@Controller
public class LoginController {
    private static final Logger log = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private AuthenticationManager authenticationManager;

    public LoginController() {
        log.debug("I am");
    }

    @ResponseBody
    @RequestMapping(value = "/login", method = RequestMethod.PUT)
    public User login(@RequestBody User user) {
        log.debug("Incomming login {}, {}", user.getUsername(), user.getPassword());
        UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(user.getUsername(),
                user.getPassword());
        Authentication auth = authenticationManager.authenticate(token);
        token.setDetails(user);
        SecurityContextHolder.getContext().setAuthentication(auth);
        return user;
    }

    @ResponseBody
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public User whoami() {
        final SecurityContext context = SecurityContextHolder.getContext();
        final Authentication auth = context.getAuthentication();
        log.debug("isAuthenticated: {}, name: {}", new Object[] { auth.isAuthenticated(), auth.getName() });
        for (final GrantedAuthority role : auth.getAuthorities()) {
            log.debug("Role: {}", role);
        }
        User user = new User();
        user.setUsername(auth.getName());
        user.setCreated(Calendar.getInstance());
        return user;
    }
}