Springboot 集成 Seata-编程知识

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 = InnoDBDEFAULT 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 = InnoDBDEFAULT 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 = InnoDBDEFAULT 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_GROUPstore.mode=dbstore.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、sofatype = "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、springCloudConfigtype = "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、redismode = "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 = 5maxConn = 30globalTable = "global_table"branchTable = "branch_table"lockTable = "lock_table"queryLimit = 100maxWait = 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。

       <!-- seata --><!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-alibaba-seata --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-seata</artifactId><exclusions><exclusion><groupId>io.seata</groupId><artifactId>seata-spring-boot-starter</artifactId></exclusion></exclusions></dependency><dependency><groupId>io.seata</groupId><artifactId>seata-spring-boot-starter</artifactId><version>1.3.0</version></dependency>

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: nacosnacos: # tcserver-addr: nacosipnamespace: "命名空间ID"group: SEATA_GROUPapplication: 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 {@Resourceprivate OrderTblService orderTblService;@PostMapping("/add/{userId}/{money}")public CxResult<Boolean> add(@PathVariable("userId") String userId, @PathVariable("money") Integer money) {return CxResult.success(orderTblService.add(userId, money));}}public interface OrderTblService extends IService<OrderTbl> {Boolean add(String userId, Integer money);}@Service
public class OrderTblServiceImpl extends ServiceImpl<OrderTblMapper, OrderTbl> implements OrderTblService {@DubboReferenceprivate AccountProviderService accountProviderService;@Override@GlobalTransactionalpublic 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 {@Resourceprivate AccountTblService accountTblService;@Override@GlobalTransactionalpublic void addRecord(String userId, Integer money) {AccountTbl accountTbl = new AccountTbl();accountTbl.setUserId(userId);accountTbl.setMoney(money);accountTblService.save(accountTbl);}}