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https://issues.apache.org/jira/browse/FLINK-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17073540#comment-17073540
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Andrey Zagrebin commented on FLINK-16876:
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btw, there is already org.apache.flink.runtime.state.ttl.mock.MockStateBackend,
which could be changed to use a custom TtlTimeProvider in
createKeyedStateBackend. The MockStateBackend does not support background
cleanup, only on state access. Then stateBackend have to be settable in
AbstractStreamOperatorTestHarness. This looks like a bit more hassle for me.
> Make TtlTimeProvider configurable when creating keyed state backend
> -------------------------------------------------------------------
>
> Key: FLINK-16876
> URL: https://issues.apache.org/jira/browse/FLINK-16876
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / State Backends
> Affects Versions: 1.10.0
> Reporter: Yun Tang
> Priority: Major
>
> Currently, we would always use TtlTimeProvider.DEFAULT to create keyed state
> backend. This is somehow acceptable since we only support processing time for
> TTL now. However, this would make UT tests which would verify TTL logic not
> so convenient like FLINK-16581.
> I propose to let TtlTimeProvider configurable when creating keyed state
> backend to not block other feature development.
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