November 2017
Beginner to intermediate
290 pages
7h 34m
English
book
Learning Apache Apex
by Ananth Gundabattula, Thomas Weise, Munagala V. Ramanath, David Yan, Kenneth Knowles
Content preview from Learning Apache Apex
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Reading the works of Shakespeare in parallel
The first transform applied to the beginning of the pipeline reads the works of Shakespeare from a public bucket on Google Cloud Storage:
TextIO.read().from("gs://apache-beam-samples/shakespeare/*")
This outputs a PCollection containing one string element for each line of all the works of shakespeare. TextIO is a built-in connector for reading collections of lines stored in many text files. The reading will be split across files and also within a file, so this supports both numerous files and extremely large files.
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