## 1.新建我的项目dbinit用于初始化数据库
## 2.搭建eureka注册核心
## 3.新建共工依赖的maven工程：order-parent
## 4.别离创立account、storage、order。账户、库存和订单模块
## 5.复制全局惟一发号器工程到工作目录下：

批改yml配置：增加根本配置和注册

它有两个算法：一个雪花算法，一个数据库算法，咱们这里用数据库算法

将原有的db1.properties复制一份改为seata_order.properties，并批改其中配置


启动测试
http://localhost:9090/segment/ids/next_id?businessType=order_business

## 6.order 近程调用发号器、库存、账户

yml 配置ribbon，敞开重试，减少超时工夫

启动类增加 @EnableFeignClients申明式客户端接口
  • EasyIdClient
  • AccountClient
  • StorageClient

AccountClient
package cn.tedu.order.feign;import org.springframework.cloud.openfeign.FeignClient;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestParam;import java.math.BigDecimal;@FeignClient(name="account")public interface AccountClient {    @GetMapping("/decrease")    String decrease(@RequestParam("userId") Long userId,                    @RequestParam("money") BigDecimal money);}
StorageClient
package cn.tedu.order.feign;import org.springframework.cloud.openfeign.FeignClient;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestParam;@FeignClient(name="storage")public interface StorageClient {    //缩小商品库存 @GetMapping("/decrease")    String decrease(@RequestParam("productId") Long productId,                    @RequestParam("count") Integer count);}
EasyIdClient
package cn.tedu.order.feign;import org.springframework.cloud.openfeign.FeignClient;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestParam;@FeignClient(name="easy-id-generator")public interface EasyIdClient {    @GetMapping("segment/ids/next_id")    String nextId(@RequestParam("businessType") String businessType);}

OrderServiceImpl 应用接口调用近程服务

package cn.tedu.order.service;import cn.tedu.order.entity.Order;import cn.tedu.order.feign.AccountClient;import cn.tedu.order.feign.EasyIdClient;import cn.tedu.order.feign.StorageClient;import cn.tedu.order.mapper.OrderMapper;import cn.tedu.order.mapper.OrderMapper;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.util.Random;@Servicepublic class OrderServiceImpl implements OrderService {    @Autowired private OrderMapper orderMapper;    @Autowired private EasyIdClient easyIdClient;    @Autowired private AccountClient accountClient;    @Autowired private StorageClient storageClient;    @Override public void create(Order order) {        // TODO: 从全局惟一id发号器取得id，这里临时随机产生一个 orderId //Long orderId = Long.valueOf(new Random().nextInt(Integer.MAX_VALUE)); //获取一个随机id   order_bussiness是哪里定义的呢？？？？？？？？？？？？？ String s = easyIdClient.nextId("order_business");        //将String型的s装换为Long类型 Long orderId = Long.valueOf(s);        order.setId(orderId);        orderMapper.create(order);        // TODO: 调用storage，批改库存 storageClient.decrease(order.getProductId(),order.getCount());        // TODO: 调用account，批改账户余额 accountClient.decrease(order.getUserId(),order.getMoney());        //调用完了，拜访，怎么拜访呢？必定是通过订单拜访，那同过订单又怎么拜访呢 //http://localhost:8083/create?userId=1&productId=1&count=10&money=100 }}
启动测试

http://localhost:8083/create?userId=1&productId=1&count=10&money=100

控制台会有日志输入