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README
Apache-2.0

说明

  • springrain是spring/springboot的开发范例.基于K8S + apisix/istio 实现云原生微服务.
  • springrain自带代码生成器,能够生成对表的增删改查的逻辑代码.
  • springrain是标准Maven项目,只依赖springboot,没有hibernate,struts,ibatis,数据库调优可以使用druid输出慢sql,比分析xml中的语句更直观,springrain所有的sql语句都使用Finder封装管理,只要查看Finder的引用即可.

前后分离

前后端分离,使用jwt认证,前端项目是front-springrain

微服务

入口项目是springrain-system-web,基于K8S + apisix/istio 实现云原生微服务.

实现了什么?

  • 不增加学习成本,像单体一样开发分布式微服务.
  • 不修改业务代码,可以实现单体,分层,微服务多种部署模式切换.
  • 集成seata分布式事务实现.
  • 子项目module的前后端可以独立运行,也可以被无感知集成,实现前后端按需打包.

实现思路

  • 启动加载springbean时,先检查本地是否有实现,如果没有就启动gRPC远程调用.开发人员无感知.
  • 基于seata分布式事务实现.支持有注解和无注解(开发人员无感知,理论上有不同步风险,个人感觉做好日志,风险不大)混合使用.
  • 基于K8S的Service实现服务注册和发现,ConfigMap实现配置中心.开发人员无感知.
  • 基于apisix/istio实现微服务的发现,监控,熔断,限流.开发人员无感知.

架构设计详细思路:https://www.jiagou.com/post/58-cloud-native-service-mesh

限制

  • 接口和实现的命名强制规范.
  • 一个RPC接口只能有一个实现.
  • 分布式事务,一定要避免A服务update表t,RPC调用B服务,B服务也update表t.这样A等待B结果,B等待A释放锁,造成死锁.
  • 分布式无注解比较方便,理论上有不同步风险,个人感觉做好日志,风险不大
  • Service层不可以使用Servlet API,例如 HttpRequest
  • 建议每个前后端module/子项目,都有各自的前缀,方便nginx根据路径解析
  • 如果module依赖包的特定版本(例如netty,gRPC)和根项目版本冲突,module不能无感知集成,暂时只能独立运行

体验单体到分层切换

  • 修改springrain-system-web依赖springrain-system-service,不再依赖springrain-system-serviceimpl.
  • springrain-system-serviceimpl添加springrain-grpc-server依赖,启用org.springrain.SystemServiceImplApplication的@SpringBootApplication注解
  • 启动seata-server服务端.seata客户端的配置在项目的resources/file.conf里,默认配置是 default.grouplist = "127.0.0.1:8091"
  • 启动springrain-system-serviceimpl
  • 启动springrain-system-web
  • 访问http://127.0.0.1:8080/system/api/checkHealth

文档

https://gitee.com/chunanyong/springrain/tree/master/springrain-system/springrain-system-web/doc

代码生成器

https://gitee.com/chunanyong/springrain/tree/master/springrain-gencode

sql脚本

https://gitee.com/chunanyong/springrain/tree/master/springrain-system/springrain-system-web/sql

测试用例

//就极简而言,一个数据库只需要一个Service,就可以管理这个数据库的任意一张表 
//@Test  查询基本类型
public void testObject() throws Exception{
       // Finder finder=new Finder("select id from t_user where 1=1 ");
        Finder finder=Finder.getSelectFinder(User.class,"id").append(" WHERE 1=1 "); 
         finder.append("and id=:userId ").setParam("userId", "admin");
        String id = baseDemoService.queryForObject(finder, String.class);
        System.out.println(id);

}

//@Test 查询一个对象
public void testObjectUser() throws Exception{
        //Finder finder=new Finder("select * from t_user where id=:userId order by id"); 
Finder finder=Finder.getSelectFinder(User.class).append(" WHERE id=:userId order by id desc "); 
        finder.setParam("userId", "admin");
        User u = baseDemoService.queryForObject(finder, User.class);
        System.out.println(u.getName());

}
//@Test 查询分页
public void testMsSql() throws Exception{
        //Finder finder=new Finder("select * from t_user order by id");
        Finder finder=Finder.getSelectFinder(User.class).append(" order by id desc ");
        List list = baseDemoService.queryForList(finder, User.class, new Page(2));
        System.out.println(list.size());
        for(User s:list){
         System.out.println(s.getName());
         }
}



//@Test 调用数据库存储过程
public void testProc() throws Exception{
        Finder finder=new Finder();
        finder.setParam("unitId", 0);
        finder.setProcName("proc_up");
        Map queryObjectByProc = (Map) baseDemoService.queryObjectByProc(finder);
        System.out.println(queryObjectByProc.get("#update-count-10"));
        

}

//@Test 调用数据库函数
public void testFunction() throws Exception{
        Finder finder=new Finder();
        finder.setFunName("fun_userId");
        finder.setParam("userId", "admin");
        String userName= baseDemoService.queryForObjectByByFunction(finder,String.class);
        System.out.println(userName);
}
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云原生模块化微服务 展开 收起
Java 等 4 种语言
Apache-2.0
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