lidavidm commented on code in PR #36205:
URL: https://github.com/apache/arrow/pull/36205#discussion_r1238790196


##########
TODOs.txt:
##########
@@ -0,0 +1,17 @@
+- Use a uniform API for all async Flight client APIs:
+
+  void Foo(const FlightCallOptions&, shared_ptr<ReadListener<T>> listener);
+
+  - shared_ptr, or raw pointer? (gRPC uses the latter...)
+  - How does this look for writes?
+  - Maybe we always call AddHold and RemoveHold? (It's unclear to me
+    why you'd want to read/write after the stream ends...)
+
+- StopToken needs to be able to run a callback, so that we can cancel gRPC 
calls.

Review Comment:
   I don't think there's a scope that would work, so we would have to 
explicitly deregister it before calling OnFinish.



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