[NIFI-4224] Add Variable Registry at Process Group level

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Component/s: Core Framework
• Assignee: Matt Gilman
• Reporter: Mark Payne
• Created: 25/Jul/17 12:34
• Updated: 30/Aug/17 15:58
• Resolved: 30/Aug/17 15:57

Description

Currently, NiFi exposes a variable registry that is configurable by adding the name of a properties file to nifi.properties and then treating the referenced properties file as key/value pairs for the variable registry. This, however, is very limiting, as it provides a global scope for all variables, and it requires a restart of NiFi in order to pick up any updates to the file. We should expose a Process Group-level Variable Registry.

Issue Links

• is depended upon by: NIFI-4280 UI - Support configuring variables at a Process Group level
• links to: GitHub Pull Request #2051
• links to: GitHub Pull Request #2116