分布式事务解决方案（2） -- Seata+SpringCloud+Nacos整合

小咪咪 2023-01-22 03:55 28阅读 0赞

Seata的介绍我这里就不多说了，大家可以看下阿里Seata的官网。  
[官网][Link 1]

## 1 准备工作 ##

#### 1.1 版本说明 ####

Seata的实现对版本控制比较严格，在搭建过程中，我遇到了很多坑，基本上都是版本问题，要按照官网要求对版本做统一。  
组件版本关系  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70]  
毕业版本依赖关系(推荐使用)  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 1]  
按照上面的要求对应好版本。

#### 1.2 环境介绍 ####

*  环境：windows10
 *  nacos启动包： Nacos 1.1.3
 *  seata启动包：1.4.0
 *  springCloud依赖：2020.0.2
 *  spring-boot-starter-parent：2.4.2
 *  spring-cloud-starter-alibaba-seata：2021.1
 *  seata-spring-boot-starter：1.3.0（这个可以与启动包不一样，但是尽量保持一致）

#### 1.3 下载地址 ####

安装包下载  
[Seata下载][Seata]

[Nacos下载][Nacos]

#### 1.4 启动Nacos安装包 ####

## 2 数据库创建 ##

#### 2.1 数据库要求 ####

创建三个数据库，一个是seata本身数据库，两个业务数据库（分别都要包含undo\_log表）  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 2]

要求：具有InnoDB引擎的MySQL。

#### 2.2 seata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_gmt_modified_status` (`gmt_modified`, `status`),
        KEY `idx_transaction_id` (`transaction_id`)
    ) ENGINE = InnoDB
      DEFAULT 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 = InnoDB
      DEFAULT CHARSET = utf8;
    
    -- 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),
        `gmt_create`     DATETIME,
        `gmt_modified`   DATETIME,
        PRIMARY KEY (`row_key`),
        KEY `idx_branch_id` (`branch_id`)
    ) ENGINE = InnoDB
      DEFAULT CHARSET = utf8;
    
    CREATE TABLE `undo_log` (
      `id` BIGINT(20) NOT NULL AUTO_INCREMENT,
      `branch_id` BIGINT(20) NOT NULL,
      `xid` VARCHAR(100) NOT NULL,
      `context` VARCHAR(128) 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) DEFAULT NULL,
      PRIMARY KEY (`id`),
      UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
    ) ENGINE=INNODB DEFAULT CHARSET=utf8

#### 2.3 seata\_account数据库 ####

CREATE TABLE `t_account` (
      `id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT 'id',
      `user_id` bigint(11) DEFAULT NULL COMMENT '用户id',
      `total` decimal(10,0) DEFAULT NULL COMMENT '总额度',
      `used` decimal(10,0) DEFAULT NULL COMMENT '已用余额',
      `residue` decimal(10,0) DEFAULT '0' COMMENT '剩余可用额度',
      PRIMARY KEY (`id`) USING BTREE
    ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC
    
    
    CREATE TABLE `undo_log` (
      `id` bigint(20) NOT NULL AUTO_INCREMENT,
      `branch_id` bigint(20) NOT NULL,
      `xid` varchar(100) NOT NULL,
      `context` varchar(128) 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) DEFAULT NULL,
      PRIMARY KEY (`id`),
      UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8

#### 2.4 seata\_order数据库 ####

CREATE TABLE `t_order` (
      `id` bigint(10) NOT NULL AUTO_INCREMENT,
      `user_id` bigint(10) DEFAULT NULL,
      `product_id` bigint(10) DEFAULT NULL,
      `count` int(11) DEFAULT NULL,
      `money` decimal(11,0) DEFAULT NULL,
      `status` int(1) DEFAULT NULL,
      PRIMARY KEY (`id`) USING BTREE
    ) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8 COLLATE=utf8_bin ROW_FORMAT=DYNAMIC
    
    CREATE TABLE `undo_log` (
      `id` bigint(20) NOT NULL AUTO_INCREMENT,
      `branch_id` bigint(20) NOT NULL,
      `xid` varchar(100) NOT NULL,
      `context` varchar(128) 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) DEFAULT NULL,
      PRIMARY KEY (`id`),
      UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8

## 3 seata-server配置 ##

备份再修改  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 3]

#### 3.1 file.conf 配置 ####

store {
     ## store mode: file、db、redis
     mode = "db"
    	## database store property
    	 db {
    	 ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp)/HikariDataSource(hikari) etc.
    	 datasource = "hikari"
    	 ## mysql/oracle/postgresql/h2/oceanbase etc.
    	 dbType = "mysql"
    	 driverClassName = "com.mysql.cj.jdbc.Driver"
    	 url = "jdbc:mysql://127.0.0.1:3308/seata?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=true"
    	 user = "root"
    	 password = "123456"
    	 minConn = 5
    	 maxConn = 100
    	 globalTable = "global_table"
    	 branchTable = "branch_table"
    	 lockTable = "lock_table"
    	 queryLimit = 100
    	 maxWait = 5000
    	 }
    	}

#### 3.2 registry.conf配置 ####

registry {
      # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
      type = "nacos"
    
      nacos {
        application = "seata-server"
        serverAddr = "127.0.0.1:8848"
        group = "SEATA_GROUP"
        namespace ="public"
        cluster = "default"
        username = "nacos"
        password = "nacos"
      }
    
    }
    
    config {
      # file、nacos 、apollo、zk、consul、etcd3
      type = "nacos"
    
      nacos {
        serverAddr = "127.0.0.1:8848"
        namespace = "public"
        group = "SEATA_GROUP"
        username = "nacos"
        password = "nacos"
      }
    }

## 4 修改文件配置 ##

主要是为了将seata的一些配置信息配置到nacos上面（类似于配置中心的效果）。

[config.txt 配置文件地址][config.txt]  
[nacos-config.sh 配置文件地址][nacos-config.sh]

config.txt

transport.type=TCP
    transport.server=NIO
    transport.heartbeat=true
    transport.enableClientBatchSendRequest=true
    transport.threadFactory.bossThreadPrefix=NettyBoss
    transport.threadFactory.workerThreadPrefix=NettyServerNIOWorker
    transport.threadFactory.serverExecutorThreadPrefix=NettyServerBizHandler
    transport.threadFactory.shareBossWorker=false
    transport.threadFactory.clientSelectorThreadPrefix=NettyClientSelector
    transport.threadFactory.clientSelectorThreadSize=1
    transport.threadFactory.clientWorkerThreadPrefix=NettyClientWorkerThread
    transport.threadFactory.bossThreadSize=1
    transport.threadFactory.workerThreadSize=default
    transport.shutdown.wait=3
    service.vgroupMapping.my_test_tx_group=default
    service.default.grouplist=127.0.0.1:8091
    service.enableDegrade=false
    service.disableGlobalTransaction=false
    client.rm.asyncCommitBufferLimit=10000
    client.rm.lock.retryInterval=10
    client.rm.lock.retryTimes=30
    client.rm.lock.retryPolicyBranchRollbackOnConflict=true
    client.rm.reportRetryCount=5
    client.rm.tableMetaCheckEnable=false
    client.rm.tableMetaCheckerInterval=60000
    client.rm.sqlParserType=druid
    client.rm.reportSuccessEnable=false
    client.rm.sagaBranchRegisterEnable=false
    client.rm.tccActionInterceptorOrder=-2147482648
    client.tm.commitRetryCount=5
    client.tm.rollbackRetryCount=5
    client.tm.defaultGlobalTransactionTimeout=60000
    client.tm.degradeCheck=false
    client.tm.degradeCheckAllowTimes=10
    client.tm.degradeCheckPeriod=2000
    client.tm.interceptorOrder=-2147482648
    store.lock.mode=file
    store.session.mode=file
    store.publicKey=
    store.file.dir=file_store/data
    store.file.maxBranchSessionSize=16384
    store.file.maxGlobalSessionSize=512
    store.file.fileWriteBufferCacheSize=16384
    store.file.flushDiskMode=async
    store.file.sessionReloadReadSize=100
    store.db.datasource=druid
    store.db.dbType=mysql
    store.db.driverClassName=com.mysql.jdbc.Driver
    store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&rewriteBatchedStatements=true
    store.db.user=username
    store.db.password=password
    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
    store.redis.mode=single
    store.redis.single.host=127.0.0.1
    store.redis.single.port=6379
    store.redis.sentinel.masterName=
    store.redis.sentinel.sentinelHosts=
    store.redis.maxConn=10
    store.redis.minConn=1
    store.redis.maxTotal=100
    store.redis.database=0
    store.redis.password=
    store.redis.queryLimit=100
    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.distributedLockExpireTime=10000
    client.undo.dataValidation=true
    client.undo.logSerialization=jackson
    client.undo.onlyCareUpdateColumns=true
    server.undo.logSaveDays=7
    server.undo.logDeletePeriod=86400000
    client.undo.logTable=undo_log
    client.undo.compress.enable=true
    client.undo.compress.type=zip
    client.undo.compress.threshold=64k
    log.exceptionRate=100
    transport.serialization=seata
    transport.compressor=none
    metrics.enabled=false
    metrics.registryType=compact
    metrics.exporterList=prometheus
    metrics.exporterPrometheusPort=9898

注意修改如下位置：  
修改后的如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 4]

transport.type=TCP
    transport.server=NIO
    transport.heartbeat=true
    transport.enableClientBatchSendRequest=true
    transport.threadFactory.bossThreadPrefix=NettyBoss
    transport.threadFactory.workerThreadPrefix=NettyServerNIOWorker
    transport.threadFactory.serverExecutorThreadPrefix=NettyServerBizHandler
    transport.threadFactory.shareBossWorker=false
    transport.threadFactory.clientSelectorThreadPrefix=NettyClientSelector
    transport.threadFactory.clientSelectorThreadSize=1
    transport.threadFactory.clientWorkerThreadPrefix=NettyClientWorkerThread
    transport.threadFactory.bossThreadSize=1
    transport.threadFactory.workerThreadSize=default
    transport.shutdown.wait=3
    service.vgroupMapping.my_test_tx_group=default
    service.default.grouplist=127.0.0.1:8091
    service.enableDegrade=false
    service.disableGlobalTransaction=false
    client.rm.asyncCommitBufferLimit=10000
    client.rm.lock.retryInterval=10
    client.rm.lock.retryTimes=30
    client.rm.lock.retryPolicyBranchRollbackOnConflict=true
    client.rm.reportRetryCount=5
    client.rm.tableMetaCheckEnable=false
    client.rm.tableMetaCheckerInterval=60000
    client.rm.sqlParserType=druid
    client.rm.reportSuccessEnable=false
    client.rm.sagaBranchRegisterEnable=false
    client.rm.tccActionInterceptorOrder=-2147482648
    client.tm.commitRetryCount=5
    client.tm.rollbackRetryCount=5
    client.tm.defaultGlobalTransactionTimeout=60000
    client.tm.degradeCheck=false
    client.tm.degradeCheckAllowTimes=10
    client.tm.degradeCheckPeriod=2000
    client.tm.interceptorOrder=-2147482648
    store.lock.mode=file
    store.session.mode=file
    store.publicKey=ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDdrai/dkSBEKGfh8TRd5zYKjcZsfPguwX0/3+CrRYVid0921nJAKhVCbvdmbBceindeW3SaNRANIU9fzGt8KeHV1aBaaSs8JNG7EweM0o9KFQlzY4QOqvDclFHeqJXHrDYgDDJkZGZEHxr7dChdZNV5WzGrqAQdOlmfkxEXCxjRGoW3P2Af8XesER8W3WQuKL0omJSMS6qXtdVpvn/lInbHYMHmdfQdSPoUkXC1RESLda8KhwmFFuV4bu7pldjJ8aImen3gMvsCx8sFwKjKO3ic6IWF494jMDohFUUImDQqMqxxO2kzwYx0F6OuuJnvCUQCg2+LIhQznvQSZYHnH3Bd Administrator@DESKTOP-KK7M9K5
    store.file.dir=file_store/data
    store.file.maxBranchSessionSize=16384
    store.file.maxGlobalSessionSize=512
    store.file.fileWriteBufferCacheSize=16384
    store.file.flushDiskMode=async
    store.file.sessionReloadReadSize=100
    store.db.datasource=hikari
    store.db.dbType=mysql
    store.db.driverClassName=com.mysql.jdbc.Driver
    store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&rewriteBatchedStatements=true
    store.db.user=root
    store.db.password=123456
    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
    store.redis.mode=single
    store.redis.single.host=192.168.1.245
    store.redis.single.port=6379
    store.redis.sentinel.masterName=root
    store.redis.sentinel.sentinelHosts=192.168.1.245
    store.redis.maxConn=10
    store.redis.minConn=1
    store.redis.maxTotal=100
    store.redis.database=0
    store.redis.password=1111111
    store.redis.queryLimit=100
    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.distributedLockExpireTime=10000
    client.undo.dataValidation=true
    client.undo.logSerialization=jackson
    client.undo.onlyCareUpdateColumns=true
    server.undo.logSaveDays=7
    server.undo.logDeletePeriod=86400000
    client.undo.logTable=undo_log
    client.undo.compress.enable=true
    client.undo.compress.type=zip
    client.undo.compress.threshold=64k
    log.exceptionRate=100
    transport.serialization=seata
    transport.compressor=none
    metrics.enabled=false
    metrics.registryType=compact
    metrics.exporterList=prometheus
    metrics.exporterPrometheusPort=9898

将两个文件复制到seata文件夹下面：

**注意：config.txt文件必须在nacos-config.sh的上级目录**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 5]  
文件放好以后，使用nacos-config.sh同步配置到nacos

sh nacos-config.sh 127.0.0.1

windows系统使用Git Bash执行，打开git bash是在nacos-config.sh所在的文件夹下。

执行成功后提示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 6]  
如果失败了 就要去看哪些选项失败了，里面有错误提示。

然后启动seata-server。

## 5 搭建客户端服务 ##

就此准备工作已经完成，咱们现在需要创建两个微服务，将其注册到nacos上，然后通过服务之间的调用，并且在一个请求中同时操作两个数据源（增删改），使用seata指定的事务注解，看能不能达到一个数据源的事务失败，另外一个就会回滚。

我有两个微服务，一个是seata-order-service，一个是seata-account-service。

#### 5.1 seata-order-service ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 7]

###### 5.1.1 pom.xml ######

*  重点关注：  
    springcloud版本  
    springboot版本  
    spring-cloud-starter-alibaba-seata版本  
    seata-spring-boot-starter的版本  
    spring-cloud-starter-alibaba-nacos-discovery的版本
 *  我没有用mybatis用的是jpa，这都无所谓 不受影响。
 *  同时也要注意springcloud其他组件（fegin等）的版本，最好的办法就是在创建项目的时候生成，尽量别后期选用。

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.4.2</version>
            <relativePath/> 
        </parent>
        <groupId>com.wuk</groupId>
        <artifactId>seata-order-service</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>seata-order-service</name>
        <description>Demo project for Spring Boot</description>
        <properties>
            <java.version>1.8</java.version>
            <spring-cloud.version>2020.0.2</spring-cloud.version>
        </properties>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-loadbalancer</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <scope>runtime</scope>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
                <exclusions>
                    <exclusion>
                        <groupId>org.junit.vintage</groupId>
                        <artifactId>junit-vintage-engine</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>2021.1</version>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
                <version>2021.1</version>
                <exclusions>
                    
                    <exclusion>
                        <artifactId>seata-all</artifactId>
                        <groupId>io.seata</groupId>
                    </exclusion>
                    
                    <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>
    
        </dependencies>
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <excludes>
                            <exclude>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok</artifactId>
                            </exclude>
                        </excludes>
                    </configuration>
                </plugin>
            </plugins>
        </build>
        <repositories>
            <repository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </repository>
            <repository>
                <id>spring-snapshots</id>
                <name>Spring Snapshots</name>
                <url>https://repo.spring.io/snapshot</url>
                <releases>
                    <enabled>false</enabled>
                </releases>
            </repository>
        </repositories>
        <pluginRepositories>
            <pluginRepository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </pluginRepository>
            <pluginRepository>
                <id>spring-snapshots</id>
                <name>Spring Snapshots</name>
                <url>https://repo.spring.io/snapshot</url>
                <releases>
                    <enabled>false</enabled>
                </releases>
            </pluginRepository>
        </pluginRepositories>
    
    </project>

###### 5.1.2 配置文件 ######

server:
      port: 2004
    logging:
      level:
        io:
          seata: info
    spring:
      application:
        name: seata-order-service
      datasource:
        url: jdbc:mysql://127.0.0.1:3306/seata_order?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=UTC
        username: root
        password: 123456
        driver-class-name: com.mysql.jdbc.Driver
        type: com.zaxxer.hikari.HikariDataSource
        hikari:
          minimum-idle: 5
          ## 空闲连接存活最大时间，默认600000（10分钟）
          idle-timeout: 600000
          ## 连接池最大连接数，默认是10
          maximum-pool-size: 100
          ## 此属性控制从池返回的连接的默认自动提交行为,默认值：true
          auto-commit: true
          ## 此属性控制池中连接的最长生命周期，值0表示无限生命周期，默认1800000即30分钟
          max-lifetime: 1800000
          ## 数据库连接超时时间,默认30秒，即30000
          connection-timeout: 30000
          connection-test-query: SELECT 1
      jpa:
        database: mysql
        generate-ddl: false
        hibernate:
          ddl-auto: none
          naming:
            physical-strategy: org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy
        show-sql: true
        database-platform: org.hibernate.dialect.MySQL55Dialect
        open-in-view: false
    
    seata:
      enabled: true
      # 该属性需要与前面config.txt文件中的service.vgroupMapping后的值保持一致
      tx-service-group: my_test_tx_group
      config:
        type: nacos
        nacos:
          namespace:
          serverAddr: 127.0.0.1:8848
          group: SEATA_GROUP # 这个值未生效, 在nacos中依然为DEFAULT_GROUP, 待检查原因
      registry:
        type: nacos
        nacos:
          # seata 在nacos中的服务名
          application: seata-server
          serverAddr: 127.0.0.1:8848
          # 分组需和seate分组一致
          group: SEATA_GROUP

#### 5.1.3 核心代码 ####

@GlobalTransactional 这个注解就是seata提供的事务注解。只需要加上它即可。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 8]

#### 5.2 seata-account-service ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1MjM3NDYzMzU4Mw_size_16_color_FFFFFF_t_70 9]

###### 5.2.1 pom.xml ######

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.4.2</version>
            <relativePath/> 
        </parent>
        <modelVersion>4.0.0</modelVersion>
        <artifactId>seata-account-service2003</artifactId>
        <properties>
            <java.version>1.8</java.version>
            <fastJson-version>1.2.44</fastJson-version>
            <spring-cloud.version>2020.0.2</spring-cloud.version>
            <hutool.version>4.6.1</hutool.version>
            <commons-lang.version>3.7</commons-lang.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-loadbalancer</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <scope>runtime</scope>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
                <exclusions>
                    <exclusion>
                        <groupId>org.junit.vintage</groupId>
                        <artifactId>junit-vintage-engine</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>2021.1</version>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
                <version>2021.1</version>
                <exclusions>
                    
                    <exclusion>
                        <artifactId>seata-all</artifactId>
                        <groupId>io.seata</groupId>
                    </exclusion>
                    
                    <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>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    </project>

5.2.2 配置文件

server:
      port: 2003
    logging:
      level:
        io:
          seata: info
    spring:
      application:
        name: seata-account-service
      datasource:
        url: jdbc:mysql://127.0.0.1:3306/seata_account?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=UTC
        username: root
        password: 123456
        driver-class-name: com.mysql.jdbc.Driver
        type: com.zaxxer.hikari.HikariDataSource
        hikari:
          minimum-idle: 5
          ## 空闲连接存活最大时间，默认600000（10分钟）
          idle-timeout: 600000
          ## 连接池最大连接数，默认是10
          maximum-pool-size: 100
          ## 此属性控制从池返回的连接的默认自动提交行为,默认值：true
          auto-commit: true
          ## 此属性控制池中连接的最长生命周期，值0表示无限生命周期，默认1800000即30分钟
          max-lifetime: 1800000
          ## 数据库连接超时时间,默认30秒，即30000
          connection-timeout: 30000
          connection-test-query: SELECT 1
    
      jpa:
        database: mysql
        generate-ddl: false
        hibernate:
          ddl-auto: none
          naming:
            physical-strategy: org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy
        show-sql: true
        database-platform: org.hibernate.dialect.MySQL55Dialect
        open-in-view: false
    seata:
      enabled: true
      # 该属性需要与前面config.txt文件中的service.vgroupMapping后的值保持一致
      tx-service-group: my_test_tx_group
      config:
        type: nacos
        nacos:
          namespace:
          serverAddr: 127.0.0.1:8848
          group: SEATA_GROUP # 这个值未生效, 在nacos中依然为DEFAULT_GROUP, 待检查原因
      registry:
        type: nacos
        nacos:
          # seata 在nacos中的服务名
          application: seata-server
          serverAddr: 127.0.0.1:8848
          # 分组需和seate分组一致
          group: SEATA_GROUP

###### 5.2.3 核心代码 ######

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[Link 1]: https://seata.io/zh-cn/docs/user/quickstart.html
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[Seata]: https://seata.io/zh-cn/blog/download.html
[Nacos]: https://github.com/alibaba/nacos/releases
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[config.txt]: https://github.com/seata/seata/blob/develop/script/config-center/config.txt
[nacos-config.sh]: https://github.com/seata/seata/blob/develop/script/config-center/nacos/nacos-config.sh
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