[NIFI-2267] Provide a way for Processor to determine running NiFi node type - standalone/clustered, primary/node

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 1.0.0, 1.0.0-Beta
• Component/s: Core Framework
• Assignee: Koji Kawamura
• Reporter: Koji Kawamura
• Created: 15/Jul/16 11:37
• Updated: 19/Jun/17 01:28
• Resolved: 15/Jul/16 15:50

Description

Currently, there's no way for processor to understand if it's running on:

• Standalone or Cluster?
• If in a cluster, is it a Primary node or not?

There're processors that need this information to provide more cluster friendly behavior, such as MonitorActivity.

@OnPrimaryNodeStateChange annotation is already available. However, it's notified only when a primary node has been changed. So, If a processor is added to an existing NiFi cluster, which has already one node elected as a primary node, the processor is not notified, thus it won't be able to know it's a primary node.

This ticket is meant for tracking the effort of adding such capability to provide node type information.

Issue Links

• blocks: NIFI-619 update MonitorActivity processor to be cluster friendly
• links to: GitHub Pull Request #657