org.apache.hadoop.security.authentication.client
Class PseudoAuthenticator

java.lang.Object
  org.apache.hadoop.security.authentication.client.PseudoAuthenticator

All Implemented Interfaces:

Authenticator

public class PseudoAuthenticator
extends Object
implements Authenticator

The PseudoAuthenticator implementation provides an authentication equivalent to Hadoop's Simple authentication, it trusts the value of the 'user.name' Java System property.

The 'user.name' value is propagated using an additional query string parameter USER_NAME ('user.name').

Field Summary

static String

USER_NAME Name of the additional parameter that carries the 'user.name' value.

Constructor Summary

PseudoAuthenticator()

Method Summary

void	authenticate(URL url, AuthenticatedURL.Token token) Performs simple authentication against the specified URL.
protected String	getUserName() Returns the current user name.

Methods inherited from class java.lang.Object

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

Field Detail

USER_NAME

public static final String USER_NAME

Name of the additional parameter that carries the 'user.name' value.

See Also:

Constant Field Values

Constructor Detail

PseudoAuthenticator

public PseudoAuthenticator()

Method Detail

authenticate

public void authenticate(URL url,
                         AuthenticatedURL.Token token)
                  throws IOException,
                         AuthenticationException

Performs simple authentication against the specified URL.

If a token is given it does a NOP and returns the given token.

If no token is given, it will perform an HTTP OPTIONS request injecting an additional parameter USER_NAME in the query string with the value returned by the getUserName() method.

If the response is successful it will update the authentication token.

Specified by:

authenticate in interface Authenticator

Parameters:

url - the URl to authenticate against.

token - the authencation token being used for the user.

Throws:

IOException - if an IO error occurred.

AuthenticationException - if an authentication error occurred.

getUserName

protected String getUserName()

Returns the current user name.

This implementation returns the value of the Java system property 'user.name'

Returns:

the current user name.