content: /*
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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
   *
   *     http://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.cloudapp.seata.demo.service.impl;
  
  import com.alibaba.cloudapp.seata.demo.entity.Order;
  import com.alibaba.cloudapp.seata.demo.entity.Stock;
  import com.alibaba.cloudapp.seata.demo.service.AccountService;
  import com.alibaba.cloudapp.seata.demo.service.BusinessService;
  import com.alibaba.cloudapp.seata.demo.service.OrderService;
  import com.alibaba.cloudapp.seata.demo.service.StockService;
  import io.seata.spring.annotation.GlobalTransactional;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import java.util.Random;
  
  @Service
  public class BusinessServiceImpl implements BusinessService {
      
      @Autowired
      private OrderService orderService;
      @Autowired
      private AccountService accountService;
      @Autowired
      private StockService stockService;
      
      private final Random random = new Random();
      
      @Override
      @GlobalTransactional
      public boolean buy(String userId, String productCode, int count) {
          Stock stock = stockService.debit(productCode, count);
          if (stock == null) {
              throw new RuntimeException("StockService failed.");
          }
          Order order = orderService.create(userId, productCode, count, stock.getPrice());
          if(order == null) {
              throw new RuntimeException("OrderService failed");
          }
          
          boolean prepare = accountService.debit(userId, order.getAmount());
          if (!prepare) {
              throw new RuntimeException("AccountService failed.");
          }
          
          if(random.nextBoolean()) {
              throw new RuntimeException("random exception!");
          }
          
          return true;
      }
  }
  