Question

当我尝试捕获DataIntegrityViolationException并将其转换为我的自定义异常时，不执行catch块。

作为一个例子，我使用了以下代码： guide

结果，ServicePointRepository抛出在我的控制器层处理的DataIntegrityViolationException，运行时的代码似乎避免了catch阻塞。

我做错了什么？

这是PersistenceService的代码：

@Autowired
private ServicePointRepository servicePointRepository;

@Autowired
private BusinessExceptionFactory businessExceptionFactory;

@Autowired
private TransactionTemplate transactionTemplate;

@Override
public String save(final ServicePointDTO servicePointDTO) {
    final ServicePointEntity servicePointEntity = mapToEntity(servicePointDTO);
    return transactionTemplate.execute(status -> {
        try {
            return servicePointRepository.save(servicePointEntity).getId().toString();
        } catch (DataIntegrityViolationException e) {
            throw businessExceptionFactory.createBusinessException(AlreadyExistException.class, CommonError.ALREADY_EXIST);
        }
    });
}

Answer 1

这是正确的方法：

    @Override
public String save(final ServicePointDTO servicePointDTO) {
    final ServicePointEntity servicePointEntity = mapToEntity(servicePointDTO);
    try {
        return transactionTemplate.execute(status -> servicePointRepository.save(servicePointEntity).getId().toString());
    } catch (DataIntegrityViolationException e) {
        throw businessExceptionFactory.createBusinessException(AlreadyExistException.class, CommonError.ALREADY_EXIST);
    }
}

此外，此方法不应标记为@Transactional

Answer 2

您需要定义一个PersistenceExceptionTranslationPostProcessor后处理器来代理您的存储库，并使用逻辑将专有异常转换为Spring DataAccessException层次结构。还要记住使用@Repository注释来标记存储库，以便检测和代理它们

@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslatorPostProcessor(){
   return new PersistenceExceptionTranslationPostProcessor();
}

或XML中的等价物

Spring TransactionTemplate不处理异常

2 个答案: