AuthenticationProvider (Alluxio Core - Common Utilities 295 API)

All Known Implementing Classes:

CustomAuthenticationProvider, SimpleAuthenticationProvider
```
public interface AuthenticationProvider
```
Abstraction for an authentication provider at SASL server for AuthType.SIMPLE and AuthType.CUSTOM.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class AuthenticationProvider.Factory
Factory for AuthenticationProvider.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`authenticate(java.lang.String user, java.lang.String password)`	The authenticate method is called by the `PlainSaslServerCallbackHandler` in the `PlainSaslServer` layer to authenticate users for their requests.

- Method Detail
  - authenticate
```
void authenticate(java.lang.String user,
                  java.lang.String password)
           throws javax.security.sasl.AuthenticationException
```
    The authenticate method is called by the PlainSaslServerCallbackHandler in the PlainSaslServer layer to authenticate users for their requests. If a user is to be granted, return nothing/throw nothing. When a user is to be disallowed, throw an appropriate AuthenticationException.
    
    Parameters:
    
    user - The username received over the connection request
    
    password - The password received over the connection request
    
    Throws:
    
    javax.security.sasl.AuthenticationException - when a user is found to be invalid by the implementation