[FLINK-24646] Add operator wrapper for all-round iterations

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: ml-2.0.0
• Component/s: Library / Machine Learning
• Labels: pull-request-available
• Assignee: Yun Gao
• Reporter: Yun Gao
• Created: 26/Oct/21 09:33
• Updated: 15/Dec/21 03:13
• Resolved: 29/Oct/21 08:05

Description

Inside the iteration, we will also broadcast the special events to mark the end of rounds. To process these events, all the operators inside the iteration is wrapped with a specialized wrapper operator. 

There are two kinds of wrappers: the first wrapper would not recreate the users' operator for each round, and the second one would. This issue would implement the first kind. 

Issue Links

• links to: GitHub Pull Request #8