分布式事务Seata集成案例

最后更新于:2022-04-02 07:21:27

# seata整合案例 [TOC] ## **准备环境** 1. 数据库:jeecg_order(订单数据库),jeecg_account(账户数据库),jeecg_product(商品数据库),seata(seata数据库),以上数据库脚步已存放至jeecg-cloud-test-seata示例中,文件位置如下图所示 https://gitee.com/herodotus/vuetify-form-generator.git 2. 示例代码: jeecg-cloud-test-seata-order(下单服务) jeecg-cloud-test-seata-product(库存服务) jeecg-cloud-test-seata-account(账户服务) 该示例场景用于下单时检测库存是否车充足,余额是否充足,有一个不满足是则回滚事务 3. 配置中心: Nacos(1.3.0+),非必须,可使用nacos作为seata的配置中心 新建seataServer.properties配置文件内容如下 ``` # 数据存储方式,db代表数据库 store.mode=db store.db.datasource=druid store.db.dbType=mysql store.db.driverClassName=com.mysql.cj.jdbc.Driver store.db.url=jdbc:mysql://localhost:3300/seata?useUnicode=true&rewriteBatchedStatements=true&serverTimezone=Asia/Shanghai store.db.user=root store.db.password=root store.db.minConn=5 store.db.maxConn=30 store.db.globalTable=global_table store.db.branchTable=branch_table store.db.queryLimit=100 store.db.lockTable=lock_table store.db.maxWait=5000 # 事务、日志等配置 server.recovery.committingRetryPeriod=1000 server.recovery.asynCommittingRetryPeriod=1000 server.recovery.rollbackingRetryPeriod=1000 server.recovery.timeoutRetryPeriod=1000 server.maxCommitRetryTimeout=-1 server.maxRollbackRetryTimeout=-1 server.rollbackRetryTimeoutUnlockEnable=false server.undo.logSaveDays=7 server.undo.logDeletePeriod=86400000 # 客户端与服务端传输方式 transport.serialization=seata transport.compressor=none # 关闭metrics功能,提高性能 metrics.enabled=false metrics.registryType=compact metrics.exporterList=prometheus metrics.exporterPrometheusPort=9898 ``` 4. seata服务端:本次实践的seata版本为v1.4.2,下载地址 [http://seata.io/zh-cn/blog/download.html](http://seata.io/zh-cn/blog/download.html) 安装服务端 下载下来进行解压,目录结构如下: ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/cb/cd/cbcd27fb8c9723d49c8e527bc914852e_722x257.png) 2. 进入bin目录启动seata,seata默认端口是8091 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/f0/9e/f09ea5dc45376fe5581b6b5a027d3eb0_814x144.png) 3. window下运行seata-server.bat linux下运行seata-server.sh ## **测试分布式事务** 1. 修改file.conf文件(如果需要使用nacos则修改type=nacos),如下图 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/9f/9a/9f9a09181ace41f4d8eb996d1d202878_923x512.png) 2. 修registry.conf(如果需要使用nacos则修改type=nacos),如下图 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/21/04/2104b12bc69448e6e20e343092f55e8a_1086x700.png) ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/9b/98/9b983803cfbda90901472b1f80c90837_1160x756.png) 3. 启动seata,如下图 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/bd/83/bd833b147f7dd4228ba4d1e43e220476_849x308.png) 输入如下信息后表示启动成功 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/64/f0/64f068a3a48e7f8f755868fb9a282be3_1321x743.png) 4.微服务模块添加依赖,具体参考示例代码 ~~~ org.jeecgframework.boot jeecg-boot-starter-cloud 3.1.0 org.jeecgframework.boot jeecg-boot-starter-seata 3.1.0 ~~~ 5.微服务模块添加配置,具体参考示例代码 ``` seata: enable-auto-data-source-proxy: false service: grouplist: default: 127.0.0.1:8091 vgroup-mapping: springboot-seata-group: default # seata 事务组编号 用于TC集群名 tx-service-group: springboot-seata-group ``` 6.启动测试 依次启动 jeecg-cloud-test-seata-order(下单服务) jeecg-cloud-test-seata-product(库存服务) jeecg-cloud-test-seata-account(账户服务) 启动完成如下图 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2d/2b/2d2bf2b543ab1083299f0abb8af7c233_744x193.png) 浏览器输入http://localhost:5001 即可进行测试,如下图所示 测试正常下参数见截图 ![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2f/75/2f7529ae27d9319c3766ef93877a8c44_1077x653.png) 测试余额不足,测试库存不足,然后观察数据库订单表插入数据是否回滚 注:本示例不通过网关所以需要排除认证权限ShiroConfig.java添加如下代码 ~~~ //测试模块排除 filterChainDefinitionMap.put("/test/seata/**", "anon"); ~~~
';