Exemplo de controller do vraptor usando vraptor-authentication.

gistfile1.java

@Resource
public class AuthenticationController {

  private AuthenticationControl authenticationControl;

  public AuthenticationController(AuthenticationControl authenticationControl) {
    this.authenticationControl = authenticationControl;
  }

  @Login
  @Get("/login")
  public void login() {
  }

  @Post("/signin")
  public void signin(final User user) {
    //validate the user information
    authenticationControl.createSession(user);
  }

  @Get("/signout")
  public void signout() {
    authenticationControl.destroySession();
  }

}