Spring TransactionTemplate不处理异常

Question

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

正如我使用的代码从一个这样的示例： guide

结果，ServicePointRepository抛出DataIntegrityViolationException是在我的控制器层处理，并且在运行时代码似乎是避免catch块。

我在做什么错？

这是PersistenceService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，这种方法不应该被标记为@Transactional

Answer 2

您需要定义PersistenceExceptionTranslationPostProcessor后处理器用逻辑代理您的存储库，将专有异常转换为Spring DataAccessException hie rachy。还记得与@Repository注解来标记库对它们进行检测和代理

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

或等值的XML