Till Rohrmann created FLINK-8000:
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Summary: Sort REST handler URLs in RestServerEndpoint
Key: FLINK-8000
URL:
https://issues.apache.org/jira/browse/FLINK-8000 Project: Flink
Issue Type: Improvement
Components: REST
Affects Versions: 1.4.0
Reporter: Till Rohrmann
Assignee: Till Rohrmann
Priority: Minor
In order to make the {{RestServerEndpoint}} more easily extendable, we should automatically sort the returned list of rest handler when calling {{RestServerEndpoint#initializeHandlers}}. That way the order in which the handlers are added to the list is independent of the actual registration order. This is, for example, important for the static file server which always needs to be registered last.
I propose to add a special {{String}} {{Comparator}} which considers the charactor {{':'}} to be the character with the largest value. That way we should get always the following sort order:
- URLs without path parameters have precedence over similar URLs where parts are replaced by path parameters (e.g. {{/jobs/overview}}, {{/jobs/:jobid}} and {{/jobs/:jobid/config}}, {{/jobs/:jobid/vertices/:vertexId}})
- Prefixes are sorted before URLs containing the prefix (e.g. {{/jobs}}, {{/jobs/overview}})
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