Erik1288 opened a new pull request #3698: URL: https://github.com/apache/rocketmq/pull/3698
**Make sure set the target branch to `develop`** ## What is the purpose of the change Link #3679 En: As RocketMQ grows, topics will have more traits. Adding a well-designed Attributes sheet can greatly improve TopicConfig's description capabilities. For example, whether the ConsumeQueue type of a Topic is BatchCQ or SimpleCQ, whether the Deletion strategy of a Topic is Delete or Compact, and even the topi-level preservation time are all attributes of a Topic. Adding TopicConfig variables endlessly is obviously not an elegant approach. Ch: 随着RocketMQ的发展，现有的TopicConfig在一定程度上已经没有办法表达清楚一个Topic真实的特质。增加一个设计精良的Attributes属性表可以极大程度提高TopicConfig的描述能力。 比如，一个Topic的ConsumeQueue类型是BatchCQ还是SimpleCQ，一个Topic的Deletion策略是Delete还是Compact，甚至Topic级别的保存时间等，都是属于Topic的一个Attribute，无休止得增加TopicConfig变量显然不是一个优雅的做法。 Follow this checklist to help us incorporate your contribution quickly and easily. Notice, `it would be helpful if you could finish the following 5 checklist(the last one is not necessary)before request the community to review your PR`. - [x] Make sure there is a [Github issue](https://github.com/apache/rocketmq/issues) filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue. - [x] Format the pull request title like `[ISSUE #123] Fix UnknownException when host config not exist`. Each commit in the pull request should have a meaningful subject line and body. - [x] Write a pull request description that is detailed enough to understand what the pull request does, how, and why. - [x] Write necessary unit-test(over 80% coverage) to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in [test module](https://github.com/apache/rocketmq/tree/master/test). - [x] Run `mvn -B clean apache-rat:check findbugs:findbugs checkstyle:checkstyle` to make sure basic checks pass. Run `mvn clean install -DskipITs` to make sure unit-test pass. Run `mvn clean test-compile failsafe:integration-test` to make sure integration-test pass. - [ ] If this contribution is large, please file an [Apache Individual Contributor License Agreement](http://www.apache.org/licenses/#clas). -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
