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From "Davor Bonaci (JIRA)" <>
Subject [jira] [Assigned] (BEAM-2750) Read whole files as one PCollection element each
Date Fri, 11 Aug 2017 04:42:00 GMT


Davor Bonaci reassigned BEAM-2750:

    Assignee: Christopher Hebert  (was: Davor Bonaci)

> Read whole files as one PCollection element each
> ------------------------------------------------
>                 Key: BEAM-2750
>                 URL:
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-core
>            Reporter: Christopher Hebert
>            Assignee: Christopher Hebert
> I'd like to read whole files as one element each.
> If my input files are hi.txt, what.txt, and yes.txt, then the whole contents of hi.txt
are an element of the returned PCollection, the whole contents of what.txt are the next element,
etc., giving me a PCollection with three elements.
> This contrasts with TextIO which reads a new element for every line of text in the input
> This read (I'll call it WholeFileIO for now) would work like so:
> {code:java}
> PCollection<KV<String, Byte[]>> fileNamesAndBytes = p.apply("Read","/path/to/input/dir/*"));
> {code}
> The above example passes the raw file contents and the filename.
> Alternatively, we could pass a PCollection of some sort of FileWrapper around an InputStream
to support lazy loading.
> This ticket complements [BEAM-2751].

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