dianfu commented on code in PR #19696:
URL: https://github.com/apache/flink/pull/19696#discussion_r870898350
##########
flink-python/pyflink/datastream/tests/test_window.py:
##########
@@ -410,6 +411,36 @@ def test_side_output_late_data(self):
side_expected = ['+I[a, 4]']
self.assert_equals_sorted(side_expected, side_sink.get_results())
+ def test_global_window_with_purging_trigger(self):
+ self.env.set_parallelism(1)
+ data_stream = self.env.from_collection([
+ ('hi', 1), ('hi', 1), ('hi', 1), ('hi', 1), ('hi', 1), ('hi', 1),
('hi', 1)],
+ type_info=Types.TUPLE([Types.STRING(), Types.INT()])) # type:
DataStream
+
+ watermark_strategy = WatermarkStrategy.for_monotonous_timestamps() \
+ .with_timestamp_assigner(SecondColumnTimestampAssigner())
+
+ class MyProcessFunction(ProcessWindowFunction):
+
+ def clear(self, context: ProcessWindowFunction.Context) -> None:
+ pass
+
+ def process(self, key, context: ProcessWindowFunction.Context,
+ elements: Iterable[Tuple[str, int]]) ->
Iterable[tuple]:
+ return [(key, len([e for e in elements]))]
+
+ data_stream.assign_timestamps_and_watermarks(watermark_strategy) \
+ .key_by(lambda x: x[0], key_type=Types.STRING()) \
+ .window(GlobalWindows.create()) \
+ .trigger(PurgingTrigger.of(CountTrigger.of(5))) \
Review Comment:
```suggestion
.trigger(PurgingTrigger.of(CountTrigger.of(2))) \
```
Change the size to a smaller value to demonstrate that the purging trigger
worked?
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