token is supposed to be used
int	hashCode()
boolean	isManaged() Is this token managed so that it can be renewed or cancelled?
void	readFields(DataInput in) Deserialize the fields of this object from in.
long	renew(Configuration conf) Renew this delegation token
void	setService(Text newService) Set the service on which the token is supposed to be used
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

Constructor Detail

Token

public Token(T id,
     SecretManager<T> mgr)

Construct a token given a token identifier and a secret manager for the type of the token identifier.

Parameters:

id - the token identifier

mgr - the secret manager

Token

public Token(byte[] identifier,
     byte[] password,
     Text kind,
     Text service)

Construct a token from the components.

Parameters:

identifier - the token identifier

password - the token's password

kind - the kind of token

service - the service for this token

Token

public Token()

Default constructor

Token

public Token(Token<T> other)

Clone a token.

Parameters:

other - the token to clone

Method Detail

getIdentifier

public byte[] getIdentifier()

Get the token identifier's byte representation

Returns:

the token identifier's byte representation

decodeIdentifier

public T decodeIdentifier()
                                           throws IOException

Get the token identifier object, or null if it could not be constructed (because the class could not be loaded, for example).

Returns:

the token identifier, or null

Throws:

IOException

getPassword

public byte[] getPassword()

Get the token password/secret

Returns:

the token password/secret

getKind

public Text getKind()

Get the token kind

Returns:

the kind of the token

getService

public Text getService()

Get the service on which the token is supposed to be used

Returns:

the service name

setService

public void setService(Text newService)

Set the service on which the token is supposed to be used

Parameters:

newService - the service name

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

encodeToUrlString

public String encodeToUrlString()
                         throws IOException

Encode this token as a url safe string

Returns:

the encoded string

Throws:

IOException

decodeFromUrlString

public void decodeFromUrlString(String newValue)
                         throws IOException

Decode the given url safe string into this token.

Parameters:

newValue - the encoded string

Throws:

IOException

equals

public boolean equals(Object right)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

isManaged

public boolean isManaged()
                  throws IOException

Is this token managed so that it can be renewed or cancelled?

Returns:

true, if it can be renewed and cancelled.

Throws:

IOException

renew

public long renew(Configuration conf)
           throws IOException,
                  InterruptedException

Renew this delegation token

Returns:

the new expiration time

Throws:

IOException

InterruptedException

cancel

public void cancel(Configuration conf)
            throws IOException,
                   InterruptedException

Cancel this delegation token

Throws:

IOException

InterruptedException