【Spring学习及总结23】事务属性(timeout，noRollbackFor，rollbackFor，timeout)

isolation：事务的隔离级别

propagation ：事务的传播行为

noRollbackFor—class[ ]：哪些异常事务可以不回滚

noRollbackForClassName–String[ ]

timeout：超时，事务超出指定执行时长后自动终止并回滚

readOnly : 设置事务未只读事务

rollbackFor—class[ ]：哪些异常事务需要回滚

rollbackForClassName—String[ ]

timeout：超时，事务超出指定执行时长后自动终止并回滚

@Service
public class BookService {
    @Autowired
    BookDao bookDao;
   
    @Transactional(timeout = 3)
    public void checkout(String username,String isbn){
        //减库存
        bookDao.updateStock(isbn);
        
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        
        //获取价格
        int price = bookDao.getPrice(isbn);
        //减价格
        bookDao.updateBalance(username,price);
    }
}

readOnly =false：默认为false

@Service
public class BookService {

    @Autowired
    BookDao bookDao;
    
    @Transactional(readOnly =false)
    public void checkout(String username,String isbn){
        //减库存
        bookDao.updateStock(isbn);
        //获取价格
        int price = bookDao.getPrice(isbn);
        //减价格
        bookDao.updateBalance(username,price);
    }
}

noRollbackFor–class[ ]：让原来回滚的异常不回滚

异常分类：
运行时异常：可以不处理，默认都回滚
编译器异常：必须处理，默认不回滚

@Service
public class BookService {

    @Autowired
    BookDao bookDao;

    @Transactional(noRollbackFor = {ArithmeticException.class})
    public void checkout(String username,String isbn){
        //减库存
        bookDao.updateStock(isbn);
        //获取价格
        int price = bookDao.getPrice(isbn);
        //减价格
        bookDao.updateBalance(username,price);

        //运行时异常，默认回滚
        int i=10/0;
    }
}

rollbackFor：让原来不回滚的异常回滚

@Service
public class BookService {

    @Autowired
    BookDao bookDao;

    @Transactional()
    public void checkout(String username,String isbn) throws FileNotFoundException {
        //减库存
        bookDao.updateStock(isbn);
        //获取价格
        int price = bookDao.getPrice(isbn);
        //减价格
        bookDao.updateBalance(username,price);
        //编译时异常，默认不回滚
        new FileInputStream("D://hdafkajd");
    }
}

设置rollbackFor属性,让原来不回滚的事务回滚。

@Service
public class BookService {

    @Autowired
    BookDao bookDao;

    @Transactional(rollbackFor = {FileNotFoundException.class})
    public void checkout(String username,String isbn) throws FileNotFoundException {
        //减库存
        bookDao.updateStock(isbn);
        //获取价格
        int price = bookDao.getPrice(isbn);
        //减价格
        bookDao.updateBalance(username,price);
        //编译时异常，默认不回滚
        new FileInputStream("D://hdafkajd");
    }
}