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.service.impl;
  
  import java.sql.Timestamp;
  
  import com.alibaba.cloud.integration.account.mapper.AccountMapper;
  import com.alibaba.cloud.integration.account.service.AccountService;
  import com.alibaba.cloud.integration.common.BusinessException;
  import com.alibaba.cloud.integration.common.Result;
  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 AccountServiceImpl implements AccountService {
  
  	private Logger logger = LoggerFactory.getLogger(getClass());
  
  	@Autowired
  	private AccountMapper accountMapper;
  
  	@Override
  	@Transactional
  	public void reduceBalance(String userId, Integer price) throws BusinessException {
  		logger.info("[reduceBalance] currenet XID: {}", RootContext.getXID());
  
  		checkBalance(userId, price);
  
  		Timestamp updateTime = new Timestamp(System.currentTimeMillis());
  		int updateCount = accountMapper.reduceBalance(userId, price, updateTime);
  		if (updateCount == 0) {
  			throw new BusinessException("reduce balance failed");
  		}
  	}
  
  	@Override
  	public Result<?> getRemainAccount(String userId) {
  		Integer balance = accountMapper.getBalance(userId);
  		if (balance == null) {
  			return Result.failed("wrong userId,please check the userId");
  		}
  		return Result.success(balance);
  	}
  
  	private void checkBalance(String userId, Integer price) throws BusinessException {
  		Integer balance = accountMapper.getBalance(userId);
  		if (balance < price) {
  			throw new BusinessException("no enough balance");
  		}
  	}
  
  }
  