Spring事务中的事务传播行为使用方式详解

@Service
@Transactional
public class UserServiceImpl implements UserService{
    @Autowired
    private UserDao userDao;
    @Override
    public void updateUser(User user) {
        // 具体业务逻辑
    }
    @Override
    @Transactional(propagation = Propagation.REQUIRED)
    public void transferMoney(int fromUserId, int toUserId, double amount) {
        User fromUser = userDao.getUserById(fromUserId);
        User toUser = userDao.getUserById(toUserId);
        double fromUserBalance = fromUser.getBalance();
        if(fromUserBalance < amount){
            throw new RuntimeException("余额不足");
        }
        fromUser.setBalance(fromUserBalance - amount);
        toUser.setBalance(toUser.getBalance() + amount);
        userDao.updateUser(fromUser);
        userDao.updateUser(toUser);
    }
}

@Service
@Transactional
public class OrderServiceImpl implements OrderService{
    @Autowired
    private OrderDao orderDao;
    @Override
    public void createOrder(Order order) {
        // 具体业务逻辑
    }
    @Override
    @Transactional(propagation = Propagation.REQUIRES_NEW)
    public void updateOrderStatus(int orderId, int status) {
        Order order = orderDao.getOrderById(orderId);
        order.setStatus(status);
        orderDao.updateOrder(order);
    }
}

@Service
@Transactional
public class LogServiceImpl implements LogService{
    @Autowired
    private LogDao logDao;
    @Override
    public void addLog(Log log) {
        // 具体业务逻辑
    }
    @Override
    @Transactional(propagation = Propagation.SUPPORTS)
    public void deleteLog(int logId) {
        logDao.deleteLog(logId);
    }
}

@Service
@Transactional
public class ProductService{
    @Autowired
    private ProductDao productDao;
    @Transactional(propagation = Propagation.NOT_SUPPORTED)
    public void updateProductStock(int productId, int quantity){
        // 具体业务逻辑
    }
}

@Service
@Transactional
public class OrderServiceImpl implements OrderService{
    @Autowired
    private OrderDao orderDao;
    @Override
    public void createOrder(Order order) {
        // 具体业务逻辑
    }
    @Override
    @Transactional(propagation = Propagation.NEVER)
    public void deleteOrder(int orderId) {
        Order order = orderDao.getOrderById(orderId);
        orderDao.deleteOrder(order);
    }
}