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Kenneth Knowles commented on BEAM-1159: --------------------------------------- The expected resolution of this ticket was actually designed long ago, and is included as an appendix to the new DoFn design, here: https://s.apache.org/a-new-dofn#heading=h.1budnm7l01ko It hasn't been a priority yet, but it isn't difficult. It can probably be done in a backwards-compatible manner, though it would be cleaner if we have time to add the new form of support and remove the old way. > DoFnSignature should have info on the fn's side inputs and outputs > ------------------------------------------------------------------ > > Key: BEAM-1159 > URL: https://issues.apache.org/jira/browse/BEAM-1159 > Project: Beam > Issue Type: Improvement > Reporter: Eugene Kirpichov > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)