org.apache.hadoop.security.token

Class TokenRenewer

java.lang.Object

org.apache.hadoop.security.token.TokenRenewer

Direct Known Subclasses:

Token.TrivialRenewer

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public abstract class TokenRenewer
extends Object

This is the interface for plugins that handle tokens.

Constructor Summary

Constructors

Constructor and Description
TokenRenewer()

Method Summary

Modifier and Type	Method and Description
abstract void	cancel(Token<?> token, Configuration conf) Cancel the given token.
abstract boolean	handleKind(Text kind) Does this renewer handle this kind of token?
abstract boolean	isManaged(Token<?> token) Is the given token managed? Only managed tokens may be renewed or cancelled.
abstract long	renew(Token<?> token, Configuration conf) Renew the given token.

Methods inherited from class java.lang.Object

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

Constructor Detail

TokenRenewer

public TokenRenewer()

Method Detail

handleKind

public abstract boolean handleKind(Text kind)

Does this renewer handle this kind of token?

Parameters:

kind - the kind of the token

Returns:

true if this renewer can renew it

isManaged

public abstract boolean isManaged(Token<?> token)
                           throws IOException

Is the given token managed? Only managed tokens may be renewed or cancelled.

Parameters:

token - the token being checked

Returns:

true if the token may be renewed or cancelled

Throws:

IOException - raised on errors performing I/O.

renew

public abstract long renew(Token<?> token,
                           Configuration conf)
                    throws IOException,
                           InterruptedException

Renew the given token.

Parameters:

token - the token being checked.

conf - configuration.

Returns:

the new expiration time.

Throws:

IOException - raised on errors performing I/O.

InterruptedException - thrown when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted, either before or during the activity.

cancel

public abstract void cancel(Token<?> token,
                            Configuration conf)
                     throws IOException,
                            InterruptedException

Cancel the given token.

Parameters:

token - the token being checked.

conf - configuration.

Throws:

IOException - raised on errors performing I/O.

InterruptedException - thrown when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted, either before or during the activity.