双12分布式事务购买

class OrderService:
    def create_order(self, order_info):
        try:
            # 创建订单
            order_id = self._create_order_in_db(order_info)
            # 扣减库存
            self._deduct_inventory(order_info['product_id'], order_info['quantity'])
            # 扣款
            self._charge_customer(order_info['customer_id'], order_info['amount'])
            return order_id
        except Exception as e:
            # 补偿操作
            self._compensate_order(order_id)
            raise e

    def _create_order_in_db(self, order_info):
        # 数据库操作
        pass

    def _deduct_inventory(self, product_id, quantity):
        # 库存操作
        pass

    def _charge_customer(self, customer_id, amount):
        # 支付操作
        pass

    def _compensate_order(self, order_id):
        # 补偿订单操作
        pass