This is the default implementation of an SSOIdentityManager.
This implementation keeps track of user and session associations in memory.
author: Sebastian Gonzalez Oyuela version: $Id: SSOIdentityManagerImpl.java 508 2008-02-18 13:32:29Z sgonzalez $
Finds a user based on its name.
Parameters: name - the user login name, wich is unique for a domain. throws: NoSuchUserException - if the user does not exist for the domain.
Finds the user associated to a sso session
Parameters: sessionId - the sso session identifier throws: SSOIdentityException - if no user is associated to this session id.