Wangda Tan created YARN-8046:
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Summary: Revisit RMWebServiceProtocol implementations
Key: YARN-8046
URL: https://issues.apache.org/jira/browse/YARN-8046
Project: Hadoop YARN
Issue Type: Improvement
Reporter: Wangda Tan
I recently found that new changes of RMWebServiceProtocol make adding any new
REST API pretty hard. There're at least 6 classes need to be implemented:
1. {{MockRESTRequestInterceptor}}
2. {{FederationInterceptorREST}}
3. {{DefaultRequestInterceptorREST}}
4. {{PassThroughRESTRequestInterceptor}
5. {{RouterWebServices}}
6. {{RMWebServices}}
Different classes implementations have different styles, simple copy-paste is
not enough. For example.
{{DefaultRequestInterceptorREST}} uses {{RouterWebServiceUtil.genericForward}}
to pass all parameters, which needs to understand how each REST API works,
reconstruct an URL which can easily cause issues.
I think we should revisit these APIs and make sure new API can be easier added
to REST interface like before.
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