分布式事务-nacos/seata在windows环境下部署及开发

参考资料：

nacos的windows环境部署

seata和nacos的结合及seata开发

参考demo及资料

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nacos在windows环境下的部署：

 nacos在windows下的部署参考文章

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seata加入nacos配置：

1. 首先下载seata安装包：Release v1.7.0(Not Apache release) · apache/incubator-seata · GitHub
2. 然后解压，修改配置文件

打开conf/application.yml进行修改，重点修改nacos部分配置

server:port: 7091spring:application:name: seata-serverlogging:config: classpath:logback-spring.xmlfile:path: ${user.home}/logs/seataextend:logstash-appender:destination: 127.0.0.1:4560kafka-appender:bootstrap-servers: 127.0.0.1:9092topic: logback_to_logstashconsole:user:username: seatapassword: seata
seata:config:# support: nacos, consul, apollo, zk, etcd3type: nacosnacos:server-addr: 127.0.0.1:8848namespace:group: SEATA_GROUPusername:password:context-path:##if use MSE Nacos with auth, mutex with username/password attribute#access-key:#secret-key:data-id: seataServer.propertiesregistry:# support: nacos, eureka, redis, zk, consul, etcd3, sofatype: nacosnacos:application: seata-serverserver-addr: 127.0.0.1:8848group: SEATA_GROUPnamespace:cluster: defaultusername:password:context-path:##if use MSE Nacos with auth, mutex with username/password attribute#access-key:#secret-key:store:# support: file 、 db 、 redismode: file
#  server:
#    service-port: 8091 #If not configured, the default is '${server.port} + 1000'security:secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017tokenValidityInMilliseconds: 1800000ignore:urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.jpeg,/**/*.ico,/api/v1/auth/login

1.  然后在nacos中加入seata配置，注意ID是上述配置文件中的 seataServer.properties，Group与第2步中的保持一致，这里是SEATA_GROUP

#Transaction storage configuration, only for the server.
store.mode=db
store.lock.mode=db
store.session.mode=db#These configurations are required if the `store mode` is `db`.
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.cj.jdbc.Driver
store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useSSL=false&useUnicode=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=admin
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.distributedLockTable=distributed_lock
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000

• 然后就是创建上述配置文件的数据库

-- -------------------------------- 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_status_gmt_modified` (`status` , `gmt_modified`),KEY `idx_transaction_id` (`transaction_id`)
) ENGINE = InnoDBDEFAULT CHARSET = utf8mb4;-- 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 = utf8mb4;-- 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),`status`         TINYINT      NOT NULL DEFAULT '0' COMMENT '0:locked ,1:rollbacking',`gmt_create`     DATETIME,`gmt_modified`   DATETIME,PRIMARY KEY (`row_key`),KEY `idx_status` (`status`),KEY `idx_branch_id` (`branch_id`),KEY `idx_xid` (`xid`)
) ENGINE = InnoDBDEFAULT CHARSET = utf8mb4;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 = InnoDBDEFAULT 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);

• 运行bin下的bat脚本启动服务

• 访问控制面板：http://127.0.0.1:7091

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代码的相关编写（所有的代码会在后面贴出，这里只讲关键代码）

框架的搭建

        关于微服务的搭建此处将不再赘述，可以参考本人的系列文章

        同时需要集成mybatis-plus，就是上面创建的数据库，可以参考本人的系列文章

Seata依赖的添加

        在每个微服务都加入seata依赖

<!-- 注意一定要引入对版本，要引入spring-cloud版本seata，而不是springboot版本的seata-->
<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-seata</artifactId><!-- 排除掉springcloud默认的seata版本，以免版本不一致出现问题--><exclusions><exclusion><groupId>io.seata</groupId><artifactId>seata-spring-boot-starter</artifactId></exclusion><exclusion><groupId>io.seata</groupId><artifactId>seata-all</artifactId></exclusion></exclusions>
</dependency>
<dependency><groupId>io.seata</groupId><artifactId>seata-spring-boot-starter</artifactId><version>1.7.0</version>
</dependency>

简单的业务逻辑编写---XA分布式事务

每个YML文件需要配置事务组和事务的类型（此处为XA）

service.vgroup-mapping下一定要有一个对应这个名字的映射，映射到default（seata默认的集群名称），seata_tx_group为我们自定义的事务组，名字随便起

data-source-proxy-mode 为所用的事务模式，默认AT

 nacos方面，我们仅配置注册项，根据个人配置

#seata客户端配置
seata:enabled: trueapplication-id: seata_txtx-service-group: seata_tx_groupservice:vgroup-mapping:seata_tx_group: defaultregistry:type: nacosnacos:application: seata-serverserver-addr: 127.0.0.1:8848namespace:group: SEATA_GROUPdata-source-proxy-mode: XA

XA模式实现

关于分布式事务，只需要全局事务标签：@GlobalTransactional，每个本地事务加上@Transactional和不加效果一样，但是建议还是加上

关于完成的源码见参考demo

下面是demo的数据库结构