[FLINK-19165] Clean up the UnilateralSortMerger

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Component/s: API / Core
• Labels: pull-request-available
• Assignee: Dawid Wysakowicz
• Reporter: Dawid Wysakowicz
• Created: 08/Sep/20 17:23
• Updated: 19/Feb/21 07:24
• Resolved: 23/Sep/20 14:07

Description

This is a preparation step for FLIP-140. The purpose of the task is two-folds:

• break down the implementation into a more composable pieces
• introduce a way to produce records in a push-based manner instead of pull-based with additional reading thread.

Issue Links

• links to: GitHub Pull Request #13357