@Transactional(readOnly = false)
    public Users getUserByLoginId(String email){
        return userDAO.getUserByLoginId(email);
    }

=========
becomes:
========
    @Transactional(readOnly = false)
    public Result getUserByLoginId(String email){
    Result result =  new Result();
    Users user = userDAO.getUserByLoginId(email)
    if(user != null){
        result.setStatus(true)} //success
        result.setStatusMessage("you win")
        result.setReturnObjectOfMethod(user);
    }else{
        result.setStuts(false) // fail
        result.setStatusMessage("you loose")
    }

        return result;
    }


//controller evaluates the Result and checks / uses all values accordingly