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

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.14.0
• Component/s: NiFi Stateless
• Assignee: Mark Payne
• Reporter: Mark Payne
• Created: 01/Jun/21 13:58
• Updated: 06/Jul/21 21:46
• Resolved: 06/Jul/21 21:46

Description

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.

Issue Links

• links to: GitHub Pull Request #5113