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https://issues.apache.org/jira/browse/NIFI-6077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16782921#comment-16782921
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Rabits commented on NIFI-6077:
------------------------------
Ok, I spent ~3d to prepare a small PoC for NiFi, it introduces forceEl field in
the PropertyDescriptor and allows users to control - use NiFi Expression
Language or not for the fields, that's not supporting the NFEL. Features:
* User controlled force enable/disable Expression Language for any Property
field (Processor / ContextService tested on ListenHTTP w/wo SSL
* Interfaces for serialization/deserialization for templates / flow.xml.gz
(hopefully it works with nifi-registry & cluster at all - need some time to
test)
* Sensitive properties affected too - so you can set the password in variable
and use this value in sensitive property.
Hopefully successors will find a better way to implement the users needs and
this PoC will help them to find a solution.
> Expression Language Force - give users decide where to use EL
> -------------------------------------------------------------
>
> Key: NIFI-6077
> URL: https://issues.apache.org/jira/browse/NIFI-6077
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Configuration, Core Framework, Core UI, Variable Registry
> Affects Versions: 1.9.0
> Reporter: Rabits
> Priority: Major
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> For some reason right now extensions decide where to use and where don't NFEL
> - that's bummer. It makes complete automation impossible and DevOps unhappy.
> I think it will be good to twist this not a good practice and give users more
> freedom in using Expression Language / Variables whenever they want! And I
> think it could be solved by introducing forceEl flag for PropertyDescriptor,
> that could be set by user and saved with property value.
> With the change we can deprecate the old complex and non-intuitive setting
> support of EL in the extensions and even set forceEl by default for some
> extensions that already supporting EL scopes.
>
> I'm already working on the first implementation here:
> https://github.com/apache/nifi/pull/3332
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