org.apache.reef.runtime.common.client.defaults

Class DefaultUserCredentials

java.lang.Object

org.apache.reef.runtime.common.client.defaults.DefaultUserCredentials

All Implemented Interfaces:

UserCredentials

public final class DefaultUserCredentials
extends Object
implements UserCredentials

A holder object for REEF user credentials.

Method Summary

Methods

Modifier and Type	Method and Description
<T> T	doAs(PrivilegedExceptionAction<T> action) Execute the privileged action as a given user.
boolean	isSet() Check if the user credentials had been set.
void	set(String name, UserCredentials other) Copy credentials from another existing user.

Methods inherited from class java.lang.Object

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

Method Detail

set

public void set(String name,
       UserCredentials other)
         throws IOException

Copy credentials from another existing user. This method can be called only once per instance. This default implementation should never be called.

Specified by:

set in interface UserCredentials

Parameters:

name - Name of the new user.

other - Credentials of another user.

Throws:

RuntimeException - always throws.

IOException - if unable to copy.

isSet

public boolean isSet()

Check if the user credentials had been set. Always returns false.

Specified by:

isSet in interface UserCredentials

Returns:

always false.

doAs

public <T> T doAs(PrivilegedExceptionAction<T> action)
       throws Exception

Execute the privileged action as a given user. This implementation always executes the action outside the user context, simply by calling action.run().

Specified by:

doAs in interface UserCredentials

Type Parameters:

T - action return type.

Parameters:

action - an action to run.

Returns:

result of an action.

Throws:

Exception - whatever the action can throw.