Package org.apache.hadoop.hdfs.security.token.delegation

Class DelegationTokenIdentifier

java.lang.Object

org.apache.hadoop.security.token.TokenIdentifier

org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier

org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier

All Implemented Interfaces:

org.apache.hadoop.io.Writable

Direct Known Subclasses:

DelegationTokenIdentifier.WebHdfsDelegationTokenIdentifier

@Private
public class DelegationTokenIdentifier
extends org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier

A delegation token identifier that is specific to HDFS.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DelegationTokenIdentifier.SWebHdfsDelegationTokenIdentifier
static class	DelegationTokenIdentifier.WebHdfsDelegationTokenIdentifier

Field Summary

Fields

Modifier and Type	Field	Description
static final org.apache.hadoop.io.Text	HDFS_DELEGATION_KIND

Constructor Summary

Constructors

Constructor	Description
DelegationTokenIdentifier()	Create an empty delegation token identifier for reading into.
DelegationTokenIdentifier(org.apache.hadoop.io.Text owner, org.apache.hadoop.io.Text renewer, org.apache.hadoop.io.Text realUser)	Create a new delegation token identifier

Method Summary

Modifier and Type	Method	Description
void	clearCache()
org.apache.hadoop.io.Text	getKind()
org.apache.hadoop.security.UserGroupInformation	getUser()
static String	stringifyToken(org.apache.hadoop.security.token.Token<?> token)
String	toString()
String	toStringStable()

Methods inherited from class org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier

equals, getIssueDate, getMasterKeyId, getMaxDate, getOwner, getRealUser, getRenewer, getSequenceNumber, hashCode, isEqual, readFields, setIssueDate, setMasterKeyId, setMaxDate, setOwner, setRealUser, setRenewer, setSequenceNumber, write

Methods inherited from class org.apache.hadoop.security.token.TokenIdentifier

getBytes, getTrackingId

Methods inherited from class java.lang.Object

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

Field Details

HDFS_DELEGATION_KIND

public static final org.apache.hadoop.io.Text HDFS_DELEGATION_KIND

Constructor Details

DelegationTokenIdentifier

public DelegationTokenIdentifier()

Create an empty delegation token identifier for reading into.

DelegationTokenIdentifier

public DelegationTokenIdentifier(org.apache.hadoop.io.Text owner,
 org.apache.hadoop.io.Text renewer,
 org.apache.hadoop.io.Text realUser)

Create a new delegation token identifier

Parameters:

owner - the effective username of the token owner

renewer - the username of the renewer

realUser - the real username of the token owner

Method Details

clearCache

@VisibleForTesting
public void clearCache()

getKind

public org.apache.hadoop.io.Text getKind()

Specified by:

getKind in class org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier

getUser

public org.apache.hadoop.security.UserGroupInformation getUser()

Overrides:

getUser in class org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier

toString

public String toString()

Overrides:

toString in class org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier

toStringStable

public String toStringStable()

Overrides:

toStringStable in class org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier

stringifyToken

public static String stringifyToken(org.apache.hadoop.security.token.Token<?> token)
                             throws IOException

Returns:

a string representation of the token

Throws:

IOException