KAFKA-5876: Add streamsState() method to StateStoreProvider

[vitojeng]

follow-up #8200

KAFKA-5876's PR break into multiple parts, this PR is part 5.

In KIP-216, the following exceptions is currently not completed: StreamsRebalancingException, StreamsRebalancingException, StateStoreNotAvailableException. In the CompositeReadOnlyXXXXStore class, we need using streams state to decide which exception should be thrown.

This PR add a new method streams() to StateStoreProvider interface. In the next PR, we can get streams state in the CompositeReadOnlyXXXXStore class to determine which exception should be thrown.

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[vitojeng]

@ableegoldman Please take a look :)

[vitojeng]

Hey @ableegoldman, just a remind. Please take a look, when you have time. :)

[ableegoldman]

Just one high-level comment: if all we need this for is the state, then maybe we should just add a method for that instead of exposing the KafkaStreams object directly. Not that it really matters that much, but it's the "safe" thing to do to limit the access to only what's necessary.

Thoughts?

[vitojeng]

Just one high-level comment: if all we need this for is the state, then maybe we should just add a method for that instead of exposing the KafkaStreams object directly. Not that it really matters that much, but it's the "safe" thing to do to limit the access to only what's necessary.

Thoughts?

Agree, thanks for the suggestion.
Will update the PR.

[vitojeng]

update PR & rebase trunk.
Remove:

KafkaStreams streams();

Add

KafkaStreams.State streamsState();

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