seata-samples

Seata samples bases on https://github.com/seata/seata-samples

As the official samples project includes too many sub projects and the dependencies are so old here we optimize it.

How to setup?

所有示例都需要启动seata server，而seata又依赖配置中心和注册中心，此处以nacos作为配置和注册中心。

1. 启动nacos server以及mysql数据库，参考 部署启动nacos server
2. 启动seata server，下载最新版本并解压 seata release

   1. 初始化seata server的数据库脚本(位于解压目录的 seata-server-2.0.0\seata\script\server\db\mysql.sql)

      mysql> create database seata;
      mysql> use seata
      mysql> source D:\software\seata-server-2.0.0\seata\script\server\db\mysql.sql

   2. 修改seata server的配置文件(位于解压目录的seata-server-2.0.0\seata\conf\application.yml)，可以参考目录中提供的样本application.example.yml进行修改。
      此处仅列出配置文件中需要适配的部分配置，其他配置保持默认即可。

      seata:
        config:
          # support: nacos, consul, apollo, zk, etcd3
          type: nacos
          nacos:
            server-addr: 127.0.0.1:8848
            namespace: seata-server
            group: SEATA_GROUP
            #username: nacos
            #password: nacos
            ##if use MSE Nacos with auth, mutex with username/password attribute
            #access-key: ""
            #secret-key: ""
            data-id: seataServer.properties
        registry:
          # support: nacos, eureka, redis, zk, consul, etcd3, sofa
          type: nacos
          nacos:
            server-addr: 127.0.0.1:8848
            namespace: seata-server
            group: SEATA_GROUP
            application: seata-server
            cluster: default
            ##if use MSE Nacos with auth, mutex with username/password attribute
            #access-key:
            #secret-key:
        store:
          # support: file 、 db 、 redis 、 raft
          mode: db
          db:
            datasource: druid
            db-type: mysql
            driver-class-name: com.mysql.cj.jdbc.Driver
            url: jdbc:mysql://127.0.0.1:3306/seata?rewriteBatchedStatements=true
            user: mysql
            password: mysql
            min-conn: 5
            max-conn: 100
            global-table: global_table
            branch-table: branch_table
            lock-table: lock_table
            distributed-lock-table: distributed_lock
            query-limit: 100
            max-wait: 5000
            #  server:
            #    service-port: 8091 #If not configured, the default is '${server.port} + 1000'

   3. 登录nacos控制台( http://localhost:8848/nacos )，根据上述seata配置文件config段指定的data-id, group, namespace新增配置项(界面中格式选择TEXT)。 配置项的内容参考 seata-server-2.0.0\seata\script\config-center\config.txt 进行裁剪。
      config.txt提供了事务存储的三种配置样例，分别是file,db,redis。此处以db为例，删除对应file和redis的配置，其他配置保留默认即可。
      主要适配修改service和store打头的配置，参考如下：

      #Transaction routing rules configuration, only for the client. transaction group -> cluster
      service.vgroupMapping.default_tx_group=default
      #If you use a registry, you can ignore it
      service.default.grouplist=127.0.0.1:8091
      service.enableDegrade=false
      service.disableGlobalTransaction=false
      
      #Transaction storage configuration, only for the server. The file, db, and redis configuration values are optional.
      store.mode=db
      store.lock.mode=db
      store.session.mode=db
      #Used for password encryption
      store.publicKey=
      
      #These configurations are required if the `store mode` is `db`. If `store.mode,store.lock.mode,store.session.mode` are not equal to `db`, you can remove the configuration block.
      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?useUnicode=true&rewriteBatchedStatements=true
      store.db.user=mysql
      store.db.password=mysql
      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

   4. 启动seata server，进入解压目录执行命令：

      .\bin\seata-server.bat -h 127.0.0.1 -p 8091

      控制台显示类似如下信息，则表示启动成功： "seata server started in 1546 millSeconds"

      如果报错找不到数据库驱动类，则拷贝对应的驱动jar包如 mysql-connector-j-9.3.0.jar到 seata-server/lib目录