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.storage.service.impl;
  
  import java.sql.Timestamp;
  
  import com.alibaba.cloud.integration.common.BusinessException;
  import com.alibaba.cloud.integration.common.Result;
  import com.alibaba.cloud.integration.storage.mapper.StorageMapper;
  import com.alibaba.cloud.integration.storage.service.StorageService;
  import io.seata.core.context.RootContext;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  import org.springframework.transaction.annotation.Transactional;
  
  /**
   * @author TrevorLink
   */
  @Service
  public class StorageServiceImpl implements StorageService {
  
  	private Logger logger = LoggerFactory.getLogger(getClass());
  
  	@Autowired
  	private StorageMapper storageMapper;
  
  	@Override
  	@Transactional
  	public void reduceStock(String commodityCode, Integer count)
  			throws BusinessException {
  		logger.info("[reduceStock] current XID: {}", RootContext.getXID());
  
  		checkStock(commodityCode, count);
  
  		Timestamp updateTime = new Timestamp(System.currentTimeMillis());
  		int updateCount = storageMapper.reduceStock(commodityCode, count, updateTime);
  		if (updateCount == 0) {
  			throw new BusinessException("deduct stock failed");
  		}
  	}
  
  	@Override
  	public Result<?> getRemainCount(String commodityCode) {
  		Integer stock = storageMapper.getStock(commodityCode);
  		if (stock == null) {
  			return Result.failed("commodityCode wrong,please check commodity code");
  		}
  		return Result.success(stock);
  	}
  
  	private void checkStock(String commodityCode, Integer count)
  			throws BusinessException {
  		Integer stock = storageMapper.getStock(commodityCode);
  		if (stock < count) {
  			throw new BusinessException("no enough stock");
  		}
  	}
  
  }
  