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  • Language
    Java
  • License
    Apache License 2.0
  • Created almost 5 years ago
  • Updated 6 months ago

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Repository Details

A Java server-side recording and playback solution based on JVM-Sandbox

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Build Status License GitHub issues

基于JVM-Sandbox的录制/回放通用解决方案

jvm-sandbox-repeaterJVM-Sandbox生态体系下的重要模块,它具备了JVM-Sandbox的所有特点,插件式设计便于快速适配各种中间件,封装请求录制/回放基础协议,也提供了通用可扩展的各种丰富API。

目标人群 - 面向测试开发工程师

  • 线上有个用户请求一直不成功,我想在测试环境Debug一下,能帮我复现一下吗?
  • 压测流量不知道怎么构造,数据结构太复杂,压测模型也难以评估,有什么好的办法吗?
  • 不想写接口测试脚本了,我想做一个流量录制系统,把线上用户场景做业务回归,可能会接入很多服务系统,不想让每个系统都进行改造,有好的框架选择吗?
  • 我想做一个业务监控系统,对线上核心接口采样之后做一些业务校验,实时监控业务正确性。

如果你有以上的想法或需求,jvm-sandbox-repeater 都将是你的不二选择方案;框架基于JVM-Sandbox,拥有JVM-Sandbox的一切特性,同时封装了以下能力:

  • 录制/回放基础协议,可快速配置/编码实现一类中间件的录制/回放
  • 开放数据上报,对于录制结果可上报到自己的服务端,进行监控、回归、问题排查等上层平台搭建

项目简介

repeater的核心能力是什么?

1. 通用录制/回放能力

  • 无侵入式录制HTTP/Java/Dubbo入参/返回值录制能力(业务系统无感知)
  • 基于TTL提供多线程子调用追踪,完整追踪一次请求的调用路径
  • 入口请求(HTTP/Dubbo/Java)流量回放、子调用(Java/Dubbo)返回值Mock能力

2. 快速可扩展API实现

  • 录制/回放插件式架构
  • 提供标准接口,可通过配置/简单编码实现一类通用插件

3. standalone工作模式

  • 无需依赖任何服务端/存储,可以单机工作,提供录制/回放能力

repeater的可以应用到哪些场景?

1. 业务快速回归

  • 基于线上流量的录制/回放,无需人肉准备自动化测试脚本、准备测试数据

2. 线上问题排查

  • 录制回放提供"昨日重现"能力,还原线上真实场景到线下做问题排查和Debug
  • 动态方法入参/返回值录制,提供线上快速问题定位

3. 压测流量准备

  • 0成本录制HTTP/Dubbo等入口流量,作为压测流量模型进行压测

4. 实时业务监控

  • 动态业务监控,基于核心接口数据录制回流到平台,对接口返回数据正确性进行校验和监控

核心原理

流量录制

对于Java调用,一次流量录制包括一次入口调用(entranceInvocation)(eg:HTTP/Dubbo/Java)和若干次子调用(subInvocations)。流量的录制过程就是把入口调用和子调用绑定成一次完整的记录,框架抽象了基础录制协议,调用的组装由调用插件(InvokePlugin)来完成,需要考虑解决的核心问题:

  • 快速开发和适配新插件
  • 绑定入口调用和子调用(解决多线程上下文传递问题)
  • invocation唯一定位,保障回放时精确匹配
  • 自定义流量采样、过滤、发送、存储

框架的核心逻辑录制协议基于JVM-Sandbox的BEFORERETRUNTHROW事件机制进行录制流程控制,详见DefaultEventListener

基于TTL解决跨线程上下文传递问题,开启RepeaterConfig.useTtl之后支持多线程子调用录制

开放插件定义enhance埋点/自定义调用组装方式快速实现插件适配

Invocation抽象Identity统一定位由插件自己扩展实现

基于Tracer实现应用内链路追踪、采样;同时支持多种过滤方式,插件可自由扩展;

public void onEvent(Event event) throws Throwable {
    try {
        /*
         * event过滤;针对单个listener,只处理top的事件
         */
        /** -------- **/
        /*
         * 初始化Tracer开启上下文追踪[基于TTL,支持多线程上下文传递]
         */
        /** -------- **/
        /*
         * 执行基础过滤
         */
        /** -------- **/
        /*
         * 执行采样计算
         */
        /** -------- **/
        /*
         * processor filter
         */
        /** -------- **/
        /*
         * 分发事件处理
         */
    } catch (ProcessControlException pe) {
        /*
         * sandbox流程干预
         */
    } catch (Throwable throwable) {
    	 /*
    	  * 统计异常
    	  */
    } finally {
        /*
         * 清理上下文
         */
    }
}

流量回放

流量回放,获取录制流量的入口调用入参,再次发起调用。注意:读接口或者幂等写接口可以直接回放,否则在生产环境请谨慎使用,可能会造成脏数据;用户可自行选择mock回放或者非mock,回放过程要解决的核心问题:

  • 多种入口(HTTP/Dubbo/Java)的回放发起
  • 自定义回放流量数据来源、回放结果的上报
  • 自定义mock/非mock回放、回放策略
  • 开放回放流程关键节点hook

回放过程通过异步EventBus方式订阅回放请求;基于FlowDispather进行回放流量分发,每个类型回放插件实现RepeaterSPI完成回放请求发起;每次回放请求可决定本地回放是否mock,插件也自由实现mock逻辑,mock流程代码

mock回放:回放流量子调用(eg:mybatis/dubbo)不发生真实调用,从录制子调用中根据 MockStrategy 搜索匹配的子调用,利用JVM-Sandbox的流程干预能力,有匹配结果,进行throwReturnImmediately返回,没有匹配结果则抛出异常阻断流程,避免重复调用污染数据

public void doMock(BeforeEvent event, Boolean entrance, InvokeType type) throws ProcessControlException {
    /*
     * 获取回放上下文
     */
    RepeatContext context = RepeatCache.getRepeatContext(Tracer.getTraceId());
    /*
     * mock执行条件
     */
    if (!skipMock(event, entrance, context) && context != null && context.getMeta().isMock()) {
        try {
            /*
             * 构建mock请求
             */
            final MockRequest request = MockRequest.builder()
                    ...
                    .build();
            /*
             * 执行mock动作
             */
            final MockResponse mr = StrategyProvider.instance().provide(context.getMeta().getStrategyType()).execute(request);
            /*
             * 处理策略推荐结果
             */
            switch (mr.action) {
  					...
            }
        } catch (ProcessControlException pce) {
            throw pce;
        } catch (Throwable throwable) {
            ProcessControlException.throwThrowsImmediately(new RepeatException("unexpected code snippet here.", throwable));
        }
    }
}

合作共建的公司团队

v



已支持的插件列表

Java生态中间件及各种框架众多,各公司技术选型差异较大没办法统一适配,目前适配了几款常用插件作为示例,如有需求可以通过issue方式提交,同时也欢迎大家来贡献开发插件

插件类型 录制 回放 Mock 支持时间 贡献者
http-plugin × 201906 zhaoyb1990
dubbo-plugin × 201906 zhaoyb1990
ibatis-plugin × 201906 zhaoyb1990
mybatis-plugin × 201906 ztbsuper
java-plugin 201906 zhaoyb1990
redis-plugin × 201910 ElesG
hibernate × 201910 zhaoyb1990
spring-data-jpa × 201910 zhaoyb1990

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