Spring 数据异常处理 [英] Spring Data Exception Handling

问题描述

我正在使用 Spring Data-JPA 进行一个项目.我需要处理 JpaRepository 方法调用中的一些异常.

I´m working on a project using Spring Data-JPA. I need to handle some exceptions in JpaRepository method calls.

在下面的代码中，我需要拦截主键违规错误，但我无法直接捕获异常.就我而言，当发生此类异常时，存储库层 (JpaRepository) 会抛出 UnexpectedRollbackException 异常.我需要在这个异常对象内部进行搜索，以确定问题的原因.

In the code bellow, I need to intercept primary key violations erros but I cannot catch the exception directly. In my case, when an exception of this kind occurs, the UnexpectedRollbackException exception is thrown by repository layer (JpaRepository). I need to search inside this exception object to determine what is the cause of the problem.

我想知道是否有更优雅"的方式来实现这一点.

I am wondering if there is a more "elegant" way to achieve this.

public Phone insert(Phone phone) throws BusinessException {
    Phone result = null;
    try{
        result = phoneRepository.save(phone);
    }
    catch(UnexpectedRollbackException ex){
        if((ex.getCause() != null && ex.getCause() instanceof RollbackException) &&
           (ex.getCause().getCause() != null && ex.getCause().getCause() instanceof PersistenceException) && 
           (ex.getCause().getCause().getCause() != null && ex.getCause().getCause().getCause() instanceof ConstraintViolationException)){
                throw new BusinessException("constraint violation", ex);
        }
    }
    catch(Exception ex){
        throw new OuvidorNegocioException("unknown error", ex);
    }       
    return result;
}

谢谢！

更新:

下面的代码似乎好多了.

The code bellow seems to be much better.

public Phone insert(Phone phone) throws BusinessException {
    Phone result = null;
    try{
        result = phoneRepository.save(phone);
    }
    catch(UnexpectedRollbackException ex){
        if(ex.getMostSpecificCause() instanceof SQLIntegrityConstraintViolationException){
                throw new BusinessException("constraint violation", ex);
        }
    }
    catch(Exception ex){
        throw new OuvidorNegocioException("unknown error", ex);
    }       
    return result;
}

推荐答案

无论您在哪里处理异常，您都可以选择查看 getMostSpecificCause() 或 getRootCause()UnexpectedRollbackException 的 code> 方法.这是有关这些方法的信息.

Wherever you handle the exception, you have the option of looking into the getMostSpecificCause() or getRootCause() methods of UnexpectedRollbackException. Here is information about those methods.

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