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Posted to commits@servicecomb.apache.org by GitBox <gi...@apache.org> on 2020/07/14 03:09:33 UTC
[GitHub] [servicecomb-java-chassis] johnyannj opened a new issue #1883: 建议异步编程支持project-reactor
johnyannj opened a new issue #1883:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1883
建议异步编程支持project-reactor
类似webflux。
因为CompletableFuture太难用了~~
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[GitHub] [servicecomb-java-chassis] liubao68 commented on issue #1883: 建议异步编程支持project-reactor
Posted by GitBox <gi...@apache.org>.
liubao68 commented on issue #1883:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1883#issuecomment-738512233
暂时没有这个计划。 CompletableFuture 目前看依然非常好用，只是开发者还没习惯， 而且 JDK 的后续版本异步编程还在持续增强，大部分开发者对异步的诉求也不是很强烈。 java-chassis 保持和 JDK 一致， 暂时不会考虑使用第三方开发接口做异步。
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[GitHub] [servicecomb-java-chassis] wujimin commented on issue #1883: 建议异步编程支持project-reactor
Posted by GitBox <gi...@apache.org>.
wujimin commented on issue #1883:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1883#issuecomment-738515304
可以说一下有哪些地方“太难用”不
我目前知道的有一个点：通过async系列方法切换线程后，后续没指定线程池的then/when调用挂上去的回调，执行线程是不确定的
这个问题我是在java 11里，通过继承CompletableFuture搞定的（在java 8里不太好搞）
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[GitHub] [servicecomb-java-chassis] johnyannj commented on issue #1883: 建议异步编程支持project-reactor
Posted by GitBox <gi...@apache.org>.
johnyannj commented on issue #1883:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1883#issuecomment-740338232
@wujimin
CompletableFuture不是标准的响应式编程规范Reactive-stream-API
stream的API使用很广泛，很容易入门。
CompletableFuture是自搞一套，javadoc也不如project-reactor。而且CompletableFuture不支持lazy启动。
而且project-reactor是Spring官方支持的， 有比CompletableFuture更丰富的第三方支持。
举个例子servicecomb使用的spring的AsyncRestTemplate，spring 5里就废弃了，建议使用project reactor接口的webclient
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[GitHub] [servicecomb-java-chassis] wujimin commented on issue #1883: 建议异步编程支持project-reactor
Posted by GitBox <gi...@apache.org>.
wujimin commented on issue #1883:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1883#issuecomment-740345048
确实lazy是最大的问题，我上面说的执行线程的问题，就跟这个有关
不过，除此之外，jdk的这个CompletableFuture，还是很好用的
我在做的服务项目中，consumer都是使用透明RPC开发模式，不需要像restTemplate/webClient一样，需要记忆url/参数名/参数类型等等信息，不存在不小心写错的可能性
在开发模式上，引入新的类型，应该可以考虑（目前各reactive封装都提供了与CompletableFuture的转换接口）
但是内部扩展点上，目前已经在基于jdk的CompletableFuture全面重构(https://issues.apache.org/jira/browse/SCB-1929#) ，可能不会切换了
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[GitHub] [servicecomb-java-chassis] xhanthow commented on issue #1883: 建议异步编程支持project-reactor
Posted by GitBox <gi...@apache.org>.
xhanthow commented on issue #1883:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1883#issuecomment-738554798
我这个+1是指->异步编程支持`project-reactor`
目前用这个`CompletableFuture`还是没遇到啥问题。
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[GitHub] [servicecomb-java-chassis] xhanthow commented on issue #1883: 建议异步编程支持project-reactor
Posted by GitBox <gi...@apache.org>.
xhanthow commented on issue #1883:
URL: https://github.com/apache/servicecomb-java-chassis/issues/1883#issuecomment-737728963
+1，有这个计划么~
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