content: /*
   * Copyright 2013-2023 the original author or authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.cloud.integration.account.mapper;
  
  import java.sql.Timestamp;
  
  import org.apache.ibatis.annotations.Mapper;
  import org.apache.ibatis.annotations.Param;
  import org.apache.ibatis.annotations.Select;
  import org.apache.ibatis.annotations.Update;
  
  import org.springframework.stereotype.Repository;
  
  /**
   * @author TrevorLink
   */
  @Mapper
  @Repository
  public interface AccountMapper {
  
  	@Select("SELECT money FROM account WHERE user_id = #{userId}")
  	Integer getBalance(@Param("userId") String userId);
  
  	@Update("UPDATE account SET money = money - #{price},update_time = #{updateTime} WHERE user_id = #{userId} AND money >= ${price}")
  	int reduceBalance(@Param("userId") String userId, @Param("price") Integer price,
  			@Param("updateTime") Timestamp updateTime);
  
  }
  