robertwb commented on a change in pull request #11314: [BEAM-9562] Send Timers
over Data Channel as Elements
URL: https://github.com/apache/beam/pull/11314#discussion_r406002550
##########
File path: sdks/python/apache_beam/runners/worker/data_plane.py
##########
@@ -408,27 +470,67 @@ def close_callback(data):
return ClosableOutputStream.create(
close_callback, add_to_send_queue, self._data_buffer_time_limit_ms)
+ def output_timer_stream(self, instruction_id, transform_id, timer_family_id):
+ def add_to_send_queue(timer):
+ if timer:
+ self._to_send.put(
+ beam_fn_api_pb2.Elements.Timer(
+ instruction_id=instruction_id,
+ transform_id=transform_id,
+ timer_family_id=timer_family_id,
+ timers=timer,
+ is_last=False))
+
+ def close_callback(timer):
+ add_to_send_queue(timer)
+ self._to_send.put(
+ beam_fn_api_pb2.Elements.Timer(
+ instruction_id=instruction_id,
+ transform_id=transform_id,
+ timer_family_id=timer_family_id,
+ timers=b'',
+ is_last=True))
+
+ return ClosableOutputStream.create(
+ close_callback, add_to_send_queue, self._data_buffer_time_limit_ms)
+
def _write_outputs(self):
# type: () -> Iterator[beam_fn_api_pb2.Elements]
- done = False
- while not done:
- data = [self._to_send.get()]
- try:
- # Coalesce up to 100 other items.
- for _ in range(100):
- data.append(self._to_send.get_nowait())
- except queue.Empty:
- pass
- if data[-1] is self._WRITES_FINISHED:
- done = True
- data.pop()
- if data:
- yield beam_fn_api_pb2.Elements(data=data)
+ stream_done = False
+ while not stream_done:
+ streams = None
+ if not stream_done:
Review comment:
This will always be true (given the loop condition).
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