1. 订单/库存/账户业务数据库准备
-
业务说明
- 创建三个微服务。
- 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;最后在订单服务修改订单状态为已完成。
-
创建业务数据库
- seata_order:存储订单的数据库
- seata_storage:存储库存的数据库
- seata_account:存储账户信息的数据库
CREATE DATABASE seata_order; CREATE DATABASE seata_storage; CREATE DATABASE seata_account;
-
建立对应的业务表
- 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; `
- 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;
- 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;
- 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
- 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>
- 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
- 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"
}
}
-
domain
- 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); } }
- 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 }
-
Dao接口及实现
- 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); }
- 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>
-
service接口及实现
- OrderService
public interface OrderService { void create(Order order); }
- AccountService
@FeignClient(value = "seata-account-service") public interface AccountService { @PostMapping("/account/decrease") CommonResult decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money); }
- StorageService
@FeignClient(value = "seata-storage-service") public interface StorageService { @PostMapping("/storage/decrease") CommonResult decrease(@RequestParam("productId") Long productId, @RequestParam("count") Integer count); }
- 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"); } }
-
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");
}
}
-
Config配置
- MyBatisConfig
@Configuration @MapperScan({ "com.whut.springcloud.dao"}) public class MyBatisConfig { }
- 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(); } }
-
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
- pom.xml
- 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
-
file.conf和registry.conf
-
domain
- CommonResult
- 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; }
-
Dao接口及实现
- StorageDao
@Mapper public interface StorageDao { void decrease(@Param("productId") Long productId, @Param("count") Integer count); }
- 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>
-
service接口及实现
- 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); }
- 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"); } }
-
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");
}
}
- Config配置
- 主启动类
3. 建立账户模块
- pom.xml
- 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
-
file.conf和registry.conf
-
domain
- CommonResult
- 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; }
-
Dao接口及实现
- 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); }
- 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>
-
service接口及实现
- AccountService
public interface AccountService { void decrease(@RequestParam("userId") Long userId, @RequestParam("money") BigDecimal money); }
- 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"); } }
-
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");
}
}
- Config配置
- 主启动类