[jira] [Commented] (NIFI-8644) Update Stateless so that a ParameterProviderDefinition is provided to dataflow instead of ParameterProvider

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-8644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17376047#comment-17376047 ] 

ASF subversion and git services commented on NIFI-8644:
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Commit 6df07df3b2d2dbabeb279ac749ed45c37efd5d01 in nifi's branch refs/heads/main from Mark Payne
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=6df07df ]

NIFI-8644: Introduced a notion of ParameterProviderDefinition

- Refactored stateless to use this when creating a dataflow so that Parameter Provider implementations can be externalized into NARs. Also updated ExtensionDiscoveringManager such that callers are able to provide a new type of class to be discovered (e.g., ParameterProvider) so that the extensions will be automatically discovered
- Put specific command-line overrides as highest precedence for parameter overrides
- Make ParameterOverrideProvider valid by allowing for dynamically added parameters
- Fixed bug in validation logic, added new system tests to verify proper handling of Required and Optional properties
- Addressed review feedback and fixed some bugs. Also added system test to verify Parameter Providers are working as expected

This closes #5113

Signed-off-by: David Handermann <ex...@apache.org>


> Update Stateless so that a ParameterProviderDefinition is provided to dataflow instead of ParameterProvider
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-8644
>                 URL: https://issues.apache.org/jira/browse/NIFI-8644
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: NiFi Stateless
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Major
>             Fix For: 1.14.0
>
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> Currently, when a stateless dataflow is created, a ParameterProvider is supplied, which the engine can use to retrieve parameterized values for the dataflow.
> However, it will make sense going forward to allow for a ParameterProvider to be defined outside of the scope of what is provided by default in the stateless api. For example, there may be a desire to integrate with a a secret store provided by a public cloud service, etc. Such a capability would need to be encapsulated in a NAR instead of added to the root class path.
> As such, we need to refactor the stateless api such that instead of providing a ParameterProvider, we instead introduce a notion of a ParameterProviderDefinition, and then include a List of ParameterProviderDefinitions as part of the Dataflow Definition.
> In this way, we can make the parameter retrieval far more flexible and powerful.



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