springboot集成分布式事务Seata

痛定思痛。 2022-02-19 01:31 256阅读 0赞

# 简介 #

## github地址 ##

spring-boot-starter-seata：[https://github.com/itrickzhang/spring-boot-starter-seata][https_github.com_itrickzhang_spring-boot-starter-seata]

## seata版本 ##

server和client版本为0.4.1，Seata 一直在快速迭代在1.0 之前都有可能出现协议不兼容 尽量使用版本号一致

## 说明 ##

目前提供的示例是针对使用dubbo的服务，那Spring Boot的项目如何集成fescar呢？

# 快速开始 #

--------------------

## 使用案例 ##

Business Service购买商品的业务逻辑。整个业务逻辑由3个微服务驱动:

*  Storage service: 扣除给定商品的库存量.
 *  Order service: 根据采购需求创建订单.
 *  Account service: 借记用户帐户上的余额.

## 请求逻辑 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nY2hhbmdiaW4xMjM_size_16_color_FFFFFF_t_70]

## fescar下载 ##

下载地址:[https://github.com/alibaba/fescar/releases][https_github.com_alibaba_fescar_releases]

## 脚本 ##

### 业务脚本 ###

DROP TABLE IF EXISTS `storage_tbl`;
    CREATE TABLE `storage_tbl` (
      `id` int(11) NOT NULL AUTO_INCREMENT,
      `commodity_code` varchar(255) DEFAULT NULL,
      `count` int(11) DEFAULT 0,
      PRIMARY KEY (`id`),
      UNIQUE KEY (`commodity_code`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
    
    DROP TABLE IF EXISTS `order_tbl`;
    CREATE TABLE `order_tbl` (
      `id` int(11) NOT NULL AUTO_INCREMENT,
      `user_id` varchar(255) DEFAULT NULL,
      `commodity_code` varchar(255) DEFAULT NULL,
      `count` int(11) DEFAULT 0,
      `money` int(11) DEFAULT 0,
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
    
    DROP TABLE IF EXISTS `account_tbl`;
    CREATE TABLE `account_tbl` (
      `id` int(11) NOT NULL AUTO_INCREMENT,
      `user_id` varchar(255) DEFAULT NULL,
      `money` int(11) DEFAULT 0,
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

### 事务脚本 ###

-- 注意此处0.3.0+ 增加唯一索引 ux_undo_log
    CREATE TABLE `undo_log` (
      `id` bigint(20) NOT NULL AUTO_INCREMENT,
      `branch_id` bigint(20) NOT NULL,
      `xid` varchar(100) NOT NULL,
      `rollback_info` longblob NOT NULL,
      `log_status` int(11) NOT NULL,
      `log_created` datetime NOT NULL,
      `log_modified` datetime NOT NULL,
      `ext` varchar(100) DEFAULT NULL,
      PRIMARY KEY (`id`),
      UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

## 集成 ##

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-seata</artifactId>
        <version>${project.version}</version>
    </dependency>

## 使用 ##

使用注解@GlobalTransactional

@GlobalTransactional(timeoutMills = 300000, name = "spring-cloud-demo-tx")
        @RequestMapping(value = "/fescar/feign", method = RequestMethod.GET, produces = "application/json")
        public String feign() {
            LOGGER.info("business Service Begin ... xid: " + RootContext.getXID());
            String result = storageService.storage(COMMODITY_CODE, ORDER_COUNT);
            if (!SUCCESS.equals(result)) {
                throw new RuntimeException();
            }
            result = orderService.order(USER_ID, COMMODITY_CODE, ORDER_COUNT);
            if (!SUCCESS.equals(result)) {
                throw new RuntimeException();
            }
            return SUCCESS;
        }

## demo运行 ##

[spring-boot-starter-seata-sample][]

*  Start AccountService
 *  Start StorageService
 *  Start OrderService
 *  Run BusinessService for demo test

## 运行结果 ##

启动demo  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nY2hhbmdiaW4xMjM_size_16_color_FFFFFF_t_70 1]  
访问demo  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nY2hhbmdiaW4xMjM_size_16_color_FFFFFF_t_70 2]  
数据库数据  
![在这里插入图片描述][20190415132103600.png]  
![在这里插入图片描述][20190415132117668.png]

[https_github.com_itrickzhang_spring-boot-starter-seata]: https://github.com/itrickzhang/spring-boot-starter-seata
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nY2hhbmdiaW4xMjM_size_16_color_FFFFFF_t_70]: /images/20220219/f0215888e5684b80ab7dc73036ad9a02.png
[https_github.com_alibaba_fescar_releases]: https://github.com/alibaba/fescar/releases
[spring-boot-starter-seata-sample]: https://github.com/itrickzhang/spring-boot-starter-seata/tree/master/spring-boot-starter-seata-sample
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nY2hhbmdiaW4xMjM_size_16_color_FFFFFF_t_70 1]: /images/20220219/5a39b46df80a4625b2816a067724edcf.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nY2hhbmdiaW4xMjM_size_16_color_FFFFFF_t_70 2]: /images/20220219/4ee661ac7a7c4388b58eaa01726e5bd6.png
[20190415132103600.png]: /images/20220219/2125f0366cec41f39c3dc42184a00e8f.png
[20190415132117668.png]: /images/20220219/85f636d4afe244f98af5ce54cbc5c944.png