[LUCENE-9345] Separate IndexWriter from MergeScheduler

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 9.0
• Fix Version/s: 9.0, 8.6
• Lucene Fields: New, Patch Available
• Assignee: Simon Willnauer
• Reporter: Simon Willnauer
• Created: 23/Apr/20 10:18
• Updated: 28/Aug/22 16:02
• Resolved: 24/Apr/20 13:27

Description

MergeScheduler is tightly coupled with IndexWriter which causes IW to expose unnecessary methods. For instance only the scheduler should call IW#getNextMerge() but it's a public method. With some refactorings we can nicely separate the two.

Issue Links

• links to: GitHub Pull Request #1451