[FLINK-2682] Add a dedicated processing time aligned keyed window operator

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Implemented
• Affects Version/s: 0.10.0
• Fix Version/s: 0.10.0
• Component/s: API / DataStream
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 15/Sep/15 12:21
• Updated: 28/Feb/19 11:15
• Resolved: 23/Sep/15 18:32

Description

This operator is easier to implement than the event time version and will give us a robust fall-back while tuning the event time implementation.

It is also a good candidate to start exploring the keyed window state abstraction with.