SpringCloud Aliba-Seata【下】-从入门到学废【8】

目录

1.数据库创建

1.seata_account库下建表

2.seata_order库下建表

3.seata_storage库下建表 

4.在每个库下创建回滚日志 

2.创建订单模块 

2.1建工程

2.2加pom

2.3改yml

2.4file.conf

2.5registry.conf

2.6domain

2.7Dao

2.8Service

2.9controller

2.10config配置

2.11主启动

1.数据库创建

• 这里我们会创建三个服务，一个订单服务，一个库存服务，一个账户服务。
• 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,最后在订单服务中修改订单状态为已完成。

1.seata_account库下建表

CREATE TABLE `t_account` (
  `id` int NOT NULL,
  `user_id` int NOT NULL COMMENT '用户id',
  `total` decimal(20,0) NOT NULL COMMENT '总额度',
  `used` decimal(20,0) NOT NULL COMMENT '已用额度',
  `residue` decimal(20,0) NOT NULL COMMENT '剩余可用额度',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci

2.seata_order库下建表

CREATE TABLE `t_order` (
  `id` int NOT NULL,
  `user_id` int NOT NULL COMMENT '用户id',
  `product_id` int NOT NULL COMMENT '产品id',
  `count` int NOT NULL COMMENT '数量',
  `money` decimal(20,0) NOT NULL COMMENT '金额',
  `status` int NOT NULL COMMENT '订单状态：0-创建中，1-已完结',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci

3.seata_storage库下建表 

CREATE TABLE `t_storage` (
  `id` int NOT NULL,
  `product_id` int NOT NULL COMMENT '产品id',
  `total` int NOT NULL COMMENT '总库存',
  `used` int NOT NULL COMMENT '已用库存',
  `residue` int NOT NULL COMMENT '剩余库存',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci

4.在每个库下创建回滚日志 

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;

2.创建订单模块 

2.1建工程

• 1.在父工程下创建seata-order-service2001
• 2.注意jdk和maven版本

2.2加pom

        <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>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <!--druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.16</version>
        </dependency>
        <!--mysql-connector-java-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!--springCloud alibaba Naocs-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--持久化-->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>
        <!--Sentinel-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
        <!--openFeign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--seata-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>seata-all</groupId>
                    <artifactId>io.seata</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>io.seata</groupId>
            <artifactId>seata-all</artifactId>
            <version>0.9.0</version>
        </dependency>
  

2.3改yml

server:
  port: 2001
spring:
  application:
    name: seata-order-service
  cloud:
    alibaba:
      seata:
        #自定义事务组需要与seat-server中的对应
        tx-service-group: xz_group
    nacos:
      discovery:
        server-addr: 192.168.20.50:1111
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/seata_order
    username: root
    password: 123456

feign:
  sentinel:
    enabled: false

logging:
  level:
    io:
      seata: info

mybatis:
  mapper-locations: classpath:mapper/*.xml

2.4file.conf

在resource下创建文件file.conf，直接粘贴seata的file.conf即可

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.my_test_tx_group = "xz_group"
  #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 {
  ## 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://127.0.0.1:3306/seata?serverTimezone=UTC"
    user = "root"
    password = "123456"
    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
  }
}

2.5registry.conf

在resource下创建文件registryonf，直接粘贴seata的registry.conf即可

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

  nacos {
    serverAddr = "192.168.20.50:1111"
    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"
  }
}

2.6domain

• 1.创建封装类

@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> {
    private Integer code;
    private String message;
    private  T data;
    public CommonResult(Integer code,String message){
        this.code=code;
        this.message=message;
    }
}

• 2.创建实体类 

@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class Order {
    private Integer id;
    private Integer userId;
    private Integer productId;
    private Integer count;
    private BigDecimal money;
    private Integer status;
}

2.7Dao

@Mapper
public interface OrderDao {

    //1.新建订单
    void create(Order order);

    //2.修改订单状态；从0到1
    void update(@Param("userId") Integer userId, @Param("status") Integer status);

}

2.8Service

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Resource
    private OrderDao orderDao;
    @Resource
    private StorageService storageService;
    @Resource
    private AccountService accountService;

    @Override
    @GlobalTransactional(name = "xz_create_order",rollbackFor = Exception.class)
    public void create(Order order) {
        //1.新建订单
        log.info("====开始新建订单====");
        orderDao.create(order);

        //2.扣减库存
        log.info("====订单微服务开始调用库存，扣减count====start");
        storageService.decrease(order.getProductId(),order.getCount());
        log.info("====订单微服务开始调用库存，扣减count====end");

        //3.扣减账户
        log.info("====订单微服务开始调用账户，扣减money====start");
        accountService.decrease(order.getUserId(),order.getMoney());
        log.info("====订单微服务开始调用账户，扣减money====end");

        //4.修改订单状态
        log.info("====开始修改订单状态====start");
        orderDao.update(order.getUserId(),0);
        log.info("====开始修改订单状态====end");

        log.info("====下订单结束====");
    }
}

• 使用openfeign创建AccountService 

@FeignClient(value = "seata-account-service")
public interface AccountService {

    @PostMapping(value = "/storage/decrease")
    CommonResult decrease(@RequestParam("userId")Integer userId,@RequestParam("money") BigDecimal money);
}

• 使用openfeign创建StorageService 

@FeignClient(value = "seata-storage-service")
public interface StorageService {

    @PostMapping(value = "/storage/decrease")
    CommonResult decrease(@RequestParam("productId")Integer productId,@RequestParam("count")Integer count);
}

2.9controller

@RestController
public class OrderController {

    @Resource
    private OrderService orderService;


    @GetMapping("/order/create")
    public CommonResult<Order> create(Order order){
        orderService.create(order);
        return new CommonResult<>(200,"订单创建成功");
    }
}

2.10config配置

@Configuration
public class DataSourceConfig {

    @Value("${mybatis.mapper-locations}")
    private String mapperLocations;

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource dataSource(){
        return new DruidDataSource();
    }

    @Bean
    public DataSourceProxy dataSourceProxy(DataSource dataSource){
      return new DataSourceProxy(dataSource);
    }

    @Bean
    public SqlSessionFactory sqlSessionFactory(DataSourceProxy dataSourceProxy)throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean=new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSourceProxy);
        sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(mapperLocations));
        sqlSessionFactoryBean.setTransactionFactory(new SpringManagedTransactionFactory());
        return sqlSessionFactoryBean.getObject();
    }
}

@Configuration
@MapperScan("com.xz.springcloud.dao")
public class MybatisConfig {
}

2.11主启动

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

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