SpringCloud Hoxton版 + SpringCloud alibaba学习笔记（14）-- SpringCloud Alibaba Seata处理分布式事务

本是古典何须时尚 2023-01-04 10:30 241阅读 0赞

## 上一篇：[SpringCloud Hoxton版 + SpringCloud alibaba学习笔记（11）-- SpringCloud Alibaba Sentinel实现熔断与限流][SpringCloud Hoxton_ _ SpringCloud alibaba_11_-- SpringCloud Alibaba Sentinel] ##

### 一、分布式事务问题 ###

#### 1、分布式前 ####

单机单库没这个问题，从1：1 -> 1:N -> N: N

#### 2、分布式之后 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 1]

#### 3、一句话 ####

一次业务操作需要跨多个数据源或需要跨多个系统进行远程调用，就会产生分布式事务问题

### 二、Seata简介 ###

#### 1、是什么 ####

Seata是一款开源的分布式事务解决方案，致力于在微服务架构下提供高性能和简单易用的分布式事务服务  
官网地址：[http://seata.io/zh-cn/][http_seata.io_zh-cn]

#### 2、能干嘛 ####

一个典型的分布式事务过程：  
分布式事务处理过程的-ID+三组件模型  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 2]  
处理过程：  
![在这里插入图片描述][2021010918330619.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 3]

#### 3、去哪下 ####

发布说明:[https://github.com/seata/seata/releases][https_github.com_seata_seata_releases]

#### 4、怎么玩 ####

Spring 本地@Transactional  
全局@GlobalTransactional  
SEATA的分布式交易解决方案  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 4]

### 三、Seata-Server安装 ###

#### 1、官网地址 ####

[http://seata.io/zh-cn/][http_seata.io_zh-cn]

#### 2、下载版本 ####

#### 3、seata-server-0.9.0.zip解压到指定目录并修改conf目录下的file.conf配置文件 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 5]  
service模块

vgroup_mapping.my_test_tx_group = "fsp_tx_group"

store模块

mode = "db"
    
    url = "jdbc:mysql://127.0.0.1:3306/seata"
    user = "root"
    password = "你自己的密码"

#### 4、mysql5.7数据库新建库seata ####

#### 5、在seata库里建表 ####

建表db\_store.sql在\\seata-server-0.9.0\\seata\\conf目录里面：db\_store.sql  
SQL：

-- the table to store GlobalSession data
    drop table if exists `global_table`;
    create table `global_table` (
      `xid` varchar(128)  not null,
      `transaction_id` bigint,
      `status` tinyint not null,
      `application_id` varchar(32),
      `transaction_service_group` varchar(32),
      `transaction_name` varchar(128),
      `timeout` int,
      `begin_time` bigint,
      `application_data` varchar(2000),
      `gmt_create` datetime,
      `gmt_modified` datetime,
      primary key (`xid`),
      key `idx_gmt_modified_status` (`gmt_modified`, `status`),
      key `idx_transaction_id` (`transaction_id`)
    );
     
    -- the table to store BranchSession data
    drop table if exists `branch_table`;
    create table `branch_table` (
      `branch_id` bigint not null,
      `xid` varchar(128) not null,
      `transaction_id` bigint ,
      `resource_group_id` varchar(32),
      `resource_id` varchar(256) ,
      `lock_key` varchar(128) ,
      `branch_type` varchar(8) ,
      `status` tinyint,
      `client_id` varchar(64),
      `application_data` varchar(2000),
      `gmt_create` datetime,
      `gmt_modified` datetime,
      primary key (`branch_id`),
      key `idx_xid` (`xid`)
    );
     
    -- the table to store lock data
    drop table if exists `lock_table`;
    create table `lock_table` (
      `row_key` varchar(128) not null,
      `xid` varchar(96),
      `transaction_id` long ,
      `branch_id` long,
      `resource_id` varchar(256) ,
      `table_name` varchar(32) ,
      `pk` varchar(36) ,
      `gmt_create` datetime ,
      `gmt_modified` datetime,
      primary key(`row_key`)
    );

#### 6、修改seata-server-0.9.0\\seata\\conf目录下的registry.conf配置文件 ####

registry { 
      # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
      type = "nacos"
     
      nacos { 
        serverAddr = "localhost:8848"
        namespace = ""
        cluster = "default"
      }
    目的是：指明注册中心为nacos，及修改nacos连接信息

#### 7、先启动Nacos端口号8848 ####

#### 8、再启动seata-server ####

softs\\seata-server-0.9.0\\seata\\bin， seata-server.bat

### 四、订单/库存/账户业务数据库准备 ###

#### 1、以下演示都需要先启动Nacos后启动Seata，保证两个都OK ####

Seata没启动报错no available server to connect

#### 2、分布式事务业务说明 ####

业务说明  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 6]  
下订单–>扣库存–>减账户（余额）

#### 3、创建业务数据库 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 7]  
建表SQL

CREATE DATABASE seata_order；
     
    CREATE DATABASE seata_storage；
     
    CREATE DATABASE seata_account；

#### 4、按照上述3库分别建对应业务表 ####

##### ①、seata\_order库下建t\_order表 #####

CREATE TABLE t_order(
        `id` BIGINT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
        `user_id` BIGINT(11) DEFAULT NULL COMMENT '用户id',
        `product_id` BIGINT(11) DEFAULT NULL COMMENT '产品id',
        `count` INT(11) DEFAULT NULL COMMENT '数量',
        `money` DECIMAL(11,0) DEFAULT NULL COMMENT '金额',
        `status` INT(1) DEFAULT NULL COMMENT '订单状态：0：创建中; 1：已完结'
    ) ENGINE=INNODB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
     
    SELECT * FROM t_order;

##### ②、seata\_storage库下建t\_storage表 #####

CREATE TABLE t_storage(
        `id` BIGINT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
        `product_id` BIGINT(11) DEFAULT NULL COMMENT '产品id',
       `'total` INT(11) DEFAULT NULL COMMENT '总库存', `used` INT(11) DEFAULT NULL COMMENT '已用库存', `residue` INT(11) DEFAULT NULL COMMENT '剩余库存' ) ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; INSERT INTO seata_storage.t_storage(`id`,`product_id`,`total`,`used`,`residue`) VALUES('1','1','100','0','100');
     
    SELECT * FROM t_storage;

##### ③、seata\_account库下建t\_account表 #####

CREATE TABLE t_account(
        `id` BIGINT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT 'id',
        `user_id` BIGINT(11) DEFAULT NULL COMMENT '用户id',
        `total` DECIMAL(10,0) DEFAULT NULL COMMENT '总额度',
        `used` DECIMAL(10,0) DEFAULT NULL COMMENT '已用余额',
        `residue` DECIMAL(10,0) DEFAULT '0' COMMENT '剩余可用额度'
    ) ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
     
    INSERT INTO seata_account.t_account(`id`,`user_id`,`total`,`used`,`residue`) VALUES('1','1','1000','0','1000')
     
    SELECT * FROM t_account;

#### 5、按照上述3库分别建对应的回滚日志表 ####

订单-库存-账户3个库下都需要建各自的回滚日志表  
\\seata-server-0.9.0\\seata\\conf目录下的db\_undo\_log.sql  
建表SQL

drop table `undo_log`;
    CREATE TABLE `undo_log` (
      `id` bigint(20) NOT NULL AUTO_INCREMENT,
      `branch_id` bigint(20) NOT NULL,
      `xid` varchar(100) NOT NULL,
      `context` varchar(128) 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;

#### 6、最终效果 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 8]

### 五、订单/库存/账户业务微服务准备 ###

#### 1、业务需求 ####

下订单->减库存->扣余额->改（订单）状态

#### 2、新建订单Order-Module ####

##### ①、seata-order-service2001 #####

##### ②、POM #####

<dependencies>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
                <exclusions>
                    <exclusion>
                        <artifactId>seata-all</artifactId>
                        <groupId>io.seata</groupId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>io.seata</groupId>
                <artifactId>seata-all</artifactId>
                <version>0.9.0</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.37</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>1.1.10</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>2.0.0</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
        </dependencies>

##### ③、YML #####

server:
      port: 2001
     
    spring:
      application:
        name: seata-order-service
      cloud:
        alibaba:
          seata:
            #自定义事务组名称需要与seata-server中的对应
            tx-service-group: fsp_tx_group
        nacos:
          discovery:
            server-addr: localhost:8848
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/seata_order
        username: root
        password: 1111111
     
    feign:
      hystrix:
        enabled: false
     
    logging:
      level:
        io:
          seata: info
     
    mybatis:
      mapperLocations: classpath:mapper/*.xml

##### ④、file.conf #####

transport { 
      # tcp udt unix-domain-socket
      type = "TCP"
      #NIO NATIVE
      server = "NIO"
      #enable heartbeat
      heartbeat = true
      #thread factory for netty
      thread-factory { 
        boss-thread-prefix = "NettyBoss"
        worker-thread-prefix = "NettyServerNIOWorker"
        server-executor-thread-prefix = "NettyServerBizHandler"
        share-boss-worker = false
        client-selector-thread-prefix = "NettyClientSelector"
        client-selector-thread-size = 1
        client-worker-thread-prefix = "NettyClientWorkerThread"
        # netty boss thread size,will not be used for UDT
        boss-thread-size = 1
        #auto default pin or 8
        worker-thread-size = 8
      }
      shutdown { 
        # when destroy server, wait seconds
        wait = 3
      }
      serialization = "seata"
      compressor = "none"
    }
     
    service { 
     
      vgroup_mapping.fsp_tx_group = "default" 
     
      default.grouplist = "127.0.0.1:8091"
      enableDegrade = false
      disable = false
      max.commit.retry.timeout = "-1"
      max.rollback.retry.timeout = "-1"
      disableGlobalTransaction = false
    }
      
    client { 
      async.commit.buffer.limit = 10000
      lock { 
        retry.internal = 10
        retry.times = 30
      }
      report.retry.count = 5
      tm.commit.retry.count = 1
      tm.rollback.retry.count = 1
    }
     
    ## transaction log store
    store { 
      ## store mode: file、db
      mode = "db"
     
      ## file store
      file { 
        dir = "sessionStore"
     
        # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
        max-branch-session-size = 16384
        # globe session size , if exceeded throws exceptions
        max-global-session-size = 512
        # file buffer size , if exceeded allocate new buffer
        file-write-buffer-cache-size = 16384
        # when recover batch read size
        session.reload.read_size = 100
        # async, sync
        flush-disk-mode = async
      }
     
      ## database store
      db { 
        ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
        datasource = "dbcp"
        ## mysql/oracle/h2/oceanbase etc.
        db-type = "mysql"
        driver-class-name = "com.mysql.jdbc.Driver"
        url = "jdbc:mysql://127.0.0.1:3306/seata"
        user = "root"
        password = "123456"
        min-conn = 1
        max-conn = 3
        global.table = "global_table"
        branch.table = "branch_table"
        lock-table = "lock_table"
        query-limit = 100
      }
    }
    lock { 
      ## the lock store mode: local、remote
      mode = "remote"
     
      local { 
        ## store locks in user's database
      }
     
      remote { 
        ## store locks in the seata's server
      }
    }
    recovery { 
      #schedule committing retry period in milliseconds
      committing-retry-period = 1000
      #schedule asyn committing retry period in milliseconds
      asyn-committing-retry-period = 1000
      #schedule rollbacking retry period in milliseconds
      rollbacking-retry-period = 1000
      #schedule timeout retry period in milliseconds
      timeout-retry-period = 1000
    }
     
    transaction { 
      undo.data.validation = true
      undo.log.serialization = "jackson"
      undo.log.save.days = 7
      #schedule delete expired undo_log in milliseconds
      undo.log.delete.period = 86400000
      undo.log.table = "undo_log"
    }
     
    ## metrics settings
    metrics { 
      enabled = false
      registry-type = "compact"
      # multi exporters use comma divided
      exporter-list = "prometheus"
      exporter-prometheus-port = 9898
    }
     
    support { 
      ## spring
      spring { 
        # auto proxy the DataSource bean
        datasource.autoproxy = false
      }
    }

##### ⑤、registry.conf #####

registry { 
      # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
      type = "nacos"
     
      nacos { 
        serverAddr = "localhost:8848"
        namespace = ""
        cluster = "default"
      }
      eureka { 
        serviceUrl = "http://localhost:8761/eureka"
        application = "default"
        weight = "1"
      }
      redis { 
        serverAddr = "localhost:6379"
        db = "0"
      }
      zk { 
        cluster = "default"
        serverAddr = "127.0.0.1:2181"
        session.timeout = 6000
        connect.timeout = 2000
      }
      consul { 
        cluster = "default"
        serverAddr = "127.0.0.1:8500"
      }
      etcd3 { 
        cluster = "default"
        serverAddr = "http://localhost:2379"
      }
      sofa { 
        serverAddr = "127.0.0.1:9603"
        application = "default"
        region = "DEFAULT_ZONE"
        datacenter = "DefaultDataCenter"
        cluster = "default"
        group = "SEATA_GROUP"
        addressWaitTime = "3000"
      }
      file { 
        name = "file.conf"
      }
    }
     
    config { 
      # file、nacos 、apollo、zk、consul、etcd3
      type = "file"
     
      nacos { 
        serverAddr = "localhost"
        namespace = ""
      }
      consul { 
        serverAddr = "127.0.0.1:8500"
      }
      apollo { 
        app.id = "seata-server"
        apollo.meta = "http://192.168.1.204:8801"
      }
      zk { 
        serverAddr = "127.0.0.1:2181"
        session.timeout = 6000
        connect.timeout = 2000
      }
      etcd3 { 
        serverAddr = "http://localhost:2379"
      }
      file { 
        name = "file.conf"
      }
    }

##### ⑥、domain #####

CommonResult

package com.atguigu.springcloud.alibaba.domain;
     
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
     
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class CommonResult<T>
    { 
        private Integer code;
        private String  message;
        private T       data;
     
        public CommonResult(Integer code, String message)
        { 
            this(code,message,null);
        }
    }

Order

package com.atguigu.springcloud.alibaba.domain;
     
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
     
    import java.math.BigDecimal;
     
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Order
    { 
        private Long id;
     
        private Long userId;
     
        private Long productId;
     
        private Integer count;
     
        private BigDecimal money;
     
        private Integer status; //订单状态：0：创建中；1：已完结
    }

##### ⑦、Dao接口及实现 #####

OrderDao

package com.atguigu.springcloud.alibaba.dao;
     
    import com.atguigu.springcloud.alibaba.domain.Order;
    import org.apache.ibatis.annotations.Mapper;
    import org.apache.ibatis.annotations.Param;
     
    @Mapper
    public interface OrderDao
    { 
        //新建订单
        void create(Order order);
     
        //修改订单状态，从零改为1
        void update(@Param("userId") Long userId,@Param("status") Integer status);
    }

resources文件夹下新建mapper文件夹后添加OrderMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
     
    <mapper namespace="com.atguigu.springcloud.alibaba.dao.OrderDao">
     
        <resultMap id="BaseResultMap" type="com.atguigu.springcloud.alibaba.domain.Order">
            <id column="id" property="id" jdbcType="BIGINT"/>
            <result column="user_id" property="userId" jdbcType="BIGINT"/>
            <result column="product_id" property="productId" jdbcType="BIGINT"/>
            <result column="count" property="count" jdbcType="INTEGER"/>
            <result column="money" property="money" jdbcType="DECIMAL"/>
            <result column="status" property="status" jdbcType="INTEGER"/>
        </resultMap>
     
        <insert id="create">
            insert into t_order (id,user_id,product_id,count,money,status)
            values (null,#{userId},#{productId},#{count},#{money},0);
        </insert>
     
     
        <update id="update">
            update t_order set status = 1
            where user_id=#{userId} and status = #{status};
        </update>
     
    </mapper>

##### ⑧、Service接口及实现 #####

OrderService

package com.atguigu.springcloud.alibaba.service;
     
    import com.atguigu.springcloud.alibaba.domain.Order;
     
    public interface OrderService{ 
        void create(Order order);
    }

OrderServiceImpl

package com.atguigu.springcloud.alibaba.service.impl;
     
    import com.atguigu.springcloud.alibaba.dao.OrderDao;
    import com.atguigu.springcloud.alibaba.domain.Order;
    import com.atguigu.springcloud.alibaba.service.AccountService;
    import com.atguigu.springcloud.alibaba.service.OrderService;
    import com.atguigu.springcloud.alibaba.service.StorageService;
    import io.seata.spring.annotation.GlobalTransactional;
    import lombok.extern.slf4j.Sl f4j;
    import org.springframework.stereotype.Service;
     
    import javax.annotation.Resource;
     
     
    @Service
    @Slf4j
    public class OrderServiceImpl implements OrderService
    { 
        @Resource
        private OrderDao orderDao;
        @Resource
        private StorageService storageService;
        @Resource
        private AccountService accountService;
     
        /** * 创建订单->调用库存服务扣减库存->调用账户服务扣减账户余额->修改订单状态 */
         
        @Override
        @GlobalTransactional(name = "fsp-create-order",rollbackFor = Exception.class)
        public void create(Order order){ 
            log.info("----->开始新建订单");
            //新建订单
            orderDao.create(order);
     
            //扣减库存
            log.info("----->订单微服务开始调用库存，做扣减Count");
            storageService.decrease(order.getProductId(),order.getCount());
            log.info("----->订单微服务开始调用库存，做扣减end");
     
            //扣减账户
            log.info("----->订单微服务开始调用账户，做扣减Money");
            accountService.decrease(order.getUserId(),order.getMoney());
            log.info("----->订单微服务开始调用账户，做扣减end");
     
             
            //修改订单状态，从零到1代表已经完成
            log.info("----->修改订单状态开始");
            orderDao.update(order.getUserId(),0);
            log.info("----->修改订单状态结束");
     
            log.info("----->下订单结束了");
     
        }
    }

StorageService

package com.atguigu.springcloud.alibaba.service;
     
    import com.atguigu.springcloud.alibaba.domain.CommonResult;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestParam;
     
    import java.math.BigDecimal;
     
    @FeignClient(value = "seata-storage-service")
    public interface StorageService{ 
        @PostMapping(value = "/storage/decrease")
        CommonResult decrease(@RequestParam("productId") Long productId, @RequestParam("count") Integer count);
    }

AccountService

package com.atguigu.springcloud.alibaba.service;
     
    import com.atguigu.springcloud.alibaba.domain.CommonResult;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestParam;
     
    import java.math.BigDecimal;
     
    @FeignClient(value = "seata-account-service")
    public interface AccountService{ 
        @PostMapping(value = "/account/decrease")
        CommonResult decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money);
    }

##### ⑨、Controller #####

package com.atguigu.springcloud.alibaba.controller;
     
    import com.atguigu.springcloud.alibaba.domain.CommonResult;
    import com.atguigu.springcloud.alibaba.domain.Order;
    import com.atguigu.springcloud.alibaba.service.OrderService;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
     
    import javax.annotation.Resource;
      
    @RestController
    public class OrderController{ 
        @Resource
        private OrderService orderService;
     
     
        @GetMapping("/order/create")
        public CommonResult create(Order order)
        { 
            orderService.create(order);
            return new CommonResult(200,"订单创建成功");
        }
    }

##### ⑩、Config配置 #####

MyBatisConfig

package com.atguigu.springcloud.alibaba.config;
     
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.context.annotation.Configuration;
     
     
    @Configuration
    @MapperScan({ "com.atguigu.springcloud.alibaba.dao"})
    public class MyBatisConfig { 
     
    }

DataSourceProxyConfig

package com.atguigu.springcloud.alibaba.config;
     
    import com.alibaba.druid.pool.DruidDataSource;
    import io.seata.rm.datasource.DataSourceProxy;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.mybatis.spring.SqlSessionFactoryBean;
    import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
    import javax.sql.DataSource;
     
    @Configuration
    public class DataSourceProxyConfig {  
        @Value("${mybatis.mapperLocations}")
        private String mapperLocations;
         
        @Bean
        @ConfigurationProperties(prefix = "spring.datasource")
        public DataSource druidDataSource(){ 
            return new DruidDataSource();
        } 
        
        @Bean
        public DataSourceProxy dataSourceProxy(DataSource dataSource) { 
            return new DataSourceProxy(dataSource);
        }
     
        
        @Bean
        public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception { 
            SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
            sqlSessionFactoryBean.setDataSource(dataSourceProxy);
            sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(mapperLocations));
            sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
            return sqlSessionFactoryBean.getObject();
        }
     
    }

##### ⑪、主启动 #####

package com.atguigu.springcloud.alibaba;
     
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
     
    @EnableDiscoveryClient
    @EnableFeignClients
    @SpringBootApplication(exclude = DataSourceAutoConfiguration.class)//取消数据源自动创建的配置
    public class SeataOrderMainApp2001{ 
     
        public static void main(String[] args)
        { 
            SpringApplication.run(SeataOrderMainApp2001.class, args);
        }
    }

#### 3、新建库存Storage-Module ####

##### ①、seata-order-service2002 #####

##### ②、POM #####

<dependencies>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
                <exclusions>
                    <exclusion>
                        <artifactId>seata-all</artifactId>
                        <groupId>io.seata</groupId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>io.seata</groupId>
                <artifactId>seata-all</artifactId>
                <version>0.9.0</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>2.0.0</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.37</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>1.1.10</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
        </dependencies>

##### ③、YML #####

server:
      port: 2002
     
    spring:
      application:
        name: seata-storage-service
      cloud:
        alibaba:
          seata:
            tx-service-group: fsp_tx_group
        nacos:
          discovery:
            server-addr: localhost:8848
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/seata_storage
        username: root
        password: 111111
     
    logging:
      level:
        io:
          seata: info
     
    mybatis:
      mapperLocations: classpath:mapper/*.xml

##### ④、file.conf #####

##### ⑤、registry.conf #####

registry { 
      # file 、nacos 、eureka、redis、zk
      type = "nacos"
     
      nacos { 
        serverAddr = "localhost:8848"
        namespace = ""
        cluster = "default"
      }
      eureka { 
        serviceUrl = "http://localhost:8761/eureka"
        application = "default"
        weight = "1"
      }
      redis { 
        serverAddr = "localhost:6381"
        db = "0"
      }
      zk { 
        cluster = "default"
        serverAddr = "127.0.0.1:2181"
        session.timeout = 6000
        connect.timeout = 2000
      }
      file { 
        name = "file.conf"
      }
    }
     
    config { 
      # file、nacos 、apollo、zk
      type = "file"
     
      nacos { 
        serverAddr = "localhost"
        namespace = ""
        cluster = "default"
      }
      apollo { 
        app.id = "fescar-server"
        apollo.meta = "http://192.168.1.204:8801"
      }
      zk { 
        serverAddr = "127.0.0.1:2181"
        session.timeout = 6000
        connect.timeout = 2000
      }
      file { 
        name = "file.conf"
      }
    }

##### ⑥、domain #####

CommonResult

Storage

package com.atguigu.springcloud.alibaba.domain;
     
    import lombok.Data;
     
    @Data
    public class Storage { 
     
        private Long id;
     
        // 产品id
        private Long productId;
     
        //总库存
        private Integer total;
     
     
        //已用库存
        private Integer used;
     
      
        //剩余库存
        private Integer residue;
    }

##### ⑦、Dao接口及实现 #####

StorageDao

package com.atguigu.springcloud.alibaba.dao;
     
    import org.apache.ibatis.annotations.Mapper;
    import org.apache.ibatis.annotations.Param;
     
    @Mapper
    public interface StorageDao { 
     
     
        //扣减库存信息
        void decrease(@Param("productId") Long productId, @Param("count") Integer count);
    }

resources文件夹下新建mapper文件夹后添加StorageMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
     
    <mapper namespace="com.atguigu.springcloud.alibaba.dao.StorageDao">
     
        <resultMap id="BaseResultMap" type="com.atguigu.springcloud.alibaba.domain.Storage">
            <id column="id" property="id" jdbcType="BIGINT"/>
            <result column="product_id" property="productId" jdbcType="BIGINT"/>
            <result column="total" property="total" jdbcType="INTEGER"/>
            <result column="used" property="used" jdbcType="INTEGER"/>
            <result column="residue" property="residue" jdbcType="INTEGER"/>
        </resultMap>
     
        <update id="decrease">
            UPDATE
                t_storage
            SET
                used = used + #{count},residue = residue - #{count}
            WHERE
                product_id = #{productId}
        </update>
     
    </mapper>

##### ⑧、Service接口及实现 #####

StorageService

package com.atguigu.springcloud.alibaba.service;
     
    public interface StorageService { 
        
         // 扣减库存
        void decrease(Long productId, Integer count);
    }

StorageServiceImpl

package com.atguigu.springcloud.alibaba.service.impl;
     
    import com.atguigu.springcloud.alibaba.dao.StorageDao;
    import com.atguigu.springcloud.alibaba.service.StorageService ;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
     
    import javax.annotation.Resource;
     
    @Service
    public class StorageServiceImpl implements StorageService { 
     
        private static final Logger LOGGER = LoggerFactory.getLogger(StorageServiceImpl.class);
     
        @Resource
        private StorageDao storageDao;
     
         // 扣减库存
        @Override
        public void decrease(Long productId, Integer count) { 
            LOGGER.info("------->storage-service中扣减库存开始");
            storageDao.decrease(productId,count);
            LOGGER.info("------->storage-service中扣减库存结束");
        }
    }

##### ⑨、Controller #####

package com.atguigu.springcloud.alibaba.controller;
     
    import com.atguigu.springcloud.alibaba.domain.CommonResult ;
    import com.atguigu.springcloud.alibaba.service.StorageService ;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
     
    @RestController
    public class StorageController { 
     
        @Autowired
        private StorageService storageService;
     
        //扣减库存
        @RequestMapping("/storage/decrease")
        public CommonResult decrease(Long productId, Integer count) { 
            storageService.decrease(productId, count);
            return new CommonResult(200,"扣减库存成功！");
        }
    }

##### ⑩、Config配置 #####

MyBatisConfig

package com.atguigu.springcloud.alibaba.config;
     
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.context.annotation.Configuration;
     
    @Configuration
    @MapperScan({ "com.atguigu.springcloud.alibaba.dao"})
    public class MyBatisConfig { 
    }

DataSourceProxyConfig

package com.atguigu.springcloud.alibaba.config;
     
    import com.alibaba.druid.pool.DruidDataSource;
    import io.seata.rm.datasource.DataSourceProxy;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.mybatis.spring.SqlSessionFactoryBean;
    import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
     
    import javax.sql.DataSource;
     
     
    @Configuration
    public class DataSourceProxyConfig { 
     
        @Value("${mybatis.mapperLocations}")
        private String mapperLocations;
     
        @Bean
        @ConfigurationProperties(prefix = "spring.datasource")
        public DataSource druidDataSource(){ 
            return new DruidDataSource();
        }
     
        @Bean
        public DataSourceProxy dataSourceProxy(DataSource dataSource) { 
            return new DataSourceProxy(dataSource);
        }
     
        @Bean
        public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception { 
            SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
            sqlSessionFactoryBean.setDataSource(dataSourceProxy);
            sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(mapperLocations));
            sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
            return sqlSessionFactoryBean.getObject();
        }
     
    }

##### ⑪、主启动 #####

package com.atguigu.springcloud.alibaba;
     
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
     
    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.List;
    import java.util.concurrent.ForkJoinWorkerThread;
     
     
    @SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
    @EnableDiscoveryClient
    @EnableFeignClients
    public class SeataStorageServiceApplication2002
    { 
        public static void main(String[] args)
        { 
            SpringApplication.run(SeataStorageServiceApplication2002.class, args);
        }
    }

#### 4、新建账户Account-Module ####

##### ①、seata-order-service2003 #####

##### ②、POM #####

<dependencies>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
                <exclusions>
                    <exclusion>
                        <artifactId>seata-all</artifactId>
                        <groupId>io.seata</groupId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>io.seata</groupId>
                <artifactId>seata-all</artifactId>
                <version>0.9.0</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>2.0.0</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.37</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>1.1.10</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
        </dependencies>

##### ③、YML #####

server:
      port: 2003
     
    spring:
      application:
        name: seata-account-service
      cloud:
        alibaba:
          seata:
            tx-service-group: fsp_tx_group
        nacos:
          discovery:
            server-addr: localhost:8848
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/seata_account
        username: root
        password: 1111111
     
    feign:
      hystrix:
        enabled: false
     
    logging:
      level:
        io:
          seata: info
     
    mybatis:
      mapperLocations: classpath:mapper/*.xml

##### ④、file.conf #####

transport { 
      # tcp udt unix-domain-socket
      type = "TCP"
      #NIO NATIVE
      server = "NIO"
      #enable heartbeat
      heartbeat = true
      #thread factory for netty
      thread-factory { 
        boss-thread-prefix = "NettyBoss"
        worker-thread-prefix = "NettyServerNIOWorker"
        server-executor-thread-prefix = "NettyServerBizHandler"
        share-boss-worker = false
        client-selector-thread-prefix = "NettyClientSelector"
        client-selector-thread-size = 1
        client-worker-thread-prefix = "NettyClientWorkerThread"
        # netty boss thread size,will not be used for UDT
        boss-thread-size = 1
        #auto default pin or 8
        worker-thread-size = 8
      }
      shutdown { 
        # when destroy server, wait seconds
        wait = 3
      }
      serialization = "seata"
      compressor = "none"
    }
     
    service { 
     
      vgroup_mapping.fsp_tx_group = "default" #修改自定义事务组名称
     
      default.grouplist = "127.0.0.1:8091"
      enableDegrade = false
      disable = false
      max.commit.retry.timeout = "-1"
      max.rollback.retry.timeout = "-1"
      disableGlobalTransaction = false
    }
     
     
    client { 
      async.commit.buffer.limit = 10000
      lock { 
        retry.internal = 10
        retry.times = 30
      }
      report.retry.count = 5
      tm.commit.retry.count = 1
      tm.rollback.retry.count = 1
    }
     
    ## transaction log store
    store { 
      ## store mode: file、db
      mode = "db"
     
      ## file store
      file { 
        dir = "sessionStore"
     
        # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
        max-branch-session-size = 16384
        # globe session size , if exceeded throws exceptions
        max-global-session-size = 512
        # file buffer size , if exceeded allocate new buffer
        file-write-buffer-cache-size = 16384
        # when recover batch read size
        session.reload.read_size = 100
        # async, sync
        flush-disk-mode = async
      }
     
      ## database store
      db { 
        ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
        datasource = "dbcp"
        ## mysql/oracle/h2/oceanbase etc.
        db-type = "mysql"
        driver-class-name = "com.mysql.jdbc.Driver"
        url = "jdbc:mysql://127.0.0.1:3306/seata"
        user = "root"
        password = "123456"
        min-conn = 1
        max-conn = 3
        global.table = "global_table"
        branch.table = "branch_table"
        lock-table = "lock_table"
        query-limit = 100
      }
    }
    lock { 
      ## the lock store mode: local、remote
      mode = "remote"
     
      local { 
        ## store locks in user's database
      }
     
      remote { 
        ## store locks in the seata's server
      }
    }
    recovery { 
      #schedule committing retry period in milliseconds
      committing-retry-period = 1000
      #schedule asyn committing retry period in milliseconds
      asyn-committing-retry-period = 1000
      #schedule rollbacking retry period in milliseconds
      rollbacking-retry-period = 1000
      #schedule timeout retry period in milliseconds
      timeout-retry-period = 1000
    }
     
    transaction { 
      undo.data.validation = true
      undo.log.serialization = "jackson"
      undo.log.save.days = 7
      #schedule delete expired undo_log in milliseconds
      undo.log.delete.period = 86400000
      undo.log.table = "undo_log"
    }
     
    ## metrics settings
    metrics { 
      enabled = false
      registry-type = "compact"
      # multi exporters use comma divided
      exporter-list = "prometheus"
      exporter-prometheus-port = 9898
    }
     
    support { 
      ## spring
      spring { 
        # auto proxy the DataSource bean
        datasource.autoproxy = false
      }
    }

##### ⑤、registry.conf #####

##### ⑥、domain #####

CommonResult

Account

package com.atguigu.springcloud.alibaba.domain;
     
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
     
    import java.math.BigDecimal;
     
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Account { 
     
        private Long id;
     
        /** * 用户id */
        private Long userId;
     
        /** * 总额度 */
        private BigDecimal total;
     
        /** * 已用额度 */
        private BigDecimal used;
     
        /** * 剩余额度 */
        private BigDecimal residue;
    }

##### ⑦、Dao接口及实现 #####

AccountDao

package com.atguigu.springcloud.alibaba.dao;
     
    import org.apache.ibatis.annotations.Mapper;
    import org.apache.ibatis.annotations.Param;
    import org.springframework.stereotype.Component;
    import org.springframework.stereotype.Repository;
     
    import java.math.BigDecimal;
     
    @Mapper
    public interface AccountDao { 
     
        /** * 扣减账户余额 */
        void decrease(@Param("userId") Long userId, @Param("money") BigDecimal money);
    }

resources文件夹下新建mapper文件夹后添加AccountMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
     
    <mapper namespace="com.atguigu.springcloud.alibaba.dao.AccountDao">
     
        <resultMap id="BaseResultMap" type="com.atguigu.springcloud.alibaba.domain.Account">
            <id column="id" property="id" jdbcType="BIGINT"/>
            <result column="user_id" property="userId" jdbcType="BIGINT"/>
            <result column="total" property="total" jdbcType="DECIMAL"/>
            <result column="used" property="used" jdbcType="DECIMAL"/>
            <result column="residue" property="residue" jdbcType="DECIMAL"/>
        </resultMap>
     
        <update id="decrease">
            UPDATE t_account
            SET
              residue = residue - #{money},used = used + #{money}
            WHERE
              user_id = #{userId};
        </update>
     
    </mapper>

##### ⑧、Service接口及实现 #####

AccountService

package com.atguigu.springcloud.alibaba.service;
     
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.ResponseBody;
     
    import java.math.BigDecimal;
     
     
    public interface AccountService { 
     
        /** * 扣减账户余额 */
        void decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money);
    }

AccountServiceImpl

package com.atguigu.springcloud.alibaba.service.impl;
     
     
    import com.atguigu.springcloud.alibaba.dao.AccountDao;
    import com.atguigu.springcloud.alibaba.service.AccountService ;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
     
    import javax.annotation.Resource;
    import java.math.BigDecimal;
    import java.util.concurrent.TimeUnit;
     
    /** * 账户业务实现类 */
    @Service
    public class AccountServiceImpl implements AccountService { 
     
        private static final Logger LOGGER = LoggerFactory.getLogger(AccountServiceImpl.class);
     
     
        @Resource
        AccountDao accountDao;
     
        /** * 扣减账户余额 */
        @Override
        public void decrease(Long userId, BigDecimal money) { 
            
             LOGGER.info("------->account-service中扣减账户余额开始");
            try {  TimeUnit.SECONDS.sleep(20); } catch (InterruptedException e) {  e.printStackTrace(); }
            accountDao.decrease(userId,money);
            LOGGER.info("------->account-service中扣减账户余额结束");
        }
    }

##### ⑨、Controller #####

package com.atguigu.springcloud.alibaba.controller;
     
    import com.atguigu.springcloud.alibaba.domain.CommonResult ;
    import com.atguigu.springcloud.alibaba.service.AccountService ;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
     
    import javax.annotation.Resource;
    import java.math.BigDecimal;
     
    @RestController
    public class AccountController { 
     
        @Resource
        AccountService accountService;
     
        /** * 扣减账户余额 */
        @RequestMapping("/account/decrease")
        public CommonResult decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money){ 
            accountService.decrease(userId,money);
            return new CommonResult(200,"扣减账户余额成功！");
        }
    }

##### ⑩、Config配置 #####

MyBatisConfig

package com.atguigu.springcloud.alibaba.config;
     
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.context.annotation.Configuration;
     
    @Configuration
    @MapperScan({ "com.atguigu.springcloud.alibaba.dao"})
    public class MyBatisConfig { 
     
    }

DataSourceProxyConfig

package com.atguigu.springcloud.alibaba.config;
     
    import com.alibaba.druid.pool.DruidDataSource;
    import io.seata.rm.datasource.DataSourceProxy;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.mybatis.spring.SqlSessionFactoryBean;
    import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
     
    import javax.sql.DataSource;
     
     
    @Configuration
    public class DataSourceProxyConfig { 
     
        @Value("${mybatis.mapperLocations}")
        private String mapperLocations;
     
        @Bean
        @ConfigurationProperties(prefix = "spring.datasource")
        public DataSource druidDataSource(){ 
            return new DruidDataSource();
        }
     
        @Bean
        public DataSourceProxy dataSourceProxy(DataSource dataSource) { 
            return new DataSourceProxy(dataSource);
        }
     
        @Bean
        public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception { 
            SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
            sqlSessionFactoryBean.setDataSource(dataSourceProxy);
            sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(mapperLocations));
            sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
            return sqlSessionFactoryBean.getObject();
        }
     
    }

##### ⑪、主启动 #####

package com.atguigu.springcloud.alibaba;
     
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
     
     
    @SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
    @EnableDiscoveryClient
    @EnableFeignClients
    public class SeataAccountMainApp2003
    { 
        public static void main(String[] args)
        { 
            SpringApplication.run(SeataAccountMainApp2003.class, args);
        }
    }

### 六、Test ###

#### 1、下订单->减库存->扣余额->改（订单）状态 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 9]  
![在这里插入图片描述][20210109222247568.png]

#### 2、数据库初始情况 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 10]

#### 3、正常下单 ####

http://localhost:2001/order/create?userid=1&producrid=1&counr=10&money=100  
数据库情况  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 11]

#### 4、超时异常，没加@GlobalTransactional ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 12]

#### 5、超时异常，添加@GlobalTransactional ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 13]

### 七、Seata之原理简介 ###

#### 1、Seata ####

Simple Extensible Autonomous Transaction Architecture,简单可扩展自治事务框架

#### 2、再看TC/TM/RM三大组件 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 14]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 15]

#### 3、AT模式如何做到对业务的无侵入 ####

##### ①、是什么 #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 16]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 17]

##### ②、一阶段加载 #####

![在这里插入图片描述][20210109222849720.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 18]

##### ③、二阶段提交 #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 19]

##### ④、二阶段回滚 #####

![在这里插入图片描述][20210109222923405.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 20]

#### 4、debug ####

#### 5、补充 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 21]

## SpringCloud Hoxton版 + SpringCloud alibaba学习笔记系列，到此完结 ##

[SpringCloud Hoxton_ _ SpringCloud alibaba_11_-- SpringCloud Alibaba Sentinel]: https://blog.csdn.net/exodus3/article/details/112327499
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70]: /images/20221119/c26e2be6ad6a466d9ba7e7b8e3dffd1e.png
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[http_seata.io_zh-cn]: http://seata.io/zh-cn/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20210109183243852.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM=,size_16,color_FFFFFF,t_70
[2021010918330619.png]: https://img-blog.csdnimg.cn/2021010918330619.png
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[https_github.com_seata_seata_releases]: https://github.com/seata/seata/releases
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[20210109222247568.png]: https://img-blog.csdnimg.cn/20210109222247568.png
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[20210109222849720.png]: https://img-blog.csdnimg.cn/20210109222849720.png
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[20210109222923405.png]: https://img-blog.csdnimg.cn/20210109222923405.png
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