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From "Ahmet Altay (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (BEAM-1450) NewDoFn does not properly explode windows
Date Tue, 04 Apr 2017 20:45:41 GMT

     [ https://issues.apache.org/jira/browse/BEAM-1450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ahmet Altay resolved BEAM-1450.
-------------------------------
       Resolution: Fixed
    Fix Version/s: Not applicable

> NewDoFn does not properly explode windows
> -----------------------------------------
>
>                 Key: BEAM-1450
>                 URL: https://issues.apache.org/jira/browse/BEAM-1450
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py
>            Reporter: Robert Bradshaw
>            Assignee: Robert Bradshaw
>             Fix For: Not applicable
>
>
> A window-taking DoFn's process gets called once per window, but each output gets placed
into all windows. 
> E.g. the following test fails
> {code}
>   def test_window_param(self):
>     class TestDoFn(DoFn):
>       def process(self, element, window=DoFn.WindowParam):
>         yield (element, (float(window.start), float(window.end)))
>     pipeline = TestPipeline()
>     pcoll = (pipeline
>              | Create([1, 7])
>              | Map(lambda x: TimestampedValue(x, x))
>              | WindowInto(windowfn=SlidingWindows(10, 5))
>              | ParDo(TestDoFn()))
>     assert_that(pcoll, equal_to([(1, (-5, 5)), (1, (0, 10)),
>                                  (7, (0, 10)), (7, (5, 15))]))
>     pcoll2 = pcoll | 'Again' >> ParDo(TestDoFn())
>     assert_that(
>         pcoll2,
>         equal_to([
>             ((1, (-5, 5)), (-5, 5)), ((1, (0, 10)), (0, 10)),
>             ((7, (0, 10)), (0, 10)), ((7, (5, 15)), (5, 15))]),
>         label='doubled windows')
>     pipeline.run()
> {code}



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