sjvanrossum commented on code in PR #34777:
URL: https://github.com/apache/beam/pull/34777#discussion_r2066759501
##########
sdks/python/apache_beam/io/iobase.py:
##########
@@ -1127,47 +1130,155 @@ def __init__(self, sink: Sink) -> None:
self.sink = sink
def expand(self, pcoll):
- do_once = pcoll.pipeline | 'DoOnce' >> core.Create([None])
- init_result_coll = do_once | 'InitializeWrite' >> core.Map(
- lambda _, sink: sink.initialize_write(), self.sink)
+ if (pcoll.is_bounded):
+ do_once = pcoll.pipeline | 'DoOnce' >> core.Create([None])
+ init_result_coll = do_once | 'InitializeWrite' >> core.Map(
+ lambda _, sink: sink.initialize_write(), self.sink)
if getattr(self.sink, 'num_shards', 0):
min_shards = self.sink.num_shards
- if min_shards == 1:
- keyed_pcoll = pcoll | core.Map(lambda x: (None, x))
- else:
- keyed_pcoll = pcoll | core.ParDo(_RoundRobinKeyFn(), count=min_shards)
- write_result_coll = (
+
+ if (pcoll.is_bounded):
+ if min_shards == 1:
+ keyed_pcoll = pcoll | core.Map(lambda x: (None, x))
+ else:
+ keyed_pcoll = pcoll | core.ParDo(_RoundRobinKeyFn(),
count=min_shards)
+ write_result_coll = (
+ keyed_pcoll
+ | core.WindowInto(window.GlobalWindows())
+ | core.GroupByKey()
+ | 'WriteBundles' >> core.ParDo(
+ _WriteKeyedBundleDoFn(self.sink),
AsSingleton(init_result_coll)))
+ else: #unbounded PCollection needes to be written per window
+ if isinstance(pcoll.windowing.windowfn, window.GlobalWindows):
+ widowed_pcoll = (
+ pcoll
+ |
core.WindowInto(window.FixedWindows(self.sink.triggering_frequency),
+
trigger=beam.transforms.trigger.AfterWatermark(),
+
accumulation_mode=beam.transforms.trigger.AccumulationMode.DISCARDING,
+
allowed_lateness=beam.utils.timestamp.Duration(seconds=0))
+ )
+ else: #keep user windowing
+ widowed_pcoll = pcoll
+ if self.sink.convert_fn is not None:
+ widowed_pcoll = widowed_pcoll | core.ParDo(self.sink.convert_fn)
+ if min_shards == 1:
+ keyed_pcoll = widowed_pcoll | core.Map(lambda x: (None, x))
+ else:
+ keyed_pcoll = widowed_pcoll | core.ParDo(_RoundRobinKeyFn(),
count=min_shards)
+ init_result_window_coll = (
keyed_pcoll
- | core.WindowInto(window.GlobalWindows())
- | core.GroupByKey()
- | 'WriteBundles' >> core.ParDo(
- _WriteKeyedBundleDoFn(self.sink), AsSingleton(init_result_coll)))
+ | 'Pair init' >> core.Map(lambda x: (None, x))
+ | 'Pair init gbk' >> core.GroupByKey()
+ | 'InitializeWindowedWrite' >> core.Map(
+ lambda _, sink: sink.initialize_write(), self.sink)
Review Comment:
This doesn't have to depend on the main input, right?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscr...@beam.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
