Question

为了避免死锁，我想逐行更新一个 id 列表。为了在春季回滚数据，我使用了注释事务。但是当我测试事务时，当更新sql抛出异常时，它并没有从之前更新的记录中回滚数据。这是我的代码：

@Service
public class YahooBudgetUpdateService {
    @Autowired
    private AccounttUpdateMapper mapper; 
    
    public void accountUpdate() throws Exception {
       List<String> ids = new ArrayList<String>();
       ids.add("1"); 
       ids.add("2"); 
       ids.add("3"); 
       updateAcnt(ids);
    }

    @Transactional 
    public void updateAcnt(List<String> ids) throw Exception {
        for(int i=0; i<ids.size; i++){
            updateById(ids.get(i));  
        }    
    }
}

Mapper.java：

public interface AccountUpdateMapper {
     int updateById(String id);
}

映射器.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 
"http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="src.mapper.AccountUpdateMapper">
<update id="updateById">
    UPDATE ad_cpnt
    SET
        updatedOn = now(),
        lst_updtd_dt= now(),
    where
        id = #{id}
</update>
</mapper>

我尝试使用 @Transactional(rollbackFor= {Exception.class}) 但它也不起作用。有人知道原因吗？

Answer 1

这里是所有可以工作的东西

Service
public class YahooBudgetUpdateService {
    @Autowired
    private AccounttUpdateMapper mapper; 
    
    @Transactional  <-----This belongs here as it will not work with internal calls as explained in comments
    public void accountUpdate() throws Exception {
       List<String> ids = new ArrayList<String>();
       ids.add("1"); 
       ids.add("2"); 
       ids.add("3"); 
       updateAcnt(ids);
    }

    public void updateAcnt(List<String> ids) throw Exception {
        for(int i=0; i<ids.size; i++){
            mapper.updateById(ids.get(i));  <-----here you must invoke it from mapper instance not another internal call
        }    
    }
}

注释@Transactional 在春天不起作用

1 个答案: