目录

1、nacos作为注册中心

2、seata 

2.1 去官网下载seata-1.2.0版本：下载中心

2.2 下载完进入到conf目录修改配置文件：registry.conf、file.conf

2.2.1 registry.conf文件：

2.2.2 file.conf 文件

2.3 上传nacos配置

2.3.1 下载源码，进入scriptconfig-centernacos目录下执行 nacos-config.sh，结果如下：

2.3.2 启动nacos注册中心，可以查看注册进来的列表：

2.3.3 启动seata服务，进入到bin目录下，双击执行seata-server.bat

调用micro-web，验证分布式事物，重点是配置">3、构建SpringCloud服务 ，服务micro-order ——>调用micro-web，验证分布式事物，重点是配置

3.1 服务micro-order

3.1.1 micro-order服务引入pom依赖

3.1.2 application.yml文件增加seata配置

3.1.3 bootstrap.properties文件 

3.1.4 测试类Controller加分布式事物注解 @GlobalTransactional

3.2 服务micro-web

3.2.1 micro-web服务引入pom依赖

3.2.2 application.yml文件增加seata配置

3.2.3 bootstrap.properties文件 

3.2.4 测试类Service，本服务ORM框架用的是MyBatisPlus

 4、数据库表结构

4.1 seata必用的表结构可以去官网找，再找到undo_log表

4.2 测试表结构

​5、验证结果

5.1 启动服务micro-order、micro-web，seata窗口显示类似信息

5.2 登录nacos地址，micro-order、micro-web、seata已经注册进去

5.3 访问服务接口http://127.0.0.1:18084/dxxx/updateById

1、nacos作为注册中心

2、seata 

2.1 去官网下载seata-1.2.0版本：下载中心

2.2 下载完进入到conf目录修改配置文件：registry.conf、file.conf

2.2.1 registry.conf文件：

注意：① type = "nacos"，nacos作为注册中心写nacos，eureka作为注册中心写eureka；

②serverAddr = "localhost:8848" ，没有修改nacos端口号，可以这么写“serverAddr = "localhost”；

③ config标签中的type = "nacos"，也要修改，参照“注意①”

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

  nacos {
    application = "seata-server"
    serverAddr = "localhost:8848"
    namespace = ""
    cluster = "default"
    username = ""
    password = ""
  }
  eureka {
    serviceUrl = "http://localhost:18763/eureka"
    application = "default"
    weight = "1"
  }
  redis {
    serverAddr = "localhost:6379"
    db = 0
    password = ""
    cluster = "default"
    timeout = 0
  }
  zk {
    cluster = "default"
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
  }
  consul {
    cluster = "default"
    serverAddr = "127.0.0.1:8500"
  }
  etcd3 {
    cluster = "default"
    serverAddr = "http://localhost:2379"
  }
  sofa {
    serverAddr = "127.0.0.1:9603"
    application = "default"
    region = "DEFAULT_ZONE"
    datacenter = "DefaultDataCenter"
    cluster = "default"
    group = "SEATA_GROUP"
    addressWaitTime = "3000"
  }
  file {
    name = "file.conf"
  }
}

config {
  # file、nacos 、apollo、zk、consul、etcd3
  type = "nacos"

  nacos {
    serverAddr = "localhost:8848"
    namespace = ""
    group = "SEATA_GROUP"
    username = ""
    password = ""
  }
  consul {
    serverAddr = "127.0.0.1:8500"
  }
  apollo {
    appId = "seata-server"
    apollometa = "http://192.168.1.204:8801"
    namespace = "application"
  }
  zk {
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
  }
  etcd3 {
    serverAddr = "http://localhost:2379"
  }
  file {
    name = "file.conf"
  }
}

例：

2.2.2 file.conf 文件

注意：store标签后的mode = "db"要修改成对应的，用文件形式配置file，数据库形式配置db

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

  ## file store property
  file {
    ## store location dir
    dir = "sessionStore"
    # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
    maxBranchSessionSize = 16384
    # globe session size , if exceeded throws exceptions
    maxGlobalSessionSize = 512
    # file buffer size , if exceeded allocate new buffer
    fileWriteBufferCacheSize = 16384
    # when recover batch read size
    sessionReloadReadSize = 100
    # async, sync
    flushDiskMode = async
  }

  ## database store property
  db {
    ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.
    datasource = "druid"
    ## mysql/oracle/postgresql/h2/oceanbase etc.
    dbType = "mysql"
    driverClassName = "com.mysql.jdbc.Driver"
    url = "jdbc:mysql://127.0.0.1:3306/seata?serverTimezone=UTC"
    user = "root"
    password = "123456"
    minConn = 5
    maxConn = 30
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }
}

例：

2.3 上传nacos配置

2.3.1 下载源码，进入scriptconfig-centernacos目录下执行 nacos-config.sh，结果如下：

2.3.2 启动nacos注册中心，可以查看注册进来的列表：

2.3.3 启动seata服务，进入到bin目录下，双击执行seata-server.bat

运行结果：

3、构建SpringCloud服务 ，服务micro-order ——>调用micro-web，验证分布式事物，重点是配置

3.1 服务micro-order

3.1.1 micro-order服务引入pom依赖

        
            org.springframework.boot
            spring-boot-starter-web
            ${spring-boot-version}
        

        
        
        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-nacos-config
            2.2.0.RELEASE
        
        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-nacos-discovery
            2.2.0.RELEASE
        

        
            org.projectlombok
            lombok
            1.18.10
            true
        
        
        
            com.xiangxue.geo
            micro-web
            1.0-SNAPSHOT
        

        
        
        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-seata
            2.1.3.RELEASE
            
                
                    io.seata
                    seata-spring-boot-starter
                
            
        
        
            io.seata
            seata-spring-boot-starter
            1.2.0
        
        


    

3.1.2 application.yml文件增加seata配置

seata:
  enabled: true
  application-id: micro-order
  tx-service-group: my_test_tx_group
  enable-auto-data-source-proxy: true
  use-jdk-proxy: false
  config:
    type: nacos
    nacos:
      namespace:
      serverAddr: 127.0.0.1:8848
      group: SEATA_GROUP
      userName: ""
      password: ""
  registry:
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      namespace:
      userName: ""
      password: ""

3.1.3 bootstrap.properties文件 

spring.application.name=micro-order
server.port=18084

#20211104
#eureka.client.serviceUrl.defaultZone=http://localhost:18763/eureka/
spring.cloud.nacos.config.server-addr=127.0.0.1:8848
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/seata?serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456

3.1.4 测试类Controller加分布式事物注解 @GlobalTransactional

3.2 服务micro-web

3.2.1 micro-web服务引入pom依赖

3.2.2 application.yml文件增加seata配置

seata:
  enabled: true
  application-id: micro-web
  tx-service-group: my_test_tx_group
  enable-auto-data-source-proxy: true
  use-jdk-proxy: true
  config:
    type: nacos
    nacos:
      namespace:
      serverAddr: 127.0.0.1:8848
      group: SEATA_GROUP
      userName: ""
      password: ""
  registry:
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      namespace:
      userName: ""
      password: ""

3.2.3 bootstrap.properties文件 

spring.application.name=micro-web
server.port=18083

#eureka.client.serviceUrl.defaultZone=http://localhost:18763/eureka/
spring.cloud.nacos.config.server-addr=127.0.0.1:8848
#当前微服务去nacos上拉去配置必须加
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/seata?serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456

mybatis-plus.mapper-locations=classpath*:mapper/*.xml
mybatis-plus.type-aliases-package=com.xiangxue..entity

3.2.4 测试类Service，本服务ORM框架用的是MyBatisPlus

 4、数据库表结构

4.1 seata必用的表结构可以去官网找，再找到undo_log表

4.2 测试表结构

5、验证结果

5.1 启动服务micro-order、micro-web，seata窗口显示类似信息

5.2 登录nacos地址，micro-order、micro-web、seata已经注册进去

 

5.3 访问服务接口http://127.0.0.1:18084/dxxx/updateById

service层有

System.out.println(1/0); 所以数据更新失败，seata起作用，去掉输出语句数据更新成功。