滴滴开源DRouter：一款高效的Android路由框架

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开放接口层"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"DRouter在接口层做了大量的精简和优化，在灵活性和易用性方面做了很多权衡，主要目的是减少冗余API，使框架更为简单的使用和接入。比如Request和ServiceLoader作为最核心的API方法数非常少，一些不常用的功能会放到Extend中。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"▍RouterFlow"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https:\/\/static001.geekbang.org\/infoq\/7a\/7a91ea748ffa8d1cfcd5e79a588bee70.webp","alt":"Image","title":null,"style":[{"key":"width","value":"75%"},{"key":"bordertype","value":"none"}],"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"路由数据流从创建Request开始，通过URI在路由表中找出所有的结点，会按照RouterHandler、UI的顺序以及优先级顺序执行。每一个元素都可以定义自己的拦截器，这里的拦截器必须放行以后才能执行对应的结点；同时对于RouterHandler执行完又可以决定是否拦截后面所有的结点。当所有的结点执行完，且异步暂存态也都已释放，最终把结果回传给请求处。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"▍ServiceFlow"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https:\/\/static001.geekbang.org\/infoq\/22\/2285ad89cbb6906329517b0f80aaf66c.png","alt":"Image","title":null,"style":[{"key":"width","value":"75%"},{"key":"bordertype","value":"none"}],"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"ServiceLoader既可以获取Class也可以获取对象实例，核心是路由表和过滤器，其中FeatureMatcher拥有多维过滤的功能。像滴滴这种多业务场景的应用，在使用MVP架构时对P的匹配至少会需要根据所在国家、订单业务线、订单状态三个维度来分别对应唯一的Presenter，多维过滤就很容易解决这个问题。性能方面，对象实例化会根据构造器类型，利用插件生成的RouterProxy代码通过new来实例化无参对象（默认构造）或者反射实例化有参对象（非默认构造）。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"▍RemoteFlow"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https:\/\/static001.geekbang.org\/infoq\/ee\/ee2b73c047f94e9da5798b427fd45e58.webp","alt":"Image","title":null,"style":[{"key":"width","value":"75%"},{"key":"bordertype","value":"none"}],"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"DRouter的跨进程功能是一大特色，左侧绿色代表客户端，自上而下会把所有的参数打包成命令，这里支持任意类型，框架内有一套完整的机制通过遍历集合、转换、组装，最后存储到Parcel里。利用Authority查找到服务端的Provider并随之利用此通道返回服务端的Binder。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"在服务端，也就是右侧的紫色，会自下而上把命令解包和分发。然后利用DRouter的路由RouterHandler和ServiceLoader的功能，使得客户端的命令最终在服务端执行。插件会在服务端生成一段代码，这段代码可以避免使用反射，提高整体的执行效率。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":" "}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"整个过程同步执行，使用简单、高效。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"写在最后"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"DRouter是一套功能完善、定制化程度高的路由框架，具有易于上手、架构清晰、性能优良的特点。现已成为滴滴不可或缺的基础组件之一。DRouter作为组件化方案的践行者，将继续提升各个场景的支持能力，也欢迎各位开发者使用并提出宝贵的反馈意见。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":" "}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"GitHub开源地址："},{"type":"text","text":"https:\/\/github.com\/didi\/DRouter"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"horizontalrule"},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"头图：Unsplash"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"作者：DRouter"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"原文：https:\/\/mp.weixin.qq.com\/s\/c6E7NOKNWbTNYDLZRWAwSw"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"原文：滴滴开源DRouter：一款高效的Android路由框架"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"来源：滴滴技术 - 微信公众号 [ID：didi_tech]"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"转载：著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。"}]}]}