1. 订单/库存/账户业务数据库准备

1. 业务说明

   1. 创建三个微服务。
   2. 当用户下单时，会在订单服务中创建一个订单，然后通过远程调用库存服务来扣减下单商品的库存；再通过远程调用账户服务来扣减用户账户里面的余额；最后在订单服务修改订单状态为已完成。

2. 创建业务数据库

   1. seata_order：存储订单的数据库
   2. seata_storage：存储库存的数据库
   3. seata_account：存储账户信息的数据库

    CREATE DATABASE seata_order;
    CREATE DATABASE seata_storage;
    CREATE DATABASE seata_account;
   

3. 建立对应的业务表

   1. 建立订单表t_order

    CREATE TABLE t_order(
    `id` BIGINT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
    `user_id` BIGINT(11) DEFAULT NULL COMMENT '用户id',
    `product_id` BIGINT(11) DEFAULT NULL COMMENT '产品id',
    `count` INT(11) DEFAULT NULL COMMENT '数量',
    `money` DECIMAL(11,0) DEFAULT NULL COMMENT '金额',
    `status` INT(1) DEFAULT NULL COMMENT '订单状态:0:创建中;1:已完结'
   )ENGINE=INNODB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;  `
   

   2. 建立库存表t_storage

    CREATE TABLE t_storage(
    `id` BIGINT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
    `product_id` BIGINT(11) DEFAULT NULL COMMENT '产品id',
    `total` INT(11) DEFAULT NULL COMMENT '总库存',
    `used` INT(11) DEFAULT NULL COMMENT '已用库存',
    `residue` INT(11) DEFAULT NULL COMMENT '剩余库存'
    )ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
   

   3. 建立账户表t_account

    CREATE TABLE t_account(
      `id` BIGINT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY 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'
    )ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
   

   4. 创建回滚日志表

    CREATE TABLE IF NOT EXISTS `undo_log`
    (
      `branch_id`     BIGINT(20)   NOT NULL COMMENT 'branch transaction id',
      `xid`           VARCHAR(100) NOT NULL COMMENT 'global transaction id',
      `context`       VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization',
      `rollback_info` LONGBLOB     NOT NULL COMMENT 'rollback info',
      `log_status`    INT(11)      NOT NULL COMMENT '0:normal status,1:defense status',
      `log_created`   DATETIME(6)  NOT NULL COMMENT 'create datetime',
      `log_modified`  DATETIME(6)  NOT NULL COMMENT 'modify datetime',
      UNIQUE KEY `ux_undo_log` (`xid`, `branch_id`)
    ) ENGINE = INNODB AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8 COMMENT ='AT transaction mode undo table';
   

2. 订单/库存/账户业务微服务准备

1. 建立订单模块

1. pom.xml

<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>
        <exclusions>
            <exclusion>
                <artifactId>seata-all</artifactId>
                <groupId>io.seata</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>io.seata</groupId>
        <artifactId>seata-all</artifactId>
        <version>1.0.0</version>
    </dependency>
    <!--feign-->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
    </dependency>
    <!--web-actuator-->
    <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>8.0.22</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.1.10</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.0.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
</dependencies>

2. application.yml

• 模块名称seata-order-service
• 数据库seata_order

server:
  port: 2001

spring:
  application:
    name: seata-order-service
  cloud:
    alibaba:
      seata:
        #自定义事务组名称需要与seata-server中的对应
        tx-service-group: my_tx_group
    nacos:
      discovery:
        server-addr: localhost:8848
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://xxx.xxx.xxx.xxx:3306/seata_order?serverTimezone=UTC
    username: root
    password: xxxxxx

feign:
  hystrix:
    enabled: false

logging:
  level:
    io:
      seata: info

mybatis:
  mapperLocations: classpath:mapper/*.xml

3. file.conf和registry.conf
   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_mapping.my_tx_group = "default" #修改自定义事务组名称

  default.grouplist = "127.0.0.1:8091"
  enableDegrade = false
  disable = false
  max.commit.retry.timeout = "-1"
  max.rollback.retry.timeout = "-1"
  disableGlobalTransaction = false
}


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 {
  ## 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 = "dbcp"
    ## mysql/oracle/h2/oceanbase etc.
    db-type = "mysql"
    driver-class-name = "com.mysql.cj.jdbc.Driver"
    url = "jdbc:mysql://192.168.2.9:3306/seata?serverTimezone=UTC"
    user = "root"
    password = "Fangyunfy123."
    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"

  nacos {
    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"
  }
}

4. domain

   1. CommonResult

    @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);
        }
    }
   

   2. Order

    @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
    }
   

5. Dao接口及实现

   1. OrderDao

    @Mapper
    public interface OrderDao {
         
         
   
        //1. 新建订单
        void create(Order order);
   
        //2. 修改订单状态
        void update(@Param("userId") Long userId, @Param("status") Integer status);
    }
   

   2. OrderMapper

    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    <mapper namespace="com.whut.springcloud.dao.OrderDao">
        
        <resultMap id="BaseResultMap" type="com.whut.springcloud.domain.Order">
            <id column="id" property="id" jdbcType="BIGINT"/>
            <result column="user_id" property="userId" jdbcType="BIGINT"/>
            <result column="product_id" property="productId" jdbcType="BIGINT"/>
            <result column="count" property="count" jdbcType="INTEGER"/>
            <result column="money" property="money" jdbcType="DECIMAL"/>
            <result column="status" property="status" jdbcType="INTEGER"/>
        </resultMap>
        
        <insert id="create">
            insert into t_order(id,user_id,product_id,count,money,status)
            values(null ,#{userId}, #{productId}, #{count}, #{money}, 0);
        </insert>
   
        <update id="update">
            update t_order set status = 1 where user_id=#{userId} and status=#{status};
        </update>
    </mapper>
   

6. service接口及实现

   1. OrderService

    public interface OrderService {
         
         
   
        void create(Order order);
    }
   

   2. AccountService

    @FeignClient(value = "seata-account-service")
    public interface AccountService {
         
         
        @PostMapping("/account/decrease")
        CommonResult decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money);
    }
   

   3. StorageService

    @FeignClient(value = "seata-storage-service")
    public interface StorageService {
         
         
   
        @PostMapping("/storage/decrease")
        CommonResult decrease(@RequestParam("productId") Long productId, @RequestParam("count") Integer count);
    }
   

   4. OrderServiceImpl

    @Service
    @Slf4j
    public class OrderServiceImpl implements OrderService {
         
         
   
        @Resource
        private OrderDao orderDao;
        @Resource
        private StorageService storageService;
        @Resource
        private AccountService accountService;
   
        @Override
        @GlobalTransactional(name = "my-create-order",rollbackFor = Exception.class)
        public void create(Order order) {
         
         
            log.info("---------->开始新建订单");
            orderDao.create(order);
   
            log.info("---------->订单微服务调用库存，开始扣减count");
            storageService.decrease(order.getProductId(),order.getCount());
            log.info("---------->订单微服务调用库存，扣减count结束");
            log.info("---------->订单微服务调用账户，开始扣减money");
            accountService.decrease(order.getUserId(),order.getMoney());
            log.info("---------->订单微服务调用账户，扣减money结束");
            //修改订单状态
            log.info("---------->修改订单开始");
            orderDao.update(order.getUserId(), 0);
            log.info("---------->修改订单结束");
   
            log.info("---------->新建订单结束，O(∩_∩)O");
        }
    }
   

7. OrderController

@RestController
public class OrderController {
    
    

    @Resource
    private OrderService orderService;

    @GetMapping("/order/create")
    public CommonResult create(Order order){
    
    
        orderService.create(order);
        return new CommonResult(200,"订单创建完成");
    }
}

8. Config配置

   1. MyBatisConfig

    @Configuration
    @MapperScan({
         
         "com.whut.springcloud.dao"})
    public class MyBatisConfig {
         
         
    }
   

   2. 使用Seata对数据源进行代理，DataSourceProxyConfig

    @Configuration
    public class DataSourceProxyConfig {
         
         
   
      @Value("${mybatis.mapperLocations}")
      private String mapperLocations;
   
      @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.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(mapperLocations));
        sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
        return sqlSessionFactoryBean.getObject();
      }
    }
   

9. 主启动类

@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class SeataOrderMainApp2001 {
    
    
  public static void main(String[] args) {
    
    
    SpringApplication.run(SeataOrderMainApp2001.class,args);
  }
}

2. 建立库存模块

1. pom.xml
2. application.yml

• 模块名称seata-storage-service
• 数据库seata_storage

server:
  port: 2002

spring:
  application:
    name: seata-storage-service
  cloud:
    alibaba:
      seata:
        #自定义事务组名称需要与seata-server中的对应
        tx-service-group: my_tx_group
    nacos:
      discovery:
        server-addr: localhost:8848
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://xxx.xxx.xxx.xxx:3306/seata_storage?serverTimezone=UTC
    username: root
    password: xxxxxxx

feign:
  hystrix:
    enabled: false

logging:
  level:
    io:
      seata: info

mybatis:
  mapperLocations: classpath:mapper/*.xml

3. file.conf和registry.conf

4. domain

   1. CommonResult
   2. Storage

    @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;
    }
   

5. Dao接口及实现

   1. StorageDao

    @Mapper
    public interface StorageDao {
         
         
   
        void decrease(@Param("productId") Long productId, @Param("count") Integer count);
    }
   

   2. StorageMapper

    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    <mapper namespace="com.whut.springcloud.dao.StorageDao">
   
        <resultMap id="BaseResultMap" type="com.whut.springcloud.domain.Storage">
            <id column="id" property="id" jdbcType="BIGINT"/>
            <result column="product_id" property="productId" jdbcType="BIGINT"/>
            <result column="total" property="total" jdbcType="INTEGER"/>
            <result column="used" property="used" jdbcType="INTEGER"/>
            <result column="residue" property="residue" jdbcType="INTEGER"/>
        </resultMap>
   
        <update id="decrease">
            UPDATE t_storage
            SET used = used + #{count}, residue = residue - #{count}
            WHERE product_id = #{productId};
        </update>
    </mapper>
   

6. service接口及实现

   1. StorageService

    public interface StorageService {
         
         
        /**
        * 扣减库存
        * @param productId 库存Id
        * @param count 扣减数量
        */
        void decrease(Long productId, Integer count);
    }
   

   2. StorageServiceImpl

    @Service
    public class StorageServiceImpl implements StorageService {
         
         
   
        private static final Logger LOGGER = LoggerFactory.getLogger(StorageServiceImpl.class);
   
        @Resource
        private StorageDao storageDao;
   
        /**
        * 扣减库存
        * @param productId 库存Id
        * @param count 扣减数量
        */
        @Override
        public void decrease(Long productId, Integer count) {
         
         
            LOGGER.info("------------------->Storage-service扣减库存开始");
            storageDao.decrease(productId,count);
            LOGGER.info("------------------->Storage-service扣减库存结束");
        }
    }
   

7. StorageController

@RestController
public class StorageController {
    
    

    @Autowired
    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");
    }
}

8. Config配置
9. 主启动类

3. 建立账户模块

1. pom.xml
2. application.yml

• 模块名称seata-account-service
• 数据库seata_account

server:
  port: 2003

spring:
  application:
    name: seata-account-service
  cloud:
    alibaba:
      seata:
        #自定义事务组名称需要与seata-server中的对应
        tx-service-group: my_tx_group
    nacos:
      discovery:
        server-addr: localhost:8848
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://192.168.2.9:3306/seata_account?serverTimezone=UTC
    username: root
    password: Fangyunfy123.

feign:
  hystrix:
    enabled: false

logging:
  level:
    io:
      seata: info

mybatis:
  mapperLocations: classpath:mapper/*.xml

3. file.conf和registry.conf

4. domain

   1. CommonResult
   2. Account

    @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;
    }
   

5. Dao接口及实现

   1. AccountDao

    @Mapper
    public interface AccountDao {
         
         
        /**
        * 扣减账户余额
        * @param userId
        * @param money
        */
        void decrease(@Param("userId") Long userId, @Param("money") BigDecimal money);
    }
   

   2. AccountMapper

    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    <mapper namespace="com.whut.springcloud.dao.AccountDao">
   
        <resultMap id="BaseResultMap" type="com.whut.springcloud.domain.Account">
            <id column="id" property="id" jdbcType="BIGINT"/>
            <result column="user_id" property="userId" jdbcType="BIGINT"/>
            <result column="total" property="total" jdbcType="DECIMAL"/>
            <result column="used" property="used" jdbcType="DECIMAL"/>
        </resultMap>
   
        <update id="decrease">
            UPDATE t_account
            SET used = used + #{money}, residue = residue - #{money}
            WHERE user_id = #{userId};
        </update>
    </mapper>
   

6. service接口及实现

   1. AccountService

    public interface AccountService {
         
         
        void decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money);
    }
   

   2. AccountServiceImpl

    @Service
    public class AccountServiceImpl implements AccountService {
         
         
   
        private static final Logger LOGGER = LoggerFactory.getLogger(AccountServiceImpl.class);
   
        @Resource
        private AccountDao accountDao;
   
        /**
        * 扣减余额
        * @param userId 用户Id
        * @param money 扣减数量
        */
        @Override
        public void decrease(Long userId, BigDecimal money) {
         
         
            LOGGER.info("------------------->account-service扣减余额开始");
            //模拟超时异常
            try{
         
         
                TimeUnit.SECONDS.sleep(10);
            }catch (InterruptedException e){
         
         
                e.printStackTrace();
            }
            accountDao.decrease(userId,money);
            LOGGER.info("------------------->account-service扣减余额结束");
        }
    }
   

7. AccountController

@RestController
public class AccountController {
    
    

    @Autowired
    private AccountService accountService;

    @RequestMapping("/account/decrease")
    public CommonResult decrease(Long userId, BigDecimal money){
    
    
        accountService.decrease(userId, money);
        return new CommonResult(200,"扣减余额成功");
    }
}

8. Config配置
9. 主启动类