[BEAM-1159] DoFnSignature should have info on the fn's side inputs and outputs

• Type: Improvement
• Status: Open
• Priority: P3
• Resolution: Unresolved
• Component/s: sdk-java-core
• Labels: Clarified
• Assignee: Unassigned
• Reporter: Eugene Kirpichov
• Created: 14/Dec/16 22:33
• Updated: 03/Jun/22 16:33

Description

This is logically part of the fn itself, rather than its enclosing transform.

Example where this would have been important: signature.processElement().observesWindow() should return true for a DoFn that has any side inputs, since side inputs are windowed. See BEAM-1149.