[FLINK-4192] Move Metrics API to separate module

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.1.0
• Component/s: Runtime / Metrics
• Assignee: Chesnay Schepler
• Reporter: Chesnay Schepler
• Created: 11/Jul/16 14:01
• Updated: 26/Jul/16 10:31
• Resolved: 26/Jul/16 10:31

Description

All metrics code currently resides in flink-core. If a user implements a reporter and wants a fat jar it will now have to include the entire flink-core module.

Instead, we could move several interfaces into a separate module.

These interfaces to move include:

• Counter, Gauge, Histogram(Statistics)
• MetricGroup
• MetricReporter, Scheduled, AbstractReporter

In addition a new MetricRegistry interface will be required as well as a replacement for the Configuration.

Issue Links

• links to: GitHub Pull Request #2226