Springboot 集成 Seata

Seata 是一款开源的分布式事务解决方案，致力于提供高性能和简单易用的分布式事务服务。Seata 将为用户提供了 AT、TCC、SAGA 和 XA 事务模式，为用户打造一站式的分布式解决方案。Seata官网

1.找到适合的Seata版本

参考：SpringCloudAlibaba SpringCloud SpringBoot 版本对照

依赖版本：

spring-boot：2.3.12.RELEASE

spring-cloud-alibaba：2.2.7.RELEASE

spring-cloud：Hoxton.SR12

nacos：2.0.3

seata: 1.3.0

2.下载合适版本的Seata源码下载

Release v1.3.0 · seata/seata · GitHub

wget https://github.com/seata/seata/archive/refs/tags/v1.3.0.zip
wget https://github.com/seata/seata/archive/refs/tags/v1.3.0.tar.gz

3.配置启动Seata

3.1 初始化数据库

3.1.1 创建seata数据库

3.1.2 初始化表

资源链接：https://github.com/seata/seata/blob/1.3.0/script/server/db/mysql.sql

-- -------------------------------- 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(96),
    `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;

3.2 完善Nacos相关配置

安装配置启动Nacos参考：Linux Nacos 快速启动_nacos linux快速启动-CSDN博客

3.2.1 新建命名空间 seata

3.2.2 修改config.txt

/seata/script/config-center/config.txt

service.vgroupMapping.my_test_tx_group=SEATA_GROUP

store.mode=db

store.db.url=jdbc:mysql://xxxx:3306/seata?useUnicode=true
store.db.user=seata
store.db.password=xxxx

3.2.3 将配置信息推送至nacos

源码目录下：/seata-1.3.0/script/config-center/nacos/nacos-config.sh

chmod +x nacos-config.sh

./nacos-config.sh -h 127.0.0.1 -p 8848 -g SEATA_GROUP -t 61311143-2318-4af4-9180-ebbc0fxxxxx -u nacos -w nacos

-h: host, 默认值 localhost

-p: port, 默认值 8848

-g: 配置分组 默认值 SEATA_GROUP

-t: 命名空间

-u: 用户名, nacos 1.2.0+ 之后添加权限验证 默认为''

-w: 密码, nacos 1.2.0+ 之后添加权限验证 默认为''

 

4. 配置启动Seata服务

wget https://github.com/seata/seata/releases/download/v1.3.0/seata-server-1.3.0.tar.gz
wget https://github.com/seata/seata/releases/download/v1.3.0/seata-server-1.3.0.zip

4.1 修改registry.conf

服务目录下：/seata/conf/registry.conf

注意：命名空间需要与上文中生成的保持一致。

registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"

  nacos {
    application = "seata-server"
    serverAddr = "127.0.0.1:8848"
    group = "SEATA_GROUP"
    namespace = "61311143-2318-4af4-9180-ebxxx"
    username = "nacos"
    password = "nacos"
  }
}
config {
  # file、nacos 、apollo、zk、consul、etcd3、springCloudConfig
  type = "nacos"

  nacos {
    serverAddr = "127.0.0.1:8848"
    namespace = "61311143-2318-4af4-9180-ebxxx"
    group = "SEATA_GROUP"
    username = "nacos"
    password = "nacos"
  }
}

4.2 修改file.conf

服务目录下：/seata/conf/file.conf

## transaction log store, only used in seata-server
store {
  ## store mode: file、db、redis
  mode = "db"

  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"
    driverClassName = "com.mysql.jdbc.Driver"
    url = "jdbc:mysql://Xx:3306/seata"
    user = "seata"
    password = "Xx"
    minConn = 5
    maxConn = 30
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }
}

4.3 启动服务

sh ./bin/seata-server.sh -h 127.0.0.1 -p 8091 -m db 

-h nacos 地址

-p seata服务端口 默认8091

-m 存在事务日志的类型 file 文件 db 数据库 redis...

注意：将合适的数据库链接jar包放到 lib目录，（msyql8+ 使用seata/bin/jdbc/mysql-connector-java-8.0.19.jar）。

5.简单XA模式集成

5.1 业务库中添加表

 参照官网：快速启动 | Seata

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) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
                             `context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci 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) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
                             PRIMARY KEY (`id`) USING BTREE,
                             UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC;

5.2 添加依赖

此版本需要收到手动重新导入依赖包（1.3.0），否则jar冲突导致启动报错。

       
        
        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-seata
            
                
                    io.seata
                    seata-spring-boot-starter
                
            
        
        
            io.seata
            seata-spring-boot-starter
            1.3.0
        

5.3 添加配置

my_test_tx_group使用需要注意。

seata:
  data-source-proxy-mode: XA # 开启XA事务
  registry: # TC服务注册中心的配置，微服务根据这些信息去注册中心获取tc服务地址
    # 参考tc服务自己的registry.conf中的配置
    type: nacos
    nacos: # tc
      server-addr: nacosip
      namespace: "命名空间ID"
      group: SEATA_GROUP
      application: seata-server # tc服务在nacos中的服务名称
      cluster: default #集群
  tx-service-group: my_test_tx_group # 事务组，根据这个获取tc服务的cluster名称
  service:
    grouplist:
      seata-server: 指定seata的IP端口
      vgroup-mapping: # 事务组与TC服务cluster的映射关系
        my_test_tx_group: default

5.4 测试表

参照官网：快速启动 | Seata

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


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

5.4测试代码

5.4.1订单

@RestController
@RequestMapping("/orderTbl")
public class OrderTblController {

    @Resource
    private OrderTblService orderTblService;

    @PostMapping("/add/{userId}/{money}")
    public CxResult add(@PathVariable("userId") String userId, @PathVariable("money") Integer money) {
        return CxResult.success(orderTblService.add(userId, money));
    }

}

public interface OrderTblService extends IService {

    Boolean add(String userId, Integer money);

}

@Service
public class OrderTblServiceImpl extends ServiceImpl implements OrderTblService {

    @DubboReference
    private AccountProviderService accountProviderService;

    @Override
    @GlobalTransactional
    public Boolean add(String userId, Integer money) {
        OrderTbl orderTbl = new OrderTbl();
        orderTbl.setUserId(userId);
        orderTbl.setMoney(money);
        this.save(orderTbl);

        accountProviderService.addRecord(userId, money);
        if (money > 10000) {
            throw new BusinessException(ErrorMsg.COMMON_ERROR_1);
        }
        return Boolean.TRUE;
    }

}

5.4.2 账户

public interface AccountProviderService {

    void addRecord(String userId, Integer money);
}

@DubboService
public class AccountProvider implements AccountProviderService {

    @Resource
    private AccountTblService accountTblService;

    @Override
    @GlobalTransactional
    public void addRecord(String userId, Integer money) {
        AccountTbl accountTbl = new AccountTbl();
        accountTbl.setUserId(userId);
        accountTbl.setMoney(money);
        accountTblService.save(accountTbl);
    }

}