Spring 事务失效的情况

原创

syrdbt 2023-12-31 13:04:13 博主文章分类：----Spring ©著作权

文章标签 回滚 ide 方法调用 文章分类 JavaScript 前端开发

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1. 数据库引擎不支持事务

以 MySQL 为例，MyISAM存储引擎不支持事务, InnoDB 引擎支持事务。

2. 异常被catch

执行以下测试方法，数据成功插入，调用 test 方法没有回滚。

@Override
    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
    public void test(CustomerDO customerDO) {
        mapper.insert(customerDO);
        try {
            int i = 1 / 0;
        } catch (Exception e) {
            log.info("", e);
        }
    }

3. 异常抛出类型错误

异常抛出类型错误，事务回滚的默认级别是 RuntimeException，抛出的异常必须是 RuntimeException 或它的子类。

抛出的异常是 RuntimeException 时，调用 test 方法回滚成功：

@Override
    @Transactional(propagation = Propagation.REQUIRED)
    public void test(CustomerDO customerDO) throws Exception {
        mapper.insert(customerDO);
        throw new RuntimeException("234334334");
    }

抛出的异常是 Exception 时，是RuntimeException的父类，不被识别，调用 test 方法回滚失败：

@Override
    @Transactional(propagation = Propagation.REQUIRED)
    public void test(CustomerDO customerDO) throws Exception {
        mapper.insert(customerDO);
        throw new Exception("234334334");
    }

解决办法，指定回滚的异常 rollbackFor = Exception.class，调用 test 方法回滚成功：

@Override
    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
    public void test(CustomerDO customerDO) throws Exception {
        mapper.insert(customerDO);
        throw new Exception("234334334");
    }

4. 本类方法调用

本类方法调用，会用 this 关键字，没有经过Spring的代理类去调用此方法。

如下使用this关键字，调用 test 方法回滚失败：

@Override
    public void test(CustomerDO customerDO) throws Exception {
        test1(customerDO);
    }
    
    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
    public void test1(CustomerDO customerDO) throws Exception {
        mapper.insert(customerDO);
        int i = 1 / 0;
    }

如下调用 test 方法回滚成功，REQUIRES_NEW 失效：

@Override
    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
    public void test(CustomerDO customerDO) throws Exception {
        test1(customerDO);
        int i = 1 / 0;
    }

    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRES_NEW)
    public void test1(CustomerDO customerDO) throws Exception {
        mapper.insert(customerDO);
    }