[jira] [Commented] (MINIFICPP-930) Add expression language support to Controller Services

["Mr TheSegfault (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MINIFICPP-930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16872354#comment-16872354 ] 

Mr TheSegfault commented on MINIFICPP-930:
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Of note is that Controller Services do have access to minifi.properties and properties defined by said controller service, but no way to evaluate those properties using EL ( if it is built ).

> Add expression language support to Controller Services
> ------------------------------------------------------
>
>                 Key: MINIFICPP-930
>                 URL: https://issues.apache.org/jira/browse/MINIFICPP-930
>             Project: Apache NiFi MiNiFi C++
>          Issue Type: Improvement
>            Reporter: Daniel Bakai
>            Priority: Minor
>
> Controller Services should probably have EL capabilities. Currently there is no concept of ConfigurationConcept – but this has the same effective interface as a ProcessContext. The annotations in NiFi make it easy to schedule these elements, but we can simply do this in the controller services prior to being enabled.
> Probably a pretty low priority since Controller Services aren't written very frequently in MiNiFi C++ – but there is also a gap in that properties could be defined that support EL without the ability to execute them. We should fill this gap on a time frame that makes sense .
>  
> While this was a previously known gap I've forgotten about this myself which implies we probably would be doing a disservice to developers and users who expect this capability. 
> Initially identified by [~bakaid]



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