Question

public Long upsertCreditRiskInformation(@Valid CreditRiskInformationCodeTermBasedRequest request, Boolean codeBased)
            throws IOException {
      `CreditRisk creditRisk =` creditRiskDataRepository.findByOrganisationId(organisation.getId());

        if (creditRisk == null) {

            if (codeBased) {

                creditRisk =
                        new CreditRisk(null, creditRiskData, null, getExternalQueryDate(creditRiskData), organisation);
            } else {
                creditRisk =
                        new CreditRisk(creditRiskData, null, getExternalQueryDate(creditRiskData), null, organisation);
            }

        } else {// modify

            creditRisk.modifyCreditRisk(creditRisk, request.getCreditRiskData(), getExternalQueryDate(creditRiskData),
                    codeBased);
        }

        return creditRiskDataRepository.save(creditRisk).getId();
    }
}

这是同时从2个地方调用的方法。

一个发送给codebased=true，另一个发送给false。因此，如果是新创建的，则两者都可以尝试创建新的。

我该如何预防？

我使用了@Transactional(isolation = Isolation.READ_COMMITTED)

方法的顶部。但是这次，错误是：

    ould not execute statement; SQL [n/a]; constraint [UK_jvmwr3y956lfnbk4fhh859cof]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement (Duplicate entry '13' for key 'UK_jvmwr3y956lfnbk4fhh859cof')
org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [UK_jvmwr3y956lfnbk4fhh859cof]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement

我不明白错误在哪里。它表示最后一行repository.save

因为我之前做过null check，所以lock并没有阻止它。因为null检查在锁定之前都显示为null。

我该怎么办？

尝试保存同一行时乐观锁定失败的异常

0 个答案: