SpringCloud整合Seata

业务场景：
用户下单，整个业务逻辑由两个微服务构成：

• 订单服务：根据采购需求创建订单。
• 库存服务：对给定的商品扣除库存数量

1 pom.xml依赖引入

     <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba.nacos</groupId>
                    <artifactId>nacos-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
            <version>1.4.1</version>
        </dependency>

2 bootstrap.yml

logging:
  level:
    com:
      beiyou: debug
    root: error
server:
  port: 3888
spring:
  application:
    name: order-app
  cloud:
    alibaba:
    nacos:
      discovery:
        server-addr: 192.168.11.99:8848
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      initial-size: 10
      max-active: 100
      max-wait: 60000
      min-idle: 10
      password: root123
      url: jdbc:mysql://192.168.11.37:3306/mall?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&allowMultiQueries=true
      username: root
    type: com.alibaba.druid.pool.DruidDataSource


seata:
  enabled: true
  enable-auto-data-source-proxy: true
  tx-service-group: mygroup # 事务分组名称，要和服务端对应
  config:
    type: nacos
    nacos:
      server-addr: 192.168.11.99:8848
      group: DEFAULT_GROUP
      namespace: public
      username: nacos
      password: nacos
      data-id: seataServer.properties
  registry:
    type: nacos
    nacos:
      server-addr: 192.168.11.99:8848
      application: seata-server
      namespace: public
      username: nacos
      password: nacos
      cluster: default
      group: DEFAULT_GROUP
  service:
    vgroup-mapping:
      mygroup: default # key是事务分组名称 value要和服务端的保持一致
    disable-global-transaction: false
  client:
    rm:
      report-success-enable: false

3 启动服务

我们自己的服务要与seata-server服务在同一个namespace下，查看服务是否启动成功。

4 使用

4.1 准备数据表
beimao_stock库存库添加如下表

CREATE TABLE `inventory` (
  `id` int NOT NULL AUTO_INCREMENT COMMENT '唯一id',
  `productId` int NOT NULL COMMENT '商品Id',
  `qty` int DEFAULT '0' COMMENT '库存数量',
  PRIMARY KEY (`id`)
) 

beimao_order添加以下表

CREATE TABLE `order_master` (
  `id` bigint NOT NULL COMMENT '订单id',
  `name` varchar(100) DEFAULT NULL COMMENT '用户名',
  `phone` varchar(11) DEFAULT NULL COMMENT '手机号',
  PRIMARY KEY (`id`)
) 
CREATE TABLE `order_item` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '唯一id',
  `orderId` bigint NOT NULL COMMENT '订单id',
  `productName` varchar(100) DEFAULT NULL COMMENT '商品名称',
  `productId` int DEFAULT NULL COMMENT '商品id',
  `qty` int DEFAULT NULL COMMENT '购买数量',
  PRIMARY KEY (`id`)
) 

4.2 在外层接口上增加@GlobalTransactional注解即可

  @GlobalTransactional(name="createOrder")
    public String ordering(){
        orderDao.insert();
        storageService.deduct(2);
        return "ok";
    }