@Stateless
public class ScheduledEJB{

	@EJB
	private UserManagerLocal userManager;
	
	//Dummy code
	@Schedule(dayOfMonth="1",month="1")
	public executeScheduled(){
		User demoUser = userManager.getUser(1L);
		demoUser.setActive(false);
		//User impersonification code, here I still need to recover the password stored in plaintext, in order to login successfully
		Query q = entityManager.createNativeQuery("SELECT password FROM credentials WHERE userID = :ID");
		q.setParameter("ID",1L);
		String password = (String)q.getSingleResult();
		String userName = demoUser.getUserName();
		LoginContext loginContext = new LoginContext("client-login", new UsernamePasswordHandler(userName, password));
		try{
			loginContext.login();
			userManager.updateUser(demoUser);
		}
		finally{
			loginContext.logout();
		}
		
	}
}