Spring事务的传播Propagation

 

事务传播方式：

1.REQUIRES_NEW

/***
     * @description 方法加事务  REQUIRES_NEW ，内部方法也加事务 REQUIRES_NEW 以哪个事务为准
     * @methodName testTrancNew 
     * @date 2020/9/10 20:02
     * @param
     * @return void
     * @throws
     */
    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRES_NEW)
    @Override
    public void testTrancNew() {

        /**
         * begin tran A
         * begin tran B
         * cityDataService.trancNewARequires_new() 事务传播方式 REQUIRES_NEW 不受外部方法的影响，内部买没有异常就提交成功
         * commit B
         * insert()
         * trancNewBThrowException()
         * rollback A
         */
        //不会回滚
        cityDataService.trancNewARequires_new();

        Mycity city = new Mycity();
        city.setCountry("外部方法 REQUIRES_NEW");
        city.setName("中国A");

        mycityMapper.insert(city);
        //抛异常
        cityDataService.trancNewBThrowException();
 
    }
//cityDataService:
    @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRES_NEW)
    @Override
    public void trancNewARequires_new() {
        City city = new City();
        city.setCountry("内部方法 REQUIRES_NEW");
        city.setName("中国A");
        cityMapper.insert(city);
    }


 @Override
    public void trancNewBThrowException() {
        City city = new City();
        city.setCountry("methodA");
        city.setName("中国A");
        int a = 4;
        int cc = a / 0;
        cityMapper.insert(city);
    }

REQUIRES_NEW

REQUIRES_NEW