ssh声明式事物为什么不能绑定

我配置spring声明式事物为*Server
我的登陆方法为login没有在事物的范围呢，但里面的getUserInfo在事物范围内，
那么只有get*的话就没有被绑定到线程中，只有配置login才行。为什么？

PROPAGATION_REQUIRED,-java.lang.Throwable


PROPAGATION_REQUIRED,-java.lang.Throwable


PROPAGATION_REQUIRED,-java.lang.Throwable


PROPAGATION_REQUIRED,-java.lang.Throwable


PROPAGATION_REQUIRED,-java.lang.Throwable


PROPAGATION_REQUIRED,-java.lang.Throwable,readOnly


PROPAGATION_REQUIRED,-java.lang.Throwable,readOnly


PROPAGATION_REQUIRED,-java.lang.Throwable

        public Map<String,Object> login(String userName,String passWord) throws ServiceException {
    Map<String,Object> infoMap = new HashMap<String, Object>();
    Boolean isOk = false;//是否登陆成功
    try {
        BaseUser user = getUserInfo(userName);
        passWord = Md5.md5(passWord);
        isOk = isPasswdOk(user,passWord);
        infoMap.put("isOk",isOk);//是否登陆成功
        if(isOk){
            infoMap.put("BaseUser",user);
        }
    } catch (DaoException e) {
        infoMap.put("isOk",isOk);
        throw new ServiceException("登录service error",e.getCause());
    }
    return infoMap;
}


     public BaseUser getUserInfo(String userName) throws DaoException {
    return userDao.getUserInfoByName(userName);
}

http://ask.csdn.net/questions/11511