SpringCloudAlibaba-分布式事务（Seata）

Seata

https://seata.io/zh-cn/

why

一次业务操作 需要跨多个数据源 或 跨多个系统 进行远程调用，就会产生分布式事务问题；

what

Seata是一款 开源的分布式事务解决方案；

Seata致力于 在微服务架构下 提供高性能和简单易用的 分布式事务服务；

Seata术语

https://seata.io/zh-cn/docs/overview/terminology.html

Seata处理流程

1、TM向TC 申请开启一个全局事务（全局事务创建成功 且 生成一个全局唯一的XID，XID在微服务调用链路的上下文中传播）
2、RM向TC注册分支事务 并将分支事务 纳入 XID对应的全局事务的管辖
3、TM向TC 发起针对XID的全局提交/回滚决议；
4、TC调度XID下全部分支事务 完成提交/回滚；

How

Seata-Server

老版0.9.0

1、下载

https://github.com/seata/seata/releases

2、修改xxx/seata-server-xxx/conf目录下 file.conf

　　修改内容：

　　　　service模块（自定义事务组名称）：

　　　　 

　　　　store模块（事务日志存储模式为db、数据库连接信息）：

　　　　

　　　　

3、新建数据库seata，在seata库中建表

　　建表SQL：xxx/seata-server-xxx/conf目录下的db.store.sql

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drop table if exists `global_table`; create table `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`) );   -- the table to store BranchSession data drop table if exists `branch_table`; create table `branch_table` (   `branch_id` bigint not null,   `xid` varchar(128) not null,   `transaction_id` bigint ,   `resource_group_id` varchar(32),   `resource_id` varchar(256) ,   `lock_key` varchar(128) ,   `branch_type` varchar(8) ,   `status` tinyint,   `client_id` varchar(64),   `application_data` varchar(2000),   `gmt_create` datetime,   `gmt_modified` datetime,   primary key (`branch_id`),   key `idx_xid` (`xid`) );   -- the table to store lock data drop table if exists `lock_table`; create table `lock_table` (   `row_key` varchar(128) not null,   `xid` varchar(96),   `transaction_id` long ,   `branch_id` long,   `resource_id` varchar(256) ,   `table_name` varchar(32) ,   `pk` varchar(36) ,   `gmt_create` datetime ,   `gmt_modified` datetime,   primary key(`row_key`) );

　　

4、修改xxx/seata-server-xxx/conf目录下的 registry.conf

　　

5、启动nacos-server

6、启动seata-server

　　注意：不同的MySQL版本，使用的mysql-connector不同；

新版

https://seata.io/zh-cn/docs/ops/deploy-guide-beginner.html

业务（订单-库存-账户）

业务背景：

　　 创建订单- 减库存 - 减余额 -> 更新订单状态

建库

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create database my_order; create database my_store; create database my_account;

各库建各业务表

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CREATE TABLE `t_order` (   `id` bigint NOT NULL AUTO_INCREMENT,   `user_id` bigint DEFAULT NULL COMMENT '用户id',   `product_id` bigint DEFAULT NULL COMMENT '产品id',   `count` int DEFAULT NULL COMMENT '数量',   `money` decimal(11,0) DEFAULT NULL COMMENT '金额',   `status` int DEFAULT NULL COMMENT '订单状态:  0:创建中 1:已完结',   PRIMARY KEY (`id`) USING BTREE ) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='订单表'     CREATE TABLE `t_storage` (   `id` int NOT NULL AUTO_INCREMENT,   `product_id` int DEFAULT NULL,   `total` int DEFAULT NULL,   `used` int DEFAULT NULL,   `residue` int DEFAULT NULL,   PRIMARY KEY (`id`),   UNIQUE KEY `id_UNIQUE` (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci   INSERT INTO `t_storage` VALUES (1, 1, 100, 0, 100);     CREATE TABLE `t_account` (   `id` bigint NOT NULL COMMENT 'id',   `user_id` bigint 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 NULL COMMENT '剩余可用额度',   PRIMARY KEY (`id`) USING BTREE ) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='账户表'     INSERT INTO `t_account` VALUES (1, 1, 1000, 0, 1000);

　

各库建回滚日志表

　　　xxx/seata-server-xxx/conf目录下的db_undo_log.sql

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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 AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

　　

微服务 

store

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---pom   <dependencies>         <!--nacos-->         <dependency>             <groupId>com.alibaba.cloud</groupId>             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>         </dependency>           <!--seata-->         <dependency>             <groupId>com.alibaba.cloud</groupId>             <artifactId>spring-cloud-starter-alibaba-seata</artifactId>             <version>2.1.0.RELEASE</version>             <exclusions>                 <exclusion>                     <artifactId>seata-all</artifactId>                     <groupId>io.seata</groupId>                 </exclusion>             </exclusions>         </dependency>         <dependency>             <groupId>io.seata</groupId>             <artifactId>seata-all</artifactId>             <version>0.9.0</version>         </dependency>           <!--feign-->         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-openfeign</artifactId>         </dependency>           <!--web-->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-actuator</artifactId>         </dependency>           <!--mysql-druid-->         <dependency>             <groupId>mysql</groupId>             <artifactId>mysql-connector-java</artifactId>             <version>8.0.27</version>         </dependency>         <dependency>             <groupId>com.alibaba</groupId>             <artifactId>druid-spring-boot-starter</artifactId>             <version>1.1.10</version>         </dependency>           <!--        mybatis-->         <dependency>             <groupId>org.mybatis.spring.boot</groupId>             <artifactId>mybatis-spring-boot-starter</artifactId>             <version>2.0.0</version>         </dependency>           <!--        lombok-->         <dependency>             <groupId>org.projectlombok</groupId>             <artifactId>lombok</artifactId>             <optional>true</optional>         </dependency>     </dependencies>   ---yml   server:   port: 2002   spring:   application:     name: seata-storage   cloud:     alibaba:       seata:         tx-service-group: apy_test_tx_group #自定义事务组名称需要与seata-server中的对应     nacos:       discovery:         server-addr: localhost:8848   datasource:     type: com.alibaba.druid.pool.DruidDataSource     driver-class-name: com.mysql.cj.jdbc.Driver     url: jdbc:mysql://localhost:3306/my_store?useUnicode=true&characterEncoding=utf-8&useSSL=false     username: root     password: an314159   feign:   hystrix:     enabled: false   logging:   level:     io:       seata: info     ---file.conf transport {   # tcp udt unix-domain-socket   type = "TCP"   #NIO NATIVE   server = "NIO"   #enable heartbeat   heartbeat = true   #thread factory for netty   thread-factory {     boss-thread-prefix = "NettyBoss"     worker-thread-prefix = "NettyServerNIOWorker"     server-executor-thread-prefix = "NettyServerBizHandler"     share-boss-worker = false     client-selector-thread-prefix = "NettyClientSelector"     client-selector-thread-size = 1     client-worker-thread-prefix = "NettyClientWorkerThread"     # netty boss thread size,will not be used for UDT     boss-thread-size = 1     #auto default pin or 8     worker-thread-size = 8   }   shutdown {     # when destroy server, wait seconds     wait = 3   }   serialization = "seata"   compressor = "none" } service {   #vgroup->rgroup   vgroup_mapping.apy_test_tx_group = "default"  #1、修改自定义事务组名称   #only support single node   default.grouplist = "127.0.0.1:8091"   #degrade current not support   enableDegrade = false   #disable   disable = false   #unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanent   max.commit.retry.timeout = "-1"   max.rollback.retry.timeout = "-1" }   client {   async.commit.buffer.limit = 10000   lock {     retry.internal = 10     retry.times = 30   }   report.retry.count = 5   tm.commit.retry.count = 1   tm.rollback.retry.count = 1 }   ## transaction log store store {                                     #2、修改事务log存储   ## store mode: file、db   mode = "db"     ## file store   file {     dir = "sessionStore"       # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions     max-branch-session-size = 16384     # globe session size , if exceeded throws exceptions     max-global-session-size = 512     # file buffer size , if exceeded allocate new buffer     file-write-buffer-cache-size = 16384     # when recover batch read size     session.reload.read_size = 100     # async, sync     flush-disk-mode = async   }     ## database store   db {     ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.     datasource = "druid"     ## mysql/oracle/h2/oceanbase etc.     db-type = "mysql"     driver-class-name = "com.mysql.cj.jdbc.Driver"     url = "jdbc:mysql://127.0.0.1:3306/seata"     user = "root"     password = "an314159"     min-conn = 1     max-conn = 3     global.table = "global_table"     branch.table = "branch_table"     lock-table = "lock_table"     query-limit = 100   } } lock {   ## the lock store mode: local、remote   mode = "remote"     local {     ## store locks in user's database   }     remote {     ## store locks in the seata's server   } } recovery {   #schedule committing retry period in milliseconds   committing-retry-period = 1000   #schedule asyn committing retry period in milliseconds   asyn-committing-retry-period = 1000   #schedule rollbacking retry period in milliseconds   rollbacking-retry-period = 1000   #schedule timeout retry period in milliseconds   timeout-retry-period = 1000 }   transaction {   undo.data.validation = true   undo.log.serialization = "jackson"   undo.log.save.days = 7   #schedule delete expired undo_log in milliseconds   undo.log.delete.period = 86400000   undo.log.table = "undo_log" }   ## metrics settings metrics {   enabled = false   registry-type = "compact"   # multi exporters use comma divided   exporter-list = "prometheus"   exporter-prometheus-port = 9898 }   support {   ## spring   spring {     # auto proxy the DataSource bean     datasource.autoproxy = false   } }       ---registry.conf registry {   # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa   type = "nacos"                        #1、注册type修改     nacos {                               #2、注册对应的type内容修改     serverAddr = "localhost:8848"     namespace = ""     cluster = "default"   }   eureka {     serviceUrl = "http://localhost:8761/eureka"     application = "default"     weight = "1"   }   redis {     serverAddr = "localhost:6379"     db = "0"   }   zk {     cluster = "default"     serverAddr = "127.0.0.1:2181"     session.timeout = 6000     connect.timeout = 2000   }   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 = "file"     nacos {     serverAddr = "localhost"     namespace = ""   }   consul {     serverAddr = "127.0.0.1:8500"   }   apollo {     app.id = "seata-server"     apollo.meta = "http://192.168.1.204:8801"   }   zk {     serverAddr = "127.0.0.1:2181"     session.timeout = 6000     connect.timeout = 2000   }   etcd3 {     serverAddr = "http://localhost:2379"   }   file {     name = "file.conf"   } }       ---config @Configuration public class DataSourceProxyConfig {       @Bean     @ConfigurationProperties(prefix = "spring.datasource")     public DataSource druidDataSource() {         return new DruidDataSource();     }       @Bean     public DataSourceProxy dataSourceProxy(DataSource dataSource) {         return new DataSourceProxy(dataSource);     }       @Bean     public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception {         SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();         sqlSessionFactoryBean.setDataSource(dataSourceProxy);         sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());         return sqlSessionFactoryBean.getObject();     }   }     @Configuration @MapperScan({"com.an.mapper"}) public class MyBatisConfig { }     ---common @Data public class Storage {       private Long id;       /**      * 产品id      */     private Long productId;       /**      * 总库存      */     private Integer total;       /**      * 已用库存      */     private Integer used;       /**      * 剩余库存      */     private Integer residue; }     @Data @AllArgsConstructor @NoArgsConstructor public class CommonResult<T> {     private Integer code;     private String message;     private T data;       public CommonResult(Integer code, String message) {         this(code, message, null);     } }     ---mapper @Mapper public interface StorageMapper {       @Update("UPDATE t_storage SET used = used + #{count},residue = residue - #{count} WHERE product_id = #{productId}")     void decrease(@Param("productId") Long productId, @Param("count") Integer count);   }       ---service public interface StorageService {       void decrease(Long productId, Integer count);   }     @Service public class StorageServiceImpl implements StorageService {       @Resource     private StorageMapper storageDao;       @Override     public void decrease(Long productId, Integer count) {         storageDao.decrease(productId, count);     } }     ---controller @RestController public class StorageController {       @Resource     private StorageService storageService;       @RequestMapping("/storage/decrease")     public CommonResult decrease(Long productId, Integer count) {         storageService.decrease(productId, count);         return new CommonResult(200, "扣减库存成功！");     } }     ---starter @EnableDiscoveryClient @EnableFeignClients @SpringBootApplication(exclude = DataSourceAutoConfiguration.class) public class StorageStarter2002 {       public static void main(String[] args) {         SpringApplication.run(StorageStarter2002.class, args);     } }

　　

　　

account

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---pom <dependencies>         <!--nacos-->         <dependency>             <groupId>com.alibaba.cloud</groupId>             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>         </dependency>           <!--seata-->         <dependency>             <groupId>com.alibaba.cloud</groupId>             <artifactId>spring-cloud-starter-alibaba-seata</artifactId>             <version>2.1.0.RELEASE</version>             <exclusions>                 <exclusion>                     <artifactId>seata-all</artifactId>                     <groupId>io.seata</groupId>                 </exclusion>             </exclusions>         </dependency>         <dependency>             <groupId>io.seata</groupId>             <artifactId>seata-all</artifactId>             <version>0.9.0</version>         </dependency>           <!--feign-->         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-openfeign</artifactId>         </dependency>           <!--web-->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-actuator</artifactId>         </dependency>           <!--mysql-druid-->         <dependency>             <groupId>mysql</groupId>             <artifactId>mysql-connector-java</artifactId>             <version>8.0.27</version>         </dependency>         <dependency>             <groupId>com.alibaba</groupId>             <artifactId>druid-spring-boot-starter</artifactId>             <version>1.1.10</version>         </dependency>           <!--        mybatis-->         <dependency>             <groupId>org.mybatis.spring.boot</groupId>             <artifactId>mybatis-spring-boot-starter</artifactId>             <version>2.0.0</version>         </dependency>           <!--        lombok-->         <dependency>             <groupId>org.projectlombok</groupId>             <artifactId>lombok</artifactId>             <optional>true</optional>         </dependency>     </dependencies>     ---yml server:   port: 2003   spring:   application:     name: seata-account   cloud:     alibaba:       seata:         tx-service-group: apy_test_tx_group #自定义事务组名称需要与seata-server中的对应     nacos:       discovery:         server-addr: localhost:8848   datasource:     type: com.alibaba.druid.pool.DruidDataSource     driver-class-name: com.mysql.cj.jdbc.Driver     url: jdbc:mysql://localhost:3306/my_account?useUnicode=true&characterEncoding=utf-8&useSSL=false     username: root     password: an314159   feign:   hystrix:     enabled: false   logging:   level:     io:       seata: info     ---file.conf transport {   # tcp udt unix-domain-socket   type = "TCP"   #NIO NATIVE   server = "NIO"   #enable heartbeat   heartbeat = true   #thread factory for netty   thread-factory {     boss-thread-prefix = "NettyBoss"     worker-thread-prefix = "NettyServerNIOWorker"     server-executor-thread-prefix = "NettyServerBizHandler"     share-boss-worker = false     client-selector-thread-prefix = "NettyClientSelector"     client-selector-thread-size = 1     client-worker-thread-prefix = "NettyClientWorkerThread"     # netty boss thread size,will not be used for UDT     boss-thread-size = 1     #auto default pin or 8     worker-thread-size = 8   }   shutdown {     # when destroy server, wait seconds     wait = 3   }   serialization = "seata"   compressor = "none" } service {   #vgroup->rgroup   vgroup_mapping.apy_test_tx_group = "default"  #1、修改自定义事务组名称(v.m.x x与seata-sever的group值一致)   #only support single node   default.grouplist = "127.0.0.1:8091"   #degrade current not support   enableDegrade = false   #disable   disable = false   #unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanent   max.commit.retry.timeout = "-1"   max.rollback.retry.timeout = "-1" }   client {   async.commit.buffer.limit = 10000   lock {     retry.internal = 10     retry.times = 30   }   report.retry.count = 5   tm.commit.retry.count = 1   tm.rollback.retry.count = 1 }   ## transaction log store store {                                     #2、修改事务log存储   ## store mode: file、db   mode = "db"     ## file store   file {     dir = "sessionStore"       # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions     max-branch-session-size = 16384     # globe session size , if exceeded throws exceptions     max-global-session-size = 512     # file buffer size , if exceeded allocate new buffer     file-write-buffer-cache-size = 16384     # when recover batch read size     session.reload.read_size = 100     # async, sync     flush-disk-mode = async   }     ## database store   db {     ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.     datasource = "druid"     ## mysql/oracle/h2/oceanbase etc.     db-type = "mysql"     driver-class-name = "com.mysql.cj.jdbc.Driver"     url = "jdbc:mysql://127.0.0.1:3306/seata"     user = "root"     password = "an314159"     min-conn = 1     max-conn = 3     global.table = "global_table"     branch.table = "branch_table"     lock-table = "lock_table"     query-limit = 100   } } lock {   ## the lock store mode: local、remote   mode = "remote"     local {     ## store locks in user's database   }     remote {     ## store locks in the seata's server   } } recovery {   #schedule committing retry period in milliseconds   committing-retry-period = 1000   #schedule asyn committing retry period in milliseconds   asyn-committing-retry-period = 1000   #schedule rollbacking retry period in milliseconds   rollbacking-retry-period = 1000   #schedule timeout retry period in milliseconds   timeout-retry-period = 1000 }   transaction {   undo.data.validation = true   undo.log.serialization = "jackson"   undo.log.save.days = 7   #schedule delete expired undo_log in milliseconds   undo.log.delete.period = 86400000   undo.log.table = "undo_log" }   ## metrics settings metrics {   enabled = false   registry-type = "compact"   # multi exporters use comma divided   exporter-list = "prometheus"   exporter-prometheus-port = 9898 }   support {   ## spring   spring {     # auto proxy the DataSource bean     datasource.autoproxy = false   } }     ---registry.conf registry {   # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa   type = "nacos"                        #1、注册type修改     nacos {                               #2、注册对应的type内容修改     serverAddr = "localhost:8848"     namespace = ""     cluster = "default"   }   eureka {     serviceUrl = "http://localhost:8761/eureka"     application = "default"     weight = "1"   }   redis {     serverAddr = "localhost:6379"     db = "0"   }   zk {     cluster = "default"     serverAddr = "127.0.0.1:2181"     session.timeout = 6000     connect.timeout = 2000   }   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 = "file"     nacos {     serverAddr = "localhost"     namespace = ""   }   consul {     serverAddr = "127.0.0.1:8500"   }   apollo {     app.id = "seata-server"     apollo.meta = "http://192.168.1.204:8801"   }   zk {     serverAddr = "127.0.0.1:2181"     session.timeout = 6000     connect.timeout = 2000   }   etcd3 {     serverAddr = "http://localhost:2379"   }   file {     name = "file.conf"   } }     ---config @Configuration public class DataSourceProxyConfig {       @Bean     @ConfigurationProperties(prefix = "spring.datasource")     public DataSource druidDataSource() {         return new DruidDataSource();     }       @Bean     public DataSourceProxy dataSourceProxy(DataSource dataSource) {         return new DataSourceProxy(dataSource);     }       @Bean     public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception {         SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();         sqlSessionFactoryBean.setDataSource(dataSourceProxy);         sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());         return sqlSessionFactoryBean.getObject();     }   }     @Configuration @MapperScan({"com.an.mapper"}) public class MyBatisConfig { }     ---common @Data @AllArgsConstructor @NoArgsConstructor public class Account {       private Long id;       /**      * 用户id      */     private Long userId;       /**      * 总额度      */     private BigDecimal total;       /**      * 已用额度      */     private BigDecimal used;       /**      * 剩余额度      */     private BigDecimal residue; }     @Data @AllArgsConstructor @NoArgsConstructor public class CommonResult<T> {     private Integer code;     private String message;     private T data;       public CommonResult(Integer code, String message) {         this(code, message, null);     } }     ---mapper @Mapper public interface AccountMapper {       @Update("UPDATE t_account SET residue = residue - #{money},used = used + #{money} WHERE user_id = #{userId}")     void decrease(@Param("userId") Long userId, @Param("money") BigDecimal money); }     ---service public interface AccountService {     void decrease(Long userId, BigDecimal money); }   @Service public class AccountServiceImpl implements AccountService {         @Resource     AccountMapper accountDao;       /**      * 扣减账户余额      */     @Override     public void decrease(Long userId, BigDecimal money) {         //模拟超时异常，全局事务回滚 //        try { //            TimeUnit.SECONDS.sleep(20); //        } catch (InterruptedException e) { //            e.printStackTrace(); //        }         accountDao.decrease(userId, money);     } }     ---controller @RestController public class AccountController {       @Resource     AccountService accountService;       /**      * 扣减账户余额      */     @RequestMapping("/account/decrease")     public CommonResult decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money) {         accountService.decrease(userId, money);         return new CommonResult(200, "扣减账户余额成功！");     } }     ---starter @EnableDiscoveryClient @EnableFeignClients @SpringBootApplication(exclude = DataSourceAutoConfiguration.class) public class AccountStarter2003 {       public static void main(String[] args) {         SpringApplication.run(AccountStarter2003.class, args);     } }

　　

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---pom <dependencies>         <!--nacos-->         <dependency>             <groupId>com.alibaba.cloud</groupId>             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>         </dependency>           <!--seata-->         <dependency>             <groupId>com.alibaba.cloud</groupId>             <artifactId>spring-cloud-starter-alibaba-seata</artifactId>             <version>2.1.0.RELEASE</version>             <exclusions>                 <exclusion>                     <artifactId>seata-all</artifactId>                     <groupId>io.seata</groupId>                 </exclusion>             </exclusions>         </dependency>         <dependency>             <groupId>io.seata</groupId>             <artifactId>seata-all</artifactId>             <version>0.9.0</version>         </dependency>           <!--feign-->         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-openfeign</artifactId>         </dependency>           <!--web-->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-actuator</artifactId>         </dependency>           <!--mysql-druid-->         <dependency>             <groupId>mysql</groupId>             <artifactId>mysql-connector-java</artifactId>             <version>8.0.27</version>         </dependency>         <dependency>             <groupId>com.alibaba</groupId>             <artifactId>druid-spring-boot-starter</artifactId>             <version>1.1.10</version>         </dependency>   <!--        mybatis-->         <dependency>             <groupId>org.mybatis.spring.boot</groupId>             <artifactId>mybatis-spring-boot-starter</artifactId>             <version>2.0.0</version>         </dependency>   <!--        lombok-->         <dependency>             <groupId>org.projectlombok</groupId>             <artifactId>lombok</artifactId>             <optional>true</optional>         </dependency>     </dependencies>     ---yml server:   port: 2001   spring:   application:     name: seata-order   cloud:     alibaba:       seata:         tx-service-group: apy_test_tx_group #自定义事务组名称需要与seata-server中的对应     nacos:       discovery:         server-addr: localhost:8848   datasource:     type: com.alibaba.druid.pool.DruidDataSource     driver-class-name: com.mysql.cj.jdbc.Driver     url: jdbc:mysql://localhost:3306/my_order?useUnicode=true&characterEncoding=utf-8&useSSL=false     username: root     password: an314159     main:     allow-bean-definition-overriding: true     feign:   hystrix:     enabled: false   logging:   level:     io:       seata: info     ---file.conf transport {   # tcp udt unix-domain-socket   type = "TCP"   #NIO NATIVE   server = "NIO"   #enable heartbeat   heartbeat = true   #thread factory for netty   thread-factory {     boss-thread-prefix = "NettyBoss"     worker-thread-prefix = "NettyServerNIOWorker"     server-executor-thread-prefix = "NettyServerBizHandler"     share-boss-worker = false     client-selector-thread-prefix = "NettyClientSelector"     client-selector-thread-size = 1     client-worker-thread-prefix = "NettyClientWorkerThread"     # netty boss thread size,will not be used for UDT     boss-thread-size = 1     #auto default pin or 8     worker-thread-size = 8   }   shutdown {     # when destroy server, wait seconds     wait = 3   }   serialization = "seata"   compressor = "none" } service {   #vgroup->rgroup   vgroup_mapping.apy_test_tx_group = "default"  #1、修改自定义事务组名称   #only support single node   default.grouplist = "127.0.0.1:8091"   #degrade current not support   enableDegrade = false   #disable   disable = false   #unit ms,s,m,h,d represents milliseconds, seconds, minutes, hours, days, default permanent   max.commit.retry.timeout = "-1"   max.rollback.retry.timeout = "-1" }   client {   async.commit.buffer.limit = 10000   lock {     retry.internal = 10     retry.times = 30   }   report.retry.count = 5   tm.commit.retry.count = 1   tm.rollback.retry.count = 1 }   ## transaction log store store {                                     #2、修改事务log存储   ## store mode: file、db   mode = "db"     ## file store   file {     dir = "sessionStore"       # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions     max-branch-session-size = 16384     # globe session size , if exceeded throws exceptions     max-global-session-size = 512     # file buffer size , if exceeded allocate new buffer     file-write-buffer-cache-size = 16384     # when recover batch read size     session.reload.read_size = 100     # async, sync     flush-disk-mode = async   }     ## database store   db {     ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp) etc.     datasource = "druid"     ## mysql/oracle/h2/oceanbase etc.     db-type = "mysql"     driver-class-name = "com.mysql.cj.jdbc.Driver"     url = "jdbc:mysql://127.0.0.1:3306/seata"     user = "root"     password = "an314159"     min-conn = 1     max-conn = 3     global.table = "global_table"     branch.table = "branch_table"     lock-table = "lock_table"     query-limit = 100   } } lock {   ## the lock store mode: local、remote   mode = "remote"     local {     ## store locks in user's database   }     remote {     ## store locks in the seata's server   } } recovery {   #schedule committing retry period in milliseconds   committing-retry-period = 1000   #schedule asyn committing retry period in milliseconds   asyn-committing-retry-period = 1000   #schedule rollbacking retry period in milliseconds   rollbacking-retry-period = 1000   #schedule timeout retry period in milliseconds   timeout-retry-period = 1000 }   transaction {   undo.data.validation = true   undo.log.serialization = "jackson"   undo.log.save.days = 7   #schedule delete expired undo_log in milliseconds   undo.log.delete.period = 86400000   undo.log.table = "undo_log" }   ## metrics settings metrics {   enabled = false   registry-type = "compact"   # multi exporters use comma divided   exporter-list = "prometheus"   exporter-prometheus-port = 9898 }   support {   ## spring   spring {     # auto proxy the DataSource bean     datasource.autoproxy = false   } }     ---registry.conf registry {   # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa   type = "nacos"                        #1、注册type修改     nacos {                               #2、注册对应的type内容修改     serverAddr = "localhost:8848"     namespace = ""     cluster = "default"   }   eureka {     serviceUrl = "http://localhost:8761/eureka"     application = "default"     weight = "1"   }   redis {     serverAddr = "localhost:6379"     db = "0"   }   zk {     cluster = "default"     serverAddr = "127.0.0.1:2181"     session.timeout = 6000     connect.timeout = 2000   }   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 = "file"     nacos {     serverAddr = "localhost"     namespace = ""   }   consul {     serverAddr = "127.0.0.1:8500"   }   apollo {     app.id = "seata-server"     apollo.meta = "http://192.168.1.204:8801"   }   zk {     serverAddr = "127.0.0.1:2181"     session.timeout = 6000     connect.timeout = 2000   }   etcd3 {     serverAddr = "http://localhost:2379"   }   file {     name = "file.conf"   } }       ---config @Configuration public class DataSourceProxyConfig {       @Bean     @ConfigurationProperties(prefix = "spring.datasource")     public DataSource druidDataSource() {         return new DruidDataSource();     }       @Bean     public DataSourceProxy dataSourceProxy(DataSource dataSource) {         return new DataSourceProxy(dataSource);     }       @Bean     public SqlSessionFactory sqlSessionFactoryBean(DataSourceProxy dataSourceProxy) throws Exception {         SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();         sqlSessionFactoryBean.setDataSource(dataSourceProxy);         sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());         return sqlSessionFactoryBean.getObject();     }   }     @Configuration @MapperScan({"com.an.mapper"}) public class MyBatisConfig { }     ---common @Data @AllArgsConstructor @NoArgsConstructor public class CommonResult<T> {     private Integer code;     private String message;     private T data;       public CommonResult(Integer code, String message) {         this(code, message, null);     } }     @Data @AllArgsConstructor @NoArgsConstructor public class Order {     private Long id;       private Long userId;       private Long productId;       private Integer count;       private BigDecimal money;       private Integer status; //订单状态：0：创建中；1：已完结 }     ---mapper @Mapper public interface OrderMapper {       //1 新建订单     @Insert("insert into t_order(user_id, product_id, count, money, status) value (#{userId},#{productId},#{count},#{money},0)")     void create(Order order);       //2 修改订单状态，从零改为1     @Update("update t_order set status = 1 where user_id = #{userId} and status = #{status}")     void update(@Param("userId") Long userId, @Param("status") Integer status);   }     ---service @FeignClient(value = "seata-account") public interface AccountService {       @PostMapping(value = "/account/decrease")     CommonResult decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money);   }   @FeignClient(value = "seata-storage") public interface StorageService {       @PostMapping(value = "/storage/decrease")     CommonResult decrease(@RequestParam("productId") Long productId, @RequestParam("count") Integer count);   }   public interface OrderService {       void create(Order order);   }   @Service @Slf4j public class OrderServiceImpl implements OrderService {     @Resource     private OrderMapper orderDao;     @Resource     private StorageService storageService;     @Resource     private AccountService accountService;         @Override     @GlobalTransactional(name = "apy_test_tx_group", rollbackFor = Exception.class)     public void create(Order order) {         //1 新建订单         orderDao.create(order);         //2 扣减库存         storageService.decrease(order.getProductId(), order.getCount());         //3 扣减账户         accountService.decrease(order.getUserId(), order.getMoney());         //4 修改订单状态，从零到1,1代表已经完成         orderDao.update(order.getUserId(), 0);     } }     ---controller @RestController public class OrderController {     @Resource     private OrderService orderService;         @GetMapping("/order/create")     public CommonResult create(Order order) {         orderService.create(order);         return new CommonResult(200, "订单创建成功");     } }     ---starter @EnableDiscoveryClient @EnableFeignClients @SpringBootApplication(exclude = DataSourceAutoConfiguration.class) public class OrderStarter2001 {       public static void main(String[] args) {         SpringApplication.run(OrderStarter2001.class, args);     } }

　　

测试：http://localhost:2001/order/create?userId=1&productId=1&count=1&money=1

 

源码编译问题 

1、io.seata.codec.protobuf.generated报错

　　下载插件protobuf support

　　执行maven 的 seata指定模块 的plugins 的protobuf的protobuf:compile

　　seata指定模块的target的generated-sources的protobuf的Java目录改为Rsource Root