Sample Controller for Mock

public class RegistrationController {
  private MemberService memberService;
  private MailService mailService;

  public String processRegistration(HttpServletRequest req, HttpServletResponse res) {
    Member memberBaru = new MemberBaru();
    memberBaru.setUsername(req.getParameter("username");
    memberBaru.setPassword(memberService.generateRandomPassword());
    memberService.simpan(memberBaru);
    mailService.kirimNotifikasi(memberBaru);
  }
}