EJB，持续期间出现异常："EntityManager must be access within a transaction"

Question

我收到此错误："EntityManager must be access within a transaction" 这对我来说很奇怪，因为我的 bean 是带有注释的标记：

@Stateless(name = "UserControllerSession")

我是这样注入 EntityManager 的：

@PersistenceContext(unitName = "app")
    private EntityManager em;

这是我的方法：

 @Override
    @PermitAll
    public String updateBlockedAndDeactivationReasonForIds(String userPk, String iban, List<String> associatedIds) {
        UserLocal user = em.find(UserLocal.class, Long.valueOf(userPk));
        if (user == null) {
            return ("User with id: " + userPk + " does not exist ! \n");
        }

        user.setBlocked(true);
        user.setActive(false);
        user.setDeactivationReason(DeactivationReason.DEACTIVATION_MULTIPLY_IBAN_REASON);
        user.setDeactivationDate(new Date());

        StringBuilder message = new StringBuilder();
        message.append(" IBAN " + iban + " is linked to multiple accounts: ");
        for (String id : associatedIds) {
            message.append(id + " ");
        }

        ContactJournalEntryBean cjb = new ContactJournalEntryBean("USER", user.getLogin(), new Date(), "Internet",
                message.toString());
        em.persist(user);
        em.persist(cjb);

        return "SUCCESS operation for user with id: " + userPk;
    }

据我所知，EJB 方法的默认值是 Transactioanl.REQUIRED，因此默认情况下应该创建事务。另一个问题是我可以在一次交易中保留 2 个吗？感谢您的帮助

Answer 1

我认为默认的 REQUIRED 仅在您实际使用 @TransactionAttribute 注释时才适用。尝试将它添加到您的方法中（或者 class 如果您希望它作为所有方法的默认值）。

EJB，持续期间出现异常："EntityManager must be access within a transaction"

EJB, exception during persist: "EntityManager must be access within a transaction"

java

ejb

transactions