NIFI-14230 Implement start/stop flow C2 operations in MiNiFi

[pkedvessy]

Summary

NIFI-14230

Tracking

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Issue Tracking

• [ x ] Apache NiFi Jira issue created

Pull Request Tracking

• [ x ] Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• [ x ] Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

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• [ x ] Pull Request refers to a feature branch with one commit containing changes

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Build

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  • [ x ] JDK 21

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Documentation

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[briansolo1985]

Thank you for your change, @pkedvessy!
The approach looks good to me. I wrote some comments, please check them.

[briansolo1985]

If I remember correctly processGroup.startProcessing() starts the underlying process groups as well, so that seems to be okay. However it seems to be that the remote process groups need to be started/stopped manually, so we probably need to traverse the process groups recursively, and start the remote process groups on each levels

[pkedvessy]

Thanks, nice catch. Recursive start/stop applied and the runStatus "calculation" updated as well with checking nested process groups.

[briansolo1985]

Thanks for incorporating the changes! Looks go to me. +1
Will proceed with the merge once the CI build is done