| Class | Description | 
|---|---|
| DelegationTokenAuthenticatedURL | The  DelegationTokenAuthenticatedURLis aAuthenticatedURLsub-class with built-in Hadoop Delegation Token
 functionality. | 
| DelegationTokenAuthenticatedURL.Token | Client side authentication token that handles Delegation Tokens. | 
| DelegationTokenAuthenticator | Authenticatorwrapper that enhances anAuthenticatorwith
 Delegation Token support. | 
| KerberosDelegationTokenAuthenticator | The  KerberosDelegationTokenAuthenticatorprovides support for
 Kerberos SPNEGO authentication mechanism and support for Hadoop Delegation
 Token operations. | 
| PseudoDelegationTokenAuthenticator | The  PseudoDelegationTokenAuthenticatorprovides support for
 Hadoop's pseudo authentication mechanism that accepts
 the user name specified as a query string parameter and support for Hadoop
 Delegation Token operations. | 
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