lidavidm commented on a change in pull request #12659:
URL: https://github.com/apache/arrow/pull/12659#discussion_r830267707
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File path: python/pyarrow/_flight.pyx
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@@ -1707,16 +1735,26 @@ cdef class ClientAuthSender(_Weakrefable):
return result
-cdef CStatus _data_stream_next(void* self, CFlightPayload* payload) except *:
+cdef CStatus _data_stream_next(void* c_state,
+ CFlightPayload* payload) except *:
"""Callback for implementing FlightDataStream in Python."""
+ server_state = <object> c_state
+ try:
+ if not isinstance(server_state.this, GeneratorStream):
+ raise RuntimeError(
+ "self object in callback is not GeneratorStream")
+ stream = <GeneratorStream> server_state.this
+ return _data_stream_do_next(stream, server_state, payload)
+ except Exception as e:
+ server_state.log_exception("do_get", e)
Review comment:
Yes, basically DoGet returns a Stream and the Stream is consumed by the
C++ side to finish off the call. So this is still within the DoGet RPC even if
control flow is outside the Cython do_get code.
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