| Interface | Description | 
|---|---|
| Authenticator | Interface for client authentication mechanisms. | 
| ConnectionConfigurator | Interface to configure   HttpURLConnectioncreated byAuthenticatedURLinstances. | 
| Class | Description | 
|---|---|
| AuthenticatedURL | The  AuthenticatedURLclass enables the use of the JDKURLclass
 against HTTP endpoints protected with theAuthenticationFilter. | 
| AuthenticatedURL.Token | Client side authentication token. | 
| KerberosAuthenticator | The  KerberosAuthenticatorimplements the Kerberos SPNEGO authentication sequence. | 
| PseudoAuthenticator | The  PseudoAuthenticatorimplementation provides an authentication equivalent to Hadoop's
 Simple authentication, it trusts the value of the 'user.name' Java System property. | 
| Exception | Description | 
|---|---|
| AuthenticationException | Exception thrown when an authentication error occurs. | 
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