分布式事务问题

只要用到分布式，必然会提及分布式的事务。
在分布式之前，一切组件全都在一台机器上。
在使用分布式之后，单体应用被拆分成微服务应用，原来的三个模块被拆分成三个独立的应用，分别使用三个独立的数据源。
业务操作需要调用三个服务来完成。此时每个服务内部的数据一致性由本地事务来保证，但是全局的数据一致性问题没法保证。

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。

一、Seata简介与安装

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

1.1 相关术语

一个典型的分布式事务过程，可以用分布式处理过程的一ID+三组件模型来描述。
一ID（全局唯一的事务ID）：Transaction ID XID，在这个事务ID下的所有事务会被统一控制
三组件：

• Transaction Coordinator (TC)：事务协调器，维护全局事务的运行状态，负责协调并驱动全局事务的提交或回滚；（Server端，为单独服务器部署）
• Transaction Manager (TM)：事务管理器，控制全局事务的边界，负责开启一个全局事务，并最终发起全局提交或全局回滚的决议；
• Resource Manager (RM)：资源管理器，控制分支事务，负责分支注册、状态汇报，并接收事务协调器的指令，驱动分支（本地）事务的提交和回滚
• Seata分TC、TM和RM三个角色，TC（Server端）为单独服务端部署，TM和RM（Client端）由业务系统集成（微服务）。

  1.2 典型的分布式控制事务流程

1. TM 向 TC 申请开启一个全局事务，全局事务创建成功并生成一个全局唯一的 XID；
2. XID 在微服务调用链路的上下文中传播；（也就是在多个TM，RM中传播）
3. RM 向 TC 注册分支事务，将其纳入 XID 对应全局事务的管辖；
4. TM 向 TC 发起针对 XID 的全局提交或回滚决议；
5. TC 调度 XID 下管辖的全部分支事务完成提交或回滚请求。

1.3 Seata-Server的下载与配置

我这里下载了0.9.0版本跟1.4.2版本（配了半天没配好，后面再填坑），差别还是蛮大的。

1.3.1 修改file.conf文件

解压到指定目录并修改conf目录下的file.conf配置文件。

1. 备份原始file.conf文件。
   1. 主要修改：自定义事务组名称+事务日志存储模式为db+数据库连接信息。
2. 修改file.conf文件
   1. service模块（1.4.2里面没有这个模块，需要自己加）
   2. store模块

## transaction log store, only used in seata-server
store {
  ## store mode: file、db、redis
  mode = "db"
  ## rsa decryption public key
  publicKey = ""
  ## file store property
  file {
    ## store location dir
    dir = "sessionStore"
    # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
    maxBranchSessionSize = 16384
    # globe session size , if exceeded throws exceptions
    maxGlobalSessionSize = 512
    # file buffer size , if exceeded allocate new buffer
    fileWriteBufferCacheSize = 16384
    # when recover batch read size
    sessionReloadReadSize = 100
    # async, sync
    flushDiskMode = async
  }
  ## database store property
  db {
    ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp)/HikariDataSource(hikari) etc.
    datasource = "druid"
    ## mysql/oracle/postgresql/h2/oceanbase etc.
    dbType = "mysql"
    ## mysql 5.xx
    ## driverClassName = "com.mysql.jdbc.Driver"
    ## mysql 8.xx
    driverClassName = "com.mysql.cj.jdbc.Driver"
    ## if using mysql to store the data, recommend add rewriteBatchedStatements=true in jdbc connection param
    ## url = "jdbc:mysql://127.0.0.1:3306/seata?rewriteBatchedStatements=true"
    url = "jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&characterEncoding=utf-8&useSSL=false&nullCatalogMeansCurrent=true&serverTimezone=UTC"
    user = "root"
    password = "10086"
    minConn = 5
    maxConn = 100
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }
  ## redis store property
  redis {
    ## redis mode: single、sentinel
    mode = "single"
    ## single mode property
    single {
      host = "127.0.0.1"
      port = "6379"
    }
    ## sentinel mode property
    sentinel {
      masterName = ""
      ## such as "10.28.235.65:26379,10.28.235.65:26380,10.28.235.65:26381"
      sentinelHosts = ""
    }
    password = ""
    database = "0"
    minConn = 1
    maxConn = 10
    maxTotal = 100
    queryLimit = 100
  }
}
## 1.4.2 版本需要自己手动增加service模块
service {
  #vgroup->rgroup
  vgroup_mapping.my_test_tx_group = "my_group"    
  #only support single node
  default.grouplist = "127.0.0.1:8091"
  #degrade current not support
  enableDegrade = false
  #disable
  disable = false
  #unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanent
  max.commit.retry.timeout = "-1"
  max.rollback.retry.timeout = "-1"
}

1.3.2 数据库中建库建表

数据库新建库seata，建表db_store.sql在\seata-server-0.9.0\seata\conf目录里面

1.3.3 修改seata-server-0.9.0\seata\conf目录下的registry.conf配置文件

目的是：指明注册中心为nacos，及修改nacos连接信息

1.3.4 启动nacos和seata

seata-server-0.9.0\seata\bin\seata-server.bat
启动失败，报错：

解决：0.9.0默认的mysql是5.1.30版本，将lib文件夹下mysql-connector-java-5.1.30.jar删除，替换成自己mysql版本的jar包，我的是mysql-connector-java-8.0.22.jar。
再次启动：

出现这些提示信息代表seata启动成功。
nacos中成功注册了seate：

**Seata 1.4.2版本填坑—-nacos作为seata的注册/配置中心

seata1.2.0 Seata1.4.0+nacos
Seata0.9.0版本不支持集群，生产环境下需要使用1.0.0以上版本。我们这里配置seata的最新版本1.4.2，下载后文件目录如下图所示：

0. 启动nacos

启动nacos，新建一个命名空间seata用于存放seata的配置信息。

注意这里的命名空间ID，后面会用到。这里不新建也可以，seata使用的是public。
我们使用nacos充当seata的注册中心和配置中心！

1. 修改配置文件

①进入conf文件夹，修改file.conf文件

1.4.2版本可以参考file.conf.example(server端)和conf文件夹下README-zh.md中的client端配置

总共需要修改的地方：我这里用seate_1_4_2数据库来对应seata1.4.2版本

最终完整代码file.conf：file.conf.txt

②修改conf\registry.conf文件

思考：这里我们把seata-server端的config设置为了nacos，那么是不是第一步的file.conf文件就不再需要了。因为直接从nacos读取配置？

2. 将配置导入到nacos

① 准备nacos-config.sh脚本

在conf文件夹下，需要有个nacos-config.sh文件，这个文件1.4.2版本没有。README-zh.md文件中访问config-center超链接（https://github.com/seata/seata/tree/develop/script/config-center），nacos文件夹下：

用这个可以直接下当前页的文件github-directory-downloader

nacos-config.sh

② config.txt准备及修改

在conf目录下还需要一个config.txt文件，1.4.2版本同样没有，还是去README里面的config-center超链接。

config.txt需要放在conf的上级目录下。

修改config.txt文件中的内容，主要是下面这几项：

改为使用db存储：

注意这里store.db.url中数据库的名字就是我们之后需要新建的数据库的名字。
相比于其他版本，1.4.2这里多了个distributedLockTable。
整个config.txt文件中，store.publicKey、store.redis.sentinel.masterName、store.redis.sentinel.sentinelHosts、store.redis.password四个属性默认都是空的。所以后面在将config.txt文件中的配置注册到nacos的时候，会出现四个失败项。

③ 导入seata相应的配置项到Nacos

config.txt就是seata各种详细的配置，执行nacos-config.sh即可将这些配置导入到nacos。这样就不需要将file.conf和registry.conf放到我们的项目中了，需要什么配置就直接从nacos中读取。（这句话是参考博客https://blog.csdn.net/jixieguang/article/details/110621561，我觉不完全对，后面registry.conf里的配置项虽然不需要.conf文件配置，但是需要在yml或properties文件中配置，而file.conf可以直接在nacos中读取）
导入配置：

然后在git bash界面输入：

sh nacos-config.sh -h localhost -p 8848 -g SEATA_GROUP -t f0378218-b129-4fd8-839c-9bdfd010205b -u nacos -w nacos

注：h表示nacos的地址，p表示端口号，g表示配置的分组，t表示命名空间的ID，u跟w表示nacos的账户密码。如果没有设置命名空间，而且都是默认选项直接 sh nacos-config.sh -h localhost就行。

可以看到共98项，导入失败4项，就是上面没有值的那四项（不影响，如果用到直接在nacos里面新建配置即可）

可以看到，nacos的seata命名空间中已经导入了配置项。（seata命名空间是我自己创建的，可以按自己的需求创建，不创建默认的就是public。）

3. 数据库中建库建表

我们先创建数据库seata1_4_2（数据库要与config.txt中db设置那里对应），数据库的建表语句在README文件的server连接中：

然后执行mysql.sql（1.4.2多了个distributed_lock表，和一些插入语句）：

-- -------------------------------- The script used when storeMode is 'db' --------------------------------
-- the table to store GlobalSession data
CREATE TABLE IF NOT EXISTS `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`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;
-- the table to store BranchSession data
CREATE TABLE IF NOT EXISTS `branch_table`
(
    `branch_id`         BIGINT       NOT NULL,
    `xid`               VARCHAR(128) NOT NULL,
    `transaction_id`    BIGINT,
    `resource_group_id` VARCHAR(32),
    `resource_id`       VARCHAR(256),
    `branch_type`       VARCHAR(8),
    `status`            TINYINT,
    `client_id`         VARCHAR(64),
    `application_data`  VARCHAR(2000),
    `gmt_create`        DATETIME(6),
    `gmt_modified`      DATETIME(6),
    PRIMARY KEY (`branch_id`),
    KEY `idx_xid` (`xid`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;
-- the table to store lock data
CREATE TABLE IF NOT EXISTS `lock_table`
(
    `row_key`        VARCHAR(128) NOT NULL,
    `xid`            VARCHAR(128),
    `transaction_id` BIGINT,
    `branch_id`      BIGINT       NOT NULL,
    `resource_id`    VARCHAR(256),
    `table_name`     VARCHAR(32),
    `pk`             VARCHAR(36),
    `gmt_create`     DATETIME,
    `gmt_modified`   DATETIME,
    PRIMARY KEY (`row_key`),
    KEY `idx_branch_id` (`branch_id`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;
CREATE TABLE IF NOT EXISTS `distributed_lock`
(
    `lock_key`       CHAR(20) NOT NULL,
    `lock_value`     VARCHAR(20) NOT NULL,
    `expire`         BIGINT,
    primary key (`lock_key`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4;
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('AsyncCommitting', ' ', 0);
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('RetryCommitting', ' ', 0);
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('RetryRollbacking', ' ', 0);
INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('TxTimeoutCheck', ' ', 0);

，这四张表跟config.txt文件中的配置对应。

4. 启动seata

运行bin目录下的seata-server.bat。
出现下面字段表示seata启动成功。seata启动日志在C:\Users\admin\logs\seata文件夹下。

nacos中在seata命名空间内也成功注册，注意这里服务名对应的是registry.conf文件中nacos下面application的值。0.9.0版本好像设置不了这个，默认是serverAddr。

二、订单/库存/账户业务数据库准备

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。

2.1 分布式事务业务说明

这里我们会创建三个服务，一个订单服务，一个库存服务，一个账户服务。
当用户下单时，会在订单服务中创建一个订单，然后通过远程调用库存服务来扣减下单商品的库存，再通过远程调用账户服务来扣减用户账户里面的余额，最后在订单服务中修改订单状态为已完成。
该操作跨越三个数据库，有两次远程调用，很明显会有分布式事务问题。
下订单—->扣库存—->减账户(余额)

2.2 创建业务数据库与表

1. 创建业务数据库

• seata_order：存储订单的数据库；
• seata_storage：存储库存的数据库；
• seata_account：存储账户信息的数据库。 ```sql CREATE DATABASE seata_order;

CREATE DATABASE seata_storage;

CREATE DATABASE seata_account;

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### 2. 按照上述3库分别创建对应业务表
seata_order库下建t_order表：
```sql
CREATE TABLE seata_order.`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;

seata_storage库下建t_storage 表:

CREATE TABLE `seata_storage`.`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');

seata_account库下建t_account 表:

CREATE TABLE `seata_account`.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');

3. 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；1.4.2版本的在README_ZH文件中的client：

注意：0.9版本跟1.4.2版本的undo_log表的属性有差别，1.4.2版本没有id跟ext这两个属性，个人觉得使用上没有影响

这里的话我还是按0.9.0版本来建表。

# 0.9.0 版本
DROP TABLE IF EXISTS `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;
# 1.4.2版本
DROP TABLE IF EXISTS `undo_log`;
CREATE TABLE IF NOT EXISTS `undo_log`
(
    `branch_id`     BIGINT       NOT NULL COMMENT 'branch transaction id',
    `xid`           VARCHAR(128) NOT NULL COMMENT 'global transaction id',
    `context`       VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization',
    `rollback_info` LONGBLOB     NOT NULL COMMENT 'rollback info',
    `log_status`    INT(11)      NOT NULL COMMENT '0:normal status,1:defense status',
    `log_created`   DATETIME(6)  NOT NULL COMMENT 'create datetime',
    `log_modified`  DATETIME(6)  NOT NULL COMMENT 'modify datetime',
    UNIQUE KEY `ux_undo_log` (`xid`, `branch_id`)
) ENGINE = InnoDB
  AUTO_INCREMENT = 1
  DEFAULT CHARSET = utf8 COMMENT ='AT transaction mode undo table';

最终效果： 这里展示了1.4.2版本跟0.9版本，实际中用一个就行，别的版本一样。

三、订单/库存/账户业务微服务准备

业务需求：下订单->减库存->扣余额->改(订单)状态

版本对应关系——很重要

注意：由于seata0.9.0版本跟1.0之后的版本（支持yml、properties配置）区别巨大，这里使用0.9.0版本（跟视频一致），其版本对应关系见版本说明。（seata0.9.0 + nacos 1.1.4 + sentinel 1.7.0 + SpringCloud Alibaba 2.1.1RELEASE）前面用的各组件版本得对应上（头疼）

3.1 新建订单Order-Module——seata-order-service2001

新建seata-order-service2001

(1) pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>jdk8cloud2021</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>seata-order-service2001</artifactId>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <!--nacos-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--seata-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
            <!-- 因为兼容版本问题,所以需要剔除它自带的seata的包 -->
            <exclusions>
                <exclusion>
                    <artifactId>seata-all</artifactId>
                    <groupId>io.seata</groupId>
                </exclusion>
            </exclusions>
        </dependency>
             <!-- 要跟我们安装SeaTa的一致！ -->
        <dependency>
            <groupId>io.seata</groupId>
            <artifactId>seata-all</artifactId>
            <version>0.9.0</version>
        </dependency>
        <!--feign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--web-actuator-->
        <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>
        <!--mysql-druid-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</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>
</project>

(2) application.yml

这里配置的是我们自己微服务的数据源

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file.conf中配置的事务组ID对应
        #vgroup_mapping.my_test_tx_group = "my_group"
        tx-service-group: my_group
    nacos:
      discovery:
        server-addr: localhost:8848
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/seata_order?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
    username: root
    password: 10086
feign:
  hystrix:
    enabled: false
logging:
  level:
    io:
      seata: info
mybatis:
  mapperLocations: classpath:mapper/*.xml

(3) file.conf

程序中依赖的是 seata-all，对应于 *.conf 文件，所以需要在resource新建.conf文件，高版本的支持yml、properties配置。这里仅仅是seata-order-service2001模块的file.conf（配置2001的分布式事务），seata软件那里配置的是总控file.conf。

注意修改这两处：

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 {
  #修改自定义事务组名称，这里跟在seata里配置的不一样，这里只针对2001自己的事务，
  #而seata里针对的是整个分布式全局事务
  #这里要注意 vgroup_mapping. 后面的值，要跟seata-server安装时 conf 文件夹下file.conf service模块设定的
  #vgroup_mapping.my_test_tx_group = "my_group"
  vgroup_mapping.my_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"
    ## 这里要注意mysql5跟mysql8不一样
    driver-class-name = "com.mysql.cj.jdbc.Driver"
    url = "jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC"
    user = "root"
    password = "10086"
    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
  }
}

几个配置文件对应关系

(4) registry.conf

指明注册到nacos中：

registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"
  nacos {
    serverAddr = "localhost:8848"    # 如果nacos不在本机，就写服务器的IP
    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"
  }
}

(5) domain

domain 就是entity（pojo，bean），对应数据库的表，不同公司习惯不一样。
新建Order类与CommonResult类

Order

package com.atguigu.cloudalibaba.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;
    /**
     * 订单状态：0：创建中；1：已完结
     */
    private Integer status;
}

CommonResult

package com.atguigu.cloudalibaba.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);
    }
}

(6) Dao接口及实现(SQL映射文件)

dao中至少要有两个方法，一个是创建订单，一个是修改订单状态

OrderDao

package com.atguigu.cloudalibaba.dao;
import com.atguigu.cloudalibaba.domain.Order;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
/**
 * @author MrLinxi
 * @Description
 * @create 2021-11-10-22:24
 */
@Mapper
public interface OrderDao {
    /**
     * 创建订单
     */
    void create(Order order);
    /**
     * 修改订单状态，从0改为1
     */
    void update(@Param("userId") Long userId, @Param("status") Integer status);
}

OrderMapper.xml

resources文件夹下新建mapper文件夹后添加OrderMapper.xml。完成dao的具体实现。

<?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.cloudalibaba.dao.OrderDao">
    <!--定义一个结果集和实体类的映射表-->
    <resultMap id="BaseResultMap" type="com.atguigu.cloudalibaba.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>

(7) Service接口及实现

Order2001驱动自己，外加调用库存和账户：共3个service

OrderService

package com.atguigu.cloudalibaba.service;
import com.atguigu.cloudalibaba.domain.Order;
public interface OrderService {
    // 创建订单
    void create(Order order);
}

StorageService

package com.atguigu.cloudalibaba.service;
import com.atguigu.cloudalibaba.domain.CommonResult;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
//通过OpenFeign远程调用库存的微服务
@FeignClient(value = "seata-storage-service")
public interface StorageService {
    //扣减库存，比如买了5个1号商品：对1号商品库存减5
    @PostMapping(value = "/storage/decrease")
    CommonResult decrease(@RequestParam("productId") Long productId, @RequestParam("count") Integer count);
}

AccountService

package com.atguigu.cloudalibaba.service;
import com.atguigu.cloudalibaba.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;
//通过OpenFeign远程调用账号微服务
@FeignClient(value = "seata-account-service")
public interface AccountService {
    //扣减账户余额，需要传入用户ID跟扣除的金额
    //@RequestMapping(value = "/account/decrease", method = RequestMethod.POST, produces = "application/json; charset=UTF-8")
    @PostMapping("/account/decrease")
    CommonResult decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money);
}

OrderServiceImpl

package com.atguigu.cloudalibaba.service.Impl;
import com.atguigu.cloudalibaba.dao.OrderDao;
import com.atguigu.cloudalibaba.domain.Order;
import com.atguigu.cloudalibaba.service.AccountService;
import com.atguigu.cloudalibaba.service.OrderService;
import com.atguigu.cloudalibaba.service.StorageService;
import lombok.extern.slf4j.Slf4j;
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
     * 简单说：
     * 下订单->减库存->减余额->改状态
     */
    @Override
    public void create(Order order) {
        log.info("------->下单开始");
        //本应用创建订单
        orderDao.create(order);
        //远程调用库存服务扣减库存
        log.info("------->订单微服务调用库存微服务，扣减库存开始");
        storageService.decrease(order.getProductId(),order.getCount());
        log.info("------->订单微服务调用库存微服务，扣减库存结束");
        //远程调用账户服务扣减余额
        log.info("------->订单微服务调用账户微服务，扣减余额开始");
        accountService.decrease(order.getUserId(),order.getMoney());
        log.info("------->订单微服务调用账户微服务，减余额结束");
        //修改订单状态为已完成
        log.info("------->order-service中修改订单状态开始");
        // 这里的话是不是应该是orderId？
        orderDao.update(order.getUserId(),0);
        log.info("------->order-service中修改订单状态结束");
        log.info("------->下单结束");
    }
}

(8) controller

package com.atguigu.cloudalibaba.controller;
import com.atguigu.cloudalibaba.domain.CommonResult;
import com.atguigu.cloudalibaba.domain.Order;
import com.atguigu.cloudalibaba.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class OrderController {
    @Autowired
    private OrderService orderService;
    //创建订单
    @GetMapping(value = "/order/create")
    public CommonResult create(Order order) {
        orderService.create(order);
        return new CommonResult(200, "订单创建成功!");
    }
}

(9) config

MyBatisConfig

mybatis配置类，绑定实现文件OrderMapper.xml与Dao接口

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

DataSourceProxyConfig

DataSouce的包是sql下的，DataSourceProxy是seata下的，不要搞错了。

package com.atguigu.cloudalibaba.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.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
//使用Seata对数据源进行代理
@Configuration
public class DataSourceProxyConfig {
    @Value("${mybatis.mapperLocations}")
    private String mapperLocations;
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }
    @Bean
//    @Primary
    //DataSourceProxy方法上标注@Primary就可以了，这样就自动用的代理的DataSource(DS的子类)，
    // 而不是Druid的, 否则就需要自己构造sqlSessionFactory
    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();
    }
}

(10) 主启动类

package com.atguigu.cloudalibaba;
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;
@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class) //取消数据源的自动创建
public class SeataOrderMainApp2001 {
    public static void main(String[] args) {
        SpringApplication.run(SeataOrderMainApp2001.class, args);
    }
}

启动测试

先启动nacos-1.1.4和seata-0.9.0，再启动2001。
2001启动成功，成功注册到nacos中


测试nacos-2.0.3和seata-0.9.0，再启动2001 也可以启动成功

3.2 新建库存Storage-Module——seata-storage-service2002

(1) pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>jdk8cloud2021</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>seata-storage-service2002</artifactId>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <!--nacos-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--seata-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
            <!-- 因为兼容版本问题,所以需要剔除它自带的seata的包 -->
            <exclusions>
                <exclusion>
                    <artifactId>seata-all</artifactId>
                    <groupId>io.seata</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--这里引入的版本要跟安装的版本对应-->
        <dependency>
            <groupId>io.seata</groupId>
            <artifactId>seata-all</artifactId>
            <version>0.9.0</version>
        </dependency>
        <!--feign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--web-actuator-->
        <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>
        <!--mysql-druid-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</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>
</project>

(2) application.yml

server:
  port: 2002
spring:
  application:
    name: seata-storage-service
  cloud:
    alibaba:
      seata:
        #自定义事务组名称需要与seata-server中file.conf中配置的事务组ID对应
        #vgroup_mapping.my_test_tx_group = "my_group"
        #        tx-service-group: my_test_tx_group
        tx-service-group: my_group
    nacos:
      discovery:
        server-addr: localhost:8848
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/seata_storage?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
    username: root
    password: 10086
#服务提供端不需要远程调用
#feign:
#  hystrix:
#    enabled: false
logging:
  level:
    io:
      seata: info
mybatis:
  # 扫描类路径下mapper文件夹下的.xml配置文件
  mapperLocations: classpath:mapper/*.xml

(3) file.conf & registry.conf

跟2001的一模一样

(4) domain

Storage

package com.atguigu.cloudalibaba.domian;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
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;
}

CommonResult

package com.atguigu.cloudalibaba.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);
    }
}

(5) Dao接口及实现(SQL映射文件)

StorageDao

package com.atguigu.cloudalibaba.dao;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
@Mapper
public interface StorageDao {
        //扣减库存：根据产品ID扣除
    void decrease(@Param("productId") Long productId, @Param("count") Integer count);
}

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.cloudalibaba.dao.StorageDao">
    <resultMap id="storage" type="com.atguigu.cloudalibaba.domian.Storage">
        <id column="id" property="id" jdbcType="BIGINT"></id>
        <result column="product_id" property="productId" jdbcType="BIGINT"></result>
        <result column="total" property="total" jdbcType="BIGINT"></result>
        <result column="used" property="used" jdbcType="INTEGER"></result>
        <result column="residue" property="residue" jdbcType="INTEGER"></result>
    </resultMap>
    <update id="decrease">
        update `t_storage`
        SET `used` = `used` + #{count}, `residue` = `residue` - #{count}
        WHERE `product_id` = #{productId};
    </update>
</mapper>

(6) Service接口及实现

StorageService

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

StorageServiceImpl

package com.atguigu.cloudalibaba.service.Impl;
import com.atguigu.cloudalibaba.dao.StorageDao;
import com.atguigu.cloudalibaba.service.StorageService;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
@Slf4j
public class StorageServiceImpl implements StorageService {
    private static final Logger LOGGER = LoggerFactory.getLogger(StorageServiceImpl.class);
    @Autowired
    private StorageDao storageDao;
    /**
     * 扣减库存
     * @param productId
     * @param count
     */
    @Override
    public void decrease(Long productId, Integer count) {
//        log.info("-------->storage-service中扣减库存");
        LOGGER.info("-------->storage-service中扣减库存");
        storageDao.decrease(productId, count);
    }
}

(7) Controller

package com.atguigu.cloudalibaba.controller;
import com.atguigu.cloudalibaba.domian.CommonResult;
import com.atguigu.cloudalibaba.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;
    //RequestMapping默认GET POST请求都支持，根据前端自动适应
    @RequestMapping(value = "/storage/decrease")
    public CommonResult decrease(Long productId, Integer count) {
        storageService.decrease(productId, count);
        return new CommonResult(200, "扣减库存成功");
    }
}

(8) config配置

与2001的一模一样

(9) 主启动类

package com.atguigu.cloudalibaba;
import org.mybatis.spring.annotation.MapperScan;
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
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
@EnableFeignClients
public class SeataStorageMainApp2002 {
    public static void main(String[] args) {
        SpringApplication.run(SeataStorageMainApp2002.class, args);
    }
}

启动测试

启动nacos、seata、2002；启动成功，注册进nacos。

3.3 新建账户Account-Module——seata-account-service2003

(1) pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>jdk8cloud2021</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>seata-account-service2003</artifactId>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <!--nacos-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--seata-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
            <!-- 因为兼容版本问题,所以需要剔除它自带的seata的包 -->
            <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>
        <!--feign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--web-actuator-->
        <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>
        <!--mysql-druid-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</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>
</project>