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分布式事务–Hmily(feign)「建议收藏」

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原文网址：分布式事务–Hmily(feign)_IT利刃出鞘的博客-CSDN博客

简介

说明

本文使用himily整合springcloud的feign测试TCC分布式事务。所有代码：https://gitee.com/shapeless/demo_SpringCloud/tree/hmily/

官网

文档(springcloud)：SpringCloud用户指南 · dromara(Open source organization)
官网示例：https://github.com/dromara/hmily/tree/master/hmily-demo/hmily-demo-tcc/hmily-demo-tcc-springcloud

业务场景

创建订单时，order微服务先预生成订单（订单状态为创建中），再调用storage的feign来减库存，再调用account的feign来减账户余额，最后将订单状态改为已完成。

技术框架 

所用技术栈：

  • hmily-spring-boot-starter-springcloud:2.1.1
  • springboot:2.3.7.RELEASE
  • springcloud:Hoxton.SR9
  • mysql
  • mybatis-plus-boot-starter:3.4.1
  • eureka
  • gateway

所用插件：

  • lombok

技术细节 

配置方式

  • hmily配置: 各个微服务的resources路径：hmily.yml
  • 业务微服务服务：application.yml

缺陷：

    存在的问题：order微服务只调用storage的feign是正常的，但若在后边加上account的feign，会报空指针异常。

建库建表

创建hmily数据库

创建名为hmily的数据库。

用于hmily框架保存回滚的信息。本处只需创建库即可，在运行时，它会自动创建表结构，创建后的表结构如下：

分布式事务--Hmily(feign)「建议收藏」

创建业务库和表

创建名为business的数据库。

创建业务表：

CREATE TABLE `t_order` (
  `id` bigint(11) NOT NULL AUTO_INCREMENT,
  `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',
  `create_time` datetime(0) NULL DEFAULT NULL,
  `update_time` datetime(0) NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP(0),
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
 
CREATE TABLE `t_account` (
  `id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `user_id` bigint(11) DEFAULT NULL COMMENT '用户id',
  `total` decimal(10,0) DEFAULT NULL COMMENT '总额度',
  `used` decimal(10,0) DEFAULT NULL COMMENT '已用余额',
  `residue` decimal(10,0) DEFAULT '0' COMMENT '剩余可用额度',
  `frozen` decimal(10, 0) NULL DEFAULT NULL COMMENT '冻结金额',
  `create_time` datetime(0) NULL DEFAULT NULL,
  `update_time` datetime(0) NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP(0),
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
 
# INSERT INTO `seat-account`.`account` (`id`, `user_id`, `total`, `used`, `residue`) VALUES ('1', '1', '1000', '0', '100');
INSERT INTO `t_account` (`id`, `user_id`, `total`, `used`, `residue`) VALUES ('1', '1', '1000', '0', '1000');

CREATE TABLE `t_storage` (
  `id` bigint(11) NOT NULL AUTO_INCREMENT,
  `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',
  `frozen` decimal(10, 0) NULL DEFAULT NULL COMMENT '冻结库存',
  `create_time` datetime(0) NULL DEFAULT NULL,
  `update_time` datetime(0) NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP(0),
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
 
# INSERT INTO `seat-storage`.`storage` (`id`, `product_id`, `total`, `used`, `residue`) VALUES ('1', '1', '100', '0', '100');
INSERT INTO `t_storage` (`id`, `product_id`, `total`, `used`, `residue`) VALUES ('1', '1', '100', '0', '100');

业务微服务配置hmily

说明

hmily不需要像seata一样单独起一个服务。

本处只展示order微服务的hmily配置，其他微服务配置类似。只这几项不同：hmily.server.appName, hmily.config.appName, metrics.port

hmily.yml

hmily:
  server:
    configMode: local
    appName: appName_order

  #  如果server.configMode eq local 的时候才会读取到这里的配置信息.
  config:
    appName: appName_order
    repository: mysql

  ribbon:
    rule:
      enabled: true

repository:
  database:
    driverClassName: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/hmily?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT%2B8
    username: root
    password: 222333

metrics:
  metricsName: prometheus
  port: 8801

业务主要代码

order

controller

package com.example.order.controller;

import com.example.order.entity.Order;
import com.example.order.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/order")
public class OrderController {
    @Autowired
    OrderService orderService;

    @PostMapping("createNormal")
    public String createNormal(Order order) {
        orderService.createNormal(order);
        return "success";
    }

    @PostMapping("createFault")
    public String createFault(Order order) {
        orderService.createFault(order);
        return "success";
    }
}

service

Service

package com.example.order.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.example.order.entity.Order;

public interface OrderService extends IService<Order> {
    void createNormal(Order order);

    void createFault(Order order);
}

ServiceImpl

package com.example.order.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.base.feign.AccountFeignClient;
import com.example.base.feign.StorageFeignClient;
import com.example.order.entity.Order;
import com.example.order.mapper.OrderMapper;
import com.example.order.service.OrderService;
import com.example.order.tcc.OrderTccAction;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Slf4j
@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Order> implements OrderService {
    @Autowired
    StorageFeignClient storageFeignClient;

    @Autowired
    AccountFeignClient accountFeignClient;

    @Autowired
    OrderMapper orderMapper;

    @Autowired
    OrderTccAction orderTccAction;

   @Override
   public void createNormal(Order order) {
       log.info("创建订单总业务：开始");

       save(order);

       orderMapper.updateStatus(order.getId(), 1);

       orderTccAction.tryCreateOrderNormal(order.getId(), order.getProductId(), order.getCount(), order.getUserId(), order.getMoney());

       // ResultHolder.setResult(OrderTccAction.class, UUID.randomUUID().toString(), "p");

       log.info("创建订单总业务：结束");
   }

    @Override
    public void createFault(Order order) {
        log.info("创建订单总业务：开始");
        save(order);

        orderMapper.updateStatus(order.getId(), 1);

        // orderTccAction.tryCreateOrderFault(order.getId(), order.getProductId(), order.getCount(), order.getUserId(), order.getMoney());

        log.info("创建订单总业务：结束");
    }

}

mapper

package com.example.order.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.order.entity.Order;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Update;
import org.springframework.stereotype.Repository;

@Repository
public interface OrderMapper extends BaseMapper<Order> {
    @Update("UPDATE `t_order` SET status = #{status} WHERE id = #{id}")
    int updateStatus(@Param("id") Long id, @Param("status") Integer status);
}

storage

controller

package com.example.storage.feign;

import com.example.storage.service.StorageService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class FeignController {
    @Autowired
    StorageService storageService;

    @PostMapping("/feign/storage/tryDecreaseStorage")
    public boolean tryDecreaseStorage(@RequestParam("productId")Long productId,
                                      @RequestParam("count")Integer count) {
        storageService.tryDecreaseStorage(productId, count);
        return true;
    }
}

service

Service 

package com.example.storage.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.example.storage.entity.Storage;

public interface StorageService extends IService<Storage> {
    void tryDecreaseStorage(Long productId, Integer count);
}

ServiceImpl

package com.example.storage.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.storage.entity.Storage;
import com.example.storage.mapper.StorageMapper;
import com.example.storage.service.StorageService;
import lombok.extern.slf4j.Slf4j;
import org.dromara.hmily.annotation.HmilyTCC;
import org.springframework.stereotype.Service;

@Service
@Slf4j
public class StorageServiceImpl extends ServiceImpl<StorageMapper, Storage> implements StorageService {

    @Override
    @HmilyTCC(confirmMethod = "confirmDecreaseStorage", cancelMethod = "cancelDecreaseStorage")
    public void tryDecreaseStorage(Long productId, Integer count) {
        log.info("库存服务：第一阶段开始：检查剩余库存、冻结库存");

        Storage storage = getById(productId);
        if (storage.getResidue() < count) {
            throw new RuntimeException("库存不足。" +
                    "实际库存：" + storage.getResidue() + "，购买数量：" + count);
        }
        getBaseMapper().prepareDecreaseStorage(productId, count);

        //第一阶段成功 添加一个标识。
        //xid也可以通过RootContext.getXid()来获得
        // ResultHolder.setResult(StorageFeignClient.class, RootContext.getXID(), "p");
        // log.info("storage XID:{}", RootContext.getXID());
        log.info("库存服务：第一阶段结束：检查剩余库存、冻结库存");
    }

    public void confirmDecreaseStorage(Long productId, Integer count) {
        log.info("库存服务：第二阶段提交开始：释放冻结的库存、增加已用库存");

        //TODO ResultHolder相关方法
        getBaseMapper().commitDecreaseStorage(productId, count);
        log.info("库存服务：第二阶段提交结束：释放冻结的库存、增加已用库存");
    }

    public void cancelDecreaseStorage(Long productId, Integer count) {
        log.info("库存服务：第二阶段回滚开始：释放冻结的库存、增加回原来剩余库存");
        //TODO ResultHolder相关方法
        getBaseMapper().cancelDecreaseStorage(productId, count);
        log.info("库存服务：第二阶段回滚结束：释放冻结的库存、增加回原来剩余库存");
    }
}

mapper

package com.example.storage.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.storage.entity.Storage;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Update;
import org.springframework.stereotype.Repository;

@Repository
public interface StorageMapper extends BaseMapper<Storage> {
    @Update("UPDATE `t_storage` SET used= used + #{count}, residue = residue - #{count} WHERE product_id = #{productId}")
    int decreaseStorage(@Param("productId") Long productId, @Param("count") Integer count);

    @Update("UPDATE `t_storage` SET frozen = frozen + #{count}, residue = residue - #{count} WHERE product_id = #{productId}")
    void prepareDecreaseStorage(@Param("productId") Long productId, @Param("count") Integer count);

    @Update("UPDATE `t_storage` SET frozen = frozen - #{count}, used = used + #{count} WHERE product_id = #{productId}")
    void commitDecreaseStorage(@Param("productId") Long productId, @Param("count") Integer count);

    @Update("UPDATE `t_storage` SET frozen = frozen - #{count}, residue = residue + #{count} WHERE product_id = #{productId}")
    void cancelDecreaseStorage(@Param("productId") Long productId, @Param("count") Integer count);
}

account

controller

package com.example.account.feign;

import com.example.account.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;

@RestController
public class FeignController {
    @Autowired
    AccountService accountService;

    @PostMapping("/feign/account/tryDecreaseMoney")
    public void tryDecreaseMoney(@RequestParam("userId")Long userId, @RequestParam("money")BigDecimal money) {
        accountService.tryDecreaseMoney(userId, money);
    }

    @PostMapping("/feign/account/tryDecreaseMoneyFault")
    public void tryDecreaseMoneyFault(@RequestParam("userId")Long userId, @RequestParam("money")BigDecimal money) {
        accountService.tryDecreaseMoneyFault(userId, money);
    }
}

service

Service 

package com.example.account.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.example.account.entity.Account;

import java.math.BigDecimal;

public interface AccountService extends IService<Account> {
    void tryDecreaseMoney(Long userId, BigDecimal money);

    void tryDecreaseMoneyFault(Long userId, BigDecimal money);
}

ServiceImpl

package com.example.account.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.account.entity.Account;
import com.example.account.mapper.AccountMapper;
import com.example.account.service.AccountService;
import lombok.extern.slf4j.Slf4j;
import org.dromara.hmily.annotation.HmilyTCC;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;

@Service
@Slf4j
public class AccountServiceImpl extends ServiceImpl<AccountMapper, Account> implements AccountService {
    @Override
    @HmilyTCC(confirmMethod = "confirmDecreaseMoney", cancelMethod = "cancelDecreaseMoney")
    public void tryDecreaseMoney(Long userId, BigDecimal money) {
        log.info("账户服务：第一阶段开始：检查余额、冻结金额");

        Account account = getById(userId);
        if (account.getResidue().compareTo(money) < 0) {
            throw new RuntimeException("余额不足。" +
                    "实际余额：" + account.getResidue() + "，购买金额：" + money);
        }
        getBaseMapper().tryDecreaseMoney(userId, money);
        log.info("账户服务：第一阶段结束：检查余额、冻结金额");
    }

    public void confirmDecreaseMoney(Long userId, BigDecimal money) {
        log.info("账户服务：第二阶段提交开始：释放冻结的金额、增加已用金额");

        getBaseMapper().confirmDecreaseMoney(userId, money);

        log.info("账户服务：第二阶段提交结束：释放冻结的金额、增加已用金额");
    }

    public void cancelDecreaseMoney(Long userId, BigDecimal money) {
        log.info("账户服务：第二阶段回滚开始：释放冻结的金额、增加回原来余额");

        getBaseMapper().cancelDecreaseMoney(userId, money);

        log.info("账户服务：第二阶段回滚结束：释放冻结的金额、增加回原来余额");
    }

    @Override
    @HmilyTCC(confirmMethod = "confirmDecreaseMoneyFault", cancelMethod = "cancelDecreaseMoneyFault")
    public void tryDecreaseMoneyFault(Long userId, BigDecimal money) {
        log.info("账户服务：第一阶段开始：检查余额、冻结金额");

        Account account = getById(userId);
        if (account.getResidue().compareTo(money) < 0) {
            throw new RuntimeException("余额不足。" +
                    "实际余额：" + account.getResidue() + "，购买金额：" + money);
        }
        getBaseMapper().tryDecreaseMoney(userId, money);

        log.info("账户服务：第一阶段结束：检查余额、冻结金额");
    }

    public void confirmDecreaseMoneyFault(Long userId, BigDecimal money) {
        log.info("账户服务：第二阶段提交开始：释放冻结的金额、增加已用金额");

        int i = 1 / 0;
        getBaseMapper().confirmDecreaseMoney(userId, money);

        log.info("账户服务：第二阶段提交结束：释放冻结的金额、增加已用金额");
    }

    public void cancelDecreaseMoneyFault(Long userId, BigDecimal money) {
        log.info("账户服务：第二阶段回滚开始：释放冻结的金额、增加回原来余额");

        int i = 1 / 0;

        getBaseMapper().cancelDecreaseMoney(userId, money);

        log.info("账户服务：第二阶段回滚结束：释放冻结的金额、增加回原来余额");
    }
}

mapper

package com.example.account.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.account.entity.Account;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Update;
import org.springframework.stereotype.Repository;
import org.springframework.web.bind.annotation.RequestParam;

import java.math.BigDecimal;

@Repository
public interface AccountMapper extends BaseMapper<Account> {
    @Update("UPDATE `t_account` SET residue = residue - #{money},used = used + #{money} where user_id = #{userId}")
    int decreaseMoney(@Param("userId")Long userId, @Param("money") BigDecimal money);

    @Update("UPDATE `t_account` SET frozen = frozen + #{money}, residue = residue - #{money} WHERE user_id = #{userId}")
    void tryDecreaseMoney(@Param("userId") Long userId, @Param("money") BigDecimal money);

    @Update("UPDATE `t_account` SET frozen = frozen - #{money}, used = used + #{money} WHERE user_id = #{userId}")
    void confirmDecreaseMoney(@Param("userId") Long userId, @Param("money") BigDecimal money);

    @Update("UPDATE `t_account` SET frozen = frozen - #{money}, residue = residue + #{money} WHERE user_id = #{userId}")
    void cancelDecreaseMoney(@Param("userId") Long userId, @Param("money") BigDecimal money);
}

业务次要代码

base

通用应用注解

package com.example.base.config;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.core.annotation.AliasFor;

import java.lang.annotation.*;

@Inherited
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@MapperScan("com.example.**.mapper")
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients("com.example.base.feign")
public @interface BaseApplication {
    @AliasFor(annotation = SpringBootApplication.class)
    String[] scanBasePackages() default "com.example.**";

//    @AliasFor(annotation = SpringBootApplication.class)
//    Class<?>[] exclude() default {DataSourceAutoConfiguration.class};
}

mybatis-plus 自动填充插件

package com.example.base.config;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.mybatis.spring.annotation.MapperScan;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.time.LocalDateTime;

@Configuration
//@MapperScan("com.example.**.mapper")
public class MyBatisPlusConfig {
    private static final Logger logger = LoggerFactory.getLogger(MyBatisPlusConfig.class);

    //自动填充插件
    @Bean
    public MetaObjectHandler metaObjectHandler() {
        return new MybatisPlusAutoFillConfig();
    }

    public class MybatisPlusAutoFillConfig implements MetaObjectHandler {
        // 新增时填充
        @Override
        public void insertFill(MetaObject metaObject) {
            logger.info("插入：自动填充createTime和updateTime："+ LocalDateTime.now());
            setFieldValByName("createTime", LocalDateTime.now(), metaObject);
            setFieldValByName("updateTime", LocalDateTime.now(), metaObject);
        }

        // 修改时填充
        @Override
        public void updateFill(MetaObject metaObject) {
            logger.info("更新：自动填充updateTime:" + LocalDateTime.now());
            setFieldValByName("updateTime", LocalDateTime.now(), metaObject);
        }
    }
}

feign定义

package com.example.base.feign;

import org.dromara.hmily.annotation.Hmily;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;

@FeignClient("storage")
public interface StorageFeignClient {
    @Hmily
    @PostMapping("/feign/storage/tryDecreaseStorage")
    void tryDecreaseStorage(@RequestParam("productId") Long productId, @RequestParam("count") Integer count);
}

package com.example.base.feign;

import org.dromara.hmily.annotation.Hmily;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.math.BigDecimal;

@FeignClient("account")
public interface AccountFeignClient {
    @Hmily
    @PostMapping("/feign/account/tryDecreaseMoney")
    boolean tryDecreaseMoney(@RequestParam("userId")Long userId, @RequestParam("money")BigDecimal money);

    @Hmily
    @PostMapping("/feign/account/tryDecreaseMoneyFault")
    boolean tryDecreaseMoneyFault(@RequestParam("userId")Long userId, @RequestParam("money")BigDecimal money);
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.7.RELEASE</version>
    </parent>
    <packaging>pom</packaging>
    <groupId>com.example</groupId>
    <artifactId>base</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>base</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <!-- <version>8.0.21</version> 版本Spring-Boot-Parent中已带 -->
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>

        <dependency>
            <groupId>org.dromara</groupId>
            <artifactId>hmily-spring-boot-starter-springcloud</artifactId>
            <version>2.1.1</version>
<!--            <version>2.0.6-RELEASE</version>-->
            <exclusions>
                <exclusion>
                    <groupId>org.dromara</groupId>
                    <artifactId>hmily-repository-mongodb</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <!--  <version>Finchley.RELEASE</version>-->
                <!--  <version>Greenwich.SR3</version>-->
                <version>Hoxton.SR9</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>build-helper-maven-plugin</artifactId>
                <version>1.8</version>
                <executions>
                    <execution>
                        <id>add-source</id>
                        <phase>generate-sources</phase>
                        <goals>
                            <goal>add-source</goal>
                        </goals>
                        <configuration>
                            <sources>
                                <source>src/main/java</source>
                                <source>../base</source>
                                <!--  <source>../base/src/main/java</source>-->
                            </sources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
<!--        <resources>-->
<!--            <resource>-->
<!--                <directory>src/main/resources</directory>-->
<!--                <includes>-->
<!--                    <include>**/*</include>-->
<!--                </includes>-->
<!--                <filtering>false</filtering>-->
<!--            </resource>-->
<!--            <resource>-->
<!--                <directory>../base/src/main/resources</directory>-->
<!--                <includes>-->
<!--                    <include>**/*</include>-->
<!--                </includes>-->
<!--                <filtering>false</filtering>-->
<!--            </resource>-->
<!--        </resources>-->
    </build>

</project>

eureka/gateway

eureka

启动类

package com.example.eurekaserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }

}

application.yml

server:
  port: 7001

spring:
  application:
    name: eureka-server

eureka:
  instance:
    hostname: localhost1
  client:
    register-with-eureka: false
    fetch-registry: false
    serviceUrl:
      defaultZone: http://localhost:7001/eureka/

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
<!--        <version>2.0.6.RELEASE</version>-->
        <version>2.1.12.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>eureka-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka-server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
<!--                <version>Finchley.SR2</version>-->
                <version>Greenwich.SR6</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

gateway

启动类

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class GatewayApplication {

    public static void main(String[] args) {
        SpringApplication.run(GatewayApplication.class, args);
    }

}

application.yml

server:
  port: 6001

spring:
  application:
    name: gateway
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true
          lower-case-service-id: true
      httpclient:
        ssl:
          use-insecure-trust-manager: true

eureka:
  client:
    service-url:
      defaultZone: http://localhost:7001/eureka/

# 配置Gateway日志等级，输出转发细节信息
logging:
  level:
    org.springframework.cloud.gateway: debug

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.12.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR6</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

order/storage/account

说明：order/storage/account的次要代码都是一样的。只是改了唯一性的东西：spring.applicaion.name、端口号、pom.xml的artifactId以及name。

启动类

package com.example.order;

import com.example.base.config.BaseApplication;
import org.springframework.boot.SpringApplication;

@BaseApplication
public class OrderApplication {

    public static void main(String[] args) {
        SpringApplication.run(OrderApplication.class, args);
    }

}

application.yml

server:
  port: 9011

spring:
  application:
    name: order
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/business?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT%2B8
    username: root
    password: 222333

eureka:
  client:
    service-Url:
      defaultZone: http://localhost:7001/eureka
#      defaultZone: http://localhost:7001/eureka,http://localhost:7002/eureka

feign:
  hystrix:
    enabled: false

#Ribbon的负载均衡策略
#ribbon:
#  OkToRetryOnAllOperations: fasle # 对所有操作请求都进行重试  default false
#  MaxAutoRetriesNextServer: 0    # 切换实例的重试次数  default 1
#  MaxAutoRetries: 0     # 对当前实例的重试次数 default 0

mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

#management:
#  metrics:
#    binders:
#      hystrix:
#        enabled: false

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.example</groupId>
        <artifactId>base</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath>../base/pom.xml</relativePath>
    </parent>
    <artifactId>order</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>order</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
    </dependencies>

</project>

测试

测试不报错的接口

访问：http://localhost:6001/order/order/createNormal?userId=1&productId=1&count=10&money=100

测试account服务报错的接口

访问：http://localhost:6001/order/order/createFault?userId=1&productId=1&count=10&money=100

其他网址

分布式事务解决方案之TCC（Hmily）_篮战丶的博客-CSDN博客_tcc分布式事务
Hmily实现TCC事务控制_传智燕青-CSDN博客
Hmily：高性能异步分布式事务TCC框架_架构师的成长之路的博客-CSDN博客

Hmily实现TCC事务 | 码农家园

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