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.examples;
  
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.SQLException;
  import java.util.Random;
  
  import io.seata.core.context.RootContext;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.springframework.http.HttpEntity;
  import org.springframework.http.HttpHeaders;
  import org.springframework.http.MediaType;
  import org.springframework.http.ResponseEntity;
  import org.springframework.jdbc.core.JdbcTemplate;
  import org.springframework.jdbc.core.PreparedStatementCreator;
  import org.springframework.jdbc.support.GeneratedKeyHolder;
  import org.springframework.jdbc.support.KeyHolder;
  import org.springframework.util.LinkedMultiValueMap;
  import org.springframework.util.MultiValueMap;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RestController;
  import org.springframework.web.client.RestTemplate;
  
  /**
   * @author xiaojing
   */
  @RestController
  public class OrderController {
  
  	private static final Logger LOGGER = LoggerFactory.getLogger(OrderController.class);
  
  	private static final String SUCCESS = "SUCCESS";
  
  	private static final String FAIL = "FAIL";
  
  	private static final String USER_ID = "U100001";
  
  	private static final String COMMODITY_CODE = "C00321";
  
  	private final JdbcTemplate jdbcTemplate;
  
  	private final RestTemplate restTemplate;
  
  	private Random random;
  
  	public OrderController(JdbcTemplate jdbcTemplate, RestTemplate restTemplate) {
  		this.jdbcTemplate = jdbcTemplate;
  		this.restTemplate = restTemplate;
  		this.random = new Random();
  	}
  
  	@PostMapping(value = "/order", produces = "application/json")
  	public String order(String userId, String commodityCode, int orderCount) {
  		LOGGER.info("Order Service Begin ... xid: " + RootContext.getXID());
  
  		int orderMoney = calculate(commodityCode, orderCount);
  
  		invokerAccountService(orderMoney);
  
  		final Order order = new Order();
  		order.userId = userId;
  		order.commodityCode = commodityCode;
  		order.count = orderCount;
  		order.money = orderMoney;
  
  		KeyHolder keyHolder = new GeneratedKeyHolder();
  
  		int result = jdbcTemplate.update(new PreparedStatementCreator() {
  
  			@Override
  			public PreparedStatement createPreparedStatement(Connection con)
  					throws SQLException {
  				PreparedStatement pst = con.prepareStatement(
  						"insert into order_tbl (user_id, commodity_code, count, money) values (?, ?, ?, ?)",
  						PreparedStatement.RETURN_GENERATED_KEYS);
  				pst.setObject(1, order.userId);
  				pst.setObject(2, order.commodityCode);
  				pst.setObject(3, order.count);
  				pst.setObject(4, order.money);
  				return pst;
  			}
  		}, keyHolder);
  
  		order.id = keyHolder.getKey().longValue();
  
  		if (random.nextBoolean()) {
  			throw new RuntimeException("this is a mock Exception");
  		}
  
  		LOGGER.info("Order Service End ... Created " + order);
  
  		if (result == 1) {
  			return SUCCESS;
  		}
  		return FAIL;
  	}
  
  	private int calculate(String commodityId, int orderCount) {
  		return 2 * orderCount;
  	}
  
  	private void invokerAccountService(int orderMoney) {
  		String url = "http://127.0.0.1:18084/account";
  		HttpHeaders headers = new HttpHeaders();
  		headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
  
  		MultiValueMap<String, String> map = new LinkedMultiValueMap<String, String>();
  
  		map.add("userId", USER_ID);
  		map.add("money", orderMoney + "");
  
  		HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<MultiValueMap<String, String>>(
  				map, headers);
  
  		ResponseEntity<String> response = restTemplate.postForEntity(url, request,
  				String.class);
  	}
  
  }
  