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https://issues.apache.org/jira/browse/FLINK-19493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17207878#comment-17207878
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Aljoscha Krettek commented on FLINK-19493:
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Yes, I'm planning to add tests for the existing behaviour and new ones if
necessary.
> In CliFrontend, make flow of Configuration more obvious
> -------------------------------------------------------
>
> Key: FLINK-19493
> URL: https://issues.apache.org/jira/browse/FLINK-19493
> Project: Flink
> Issue Type: Improvement
> Components: Command Line Client
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Priority: Major
>
> It's very important to ensure that the {{Configuration}} the {{CliFrontend}}
> loads ends up in the {{*ContexteEnvironment}} and that its settings are
> reflected there. Currently, there are no tests for this behaviour and it is
> hard to convince yourself that the code is actually doing the right thing. We
> should simplify the flow of the {{Configuration}} from loading to the
> environment and add tests that verify this behaviour.
> Currently, the flow is roughly this:
> - the {{main()}} method loads the {{Configuration}} (from
> {{flink-conf.yaml}})
> - the {{Configuration}} is passed to the {{CustomCommandLines}} in
> {{loadCustomCommandLines()}}
> - {{main()}} passes both the {{Configuration}} and the
> {{CustomCommandLines}} to the constructor of {{CliFrontend}}
> - when we need a {{Configuration}} for execution
> {{getEffectiveConfiguration()}} is called. This doesn't take the
> {{Configuration}} of the {{CliFrontend}} as a basis but instead calls
> {{CustomCommandLine.applyCommandLineOptionsToConfiguration}}
> It's up to the {{CustomCommandLine.applyCommandLineOptionsToConfiguration()}}
> implemenation to either forward the {{Configuration}} that was given to it by
> the {{CliFrontend.main()}} method or return some other {{Configuration}}.
> Only if the correct {{Configuration}} is returned can we ensure that user
> settings make it all the way though.
> I'm proposing to change
> {{CustomCommandLine.applyCommandLineOptionsToConfiguration()}} to instead
> apply it's settings to a {{Configuration}} that is passed in a parameter,
> then {{getEffectiveConfiguration()}} can pass in the {{Configuration}} it got
> from the {{main()}} method as a basis and the flow is easy to verify because.
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