[jira] [Created] (NIFI-1053) Document the 'What if I change...' aspects of processor evolution

["Joseph Witt (JIRA)" <ji...@apache.org>]

Joseph Witt created NIFI-1053:
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             Summary: Document the 'What if I change...' aspects of processor evolution
                 Key: NIFI-1053
                 URL: https://issues.apache.org/jira/browse/NIFI-1053
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Documentation & Website
            Reporter: Alan Jackoway
             Fix For: 0.4.0


Alan brought up a strong point on the dev thread.  That is basically that it is unclear today or not well documented what the mindset for a developer can/should be or a user can/should be in the presence of a variety of scenarios of processor/extension changes.  The questions that follow are oriented around processors.  But we must do this for all extension types.

But I agree with you that we should make this a fully documented concept in the developer guide (so they know what they can/cannot do) and possibly the user guide (so they know what was done to them).  We need to cover at least:

- I want to change the processor class name
- I want to change the processor package name
- I want to add processor relationships
- I want to remove processor relationships
- I want to add processor properties
- I want to remove processor properties
- I want to change a required property to optional
- I want to change an optional property to required
- I want to change the display name of a property
- I want to change the behavior of a processor that could have different side effects despite the same configuration




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