[FLINK-18430] Upgrade stability to @Public for CheckpointedFunction and CheckpointListener

• Type: Improvement
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.11.0
• Component/s: API / DataStream
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 24/Jun/20 16:07
• Updated: 25/Jun/20 09:51
• Resolved: 24/Jun/20 18:48

Description

The two interfaces CheckpointedFunction and CheckpointListener are used by many users, but are still (for years now) marked as @PublicEvolving.

I think this is not correct. They are very core to the DataStream API and are used widely and should be treated as @Public.