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

["Mark Payne (Jira)" <ji...@apache.org>]

Mark Payne created NIFI-8644:
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             Summary: 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


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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