windowed_wordcount

command
Version: v2.34.0-RC1 Latest Latest
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Published: Oct 26, 2021 License: Apache-2.0, BSD-3-Clause, MIT Imports: 13 Imported by: 0

Documentation

Overview

windowed_wordcount counts words in text, and can run over either unbounded or bounded input collections.

This example is the last in a series of four successively more detailed 'word count' examples. First take a look at minimal_wordcount, wordcount, and debugging_wordcount.

Basic concepts, also in the preceeding examples: Reading text files; counting a PCollection; writing to GCS; executing a Pipeline both locally and using a selected runner; defining DoFns; user-defined PTransforms; defining pipeline options.

New Concepts:

1. Unbounded and bounded pipeline input modes
2. Adding timestamps to data
3. Windowing
4. Re-using PTransforms over windowed PCollections
5. Accessing the window of an element

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