[FLINK-26850] Add MetricType enum

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.16.0
• Component/s: Runtime / Metrics
• Labels: pull-request-available
• Assignee: Chesnay Schepler
• Reporter: Chesnay Schepler
• Created: 24/Mar/22 13:49
• Updated: 28/Mar/22 19:02
• Resolved: 28/Mar/22 19:02

Description

Reporters currently have to resort to instanceof checks to handle different metric types. An enum coude make this code cheaper and easier to maintain as the enum would provide a listing of all metric types that exist.

Issue Links

• links to: GitHub Pull Request #19231