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https://issues.apache.org/jira/browse/FLINK-18430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17144769#comment-17144769
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Aljoscha Krettek commented on FLINK-18430:
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I agree that we should make more interfaces public to benefit from automated
checking, however, {{CheckpointListener}} is in {{package
org.apache.flink.runtime.state}} in the {{flink-runtime}} module. If we want to
make it {{@Public}} we should 1) move it to an API module and 3) move it to an
API package. Moving it next to {{CheckpointedFunction}} would be good, I think.
Side note: {{flink-runtime}} has only three {{@Public}} classes. One of them is
{{SerializableFunction}} which we just introduced for 1.11. We should probably
also move that to an API package/module.
> Upgrade stability to @Public for CheckpointedFunction and CheckpointListener
> ----------------------------------------------------------------------------
>
> Key: FLINK-18430
> URL: https://issues.apache.org/jira/browse/FLINK-18430
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Critical
> Fix For: 1.11.0
>
>
> The two interfaces {{CheckpointedFunction}} and {{CheckpointListener}} are
> used by many users, but are still (for years now) marked as
> {{@PublicEvolving}}.
> I think this is not correct. They are very core to the DataStream API and are
> used widely and should be treated as {{@Public}}.
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