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From "Josh Wills (JIRA)" <>
Subject [jira] [Updated] (CRUNCH-278) Improvements to MapsideJoin code
Date Thu, 10 Oct 2013 06:26:45 GMT


Josh Wills updated CRUNCH-278:

    Attachment: CRUNCH-278.patch

[~mkwhitacre] and [~gabriel.reid] I'd be obliged if you guys could take a look at this first
cut. I'd like to generalize it somewhat so that you could include DoFns inside of the ReadableSourceBundle<T>
instances that could be used for filtering/transforming the map-side inputs.

I'm also not locked into the names or API structure here-- if there's something you guys like
better, please let me know.

> Improvements to MapsideJoin code
> --------------------------------
>                 Key: CRUNCH-278
>                 URL:
>             Project: Crunch
>          Issue Type: Bug
>          Components: Core, MapReduce Patterns
>            Reporter: Josh Wills
>            Assignee: Josh Wills
>         Attachments: CRUNCH-278.patch
> The fact that we have special-case code in the MapsideJoinStrategy for the in-memory
and MR-based Pipeline instances has always bugged me, so I set out to eliminate the distinction
between the two impls by creating a new interface, ReadableSourceBundle<T>, that encapsulates
the MR and in-memory specific logic for doing mapside joins in order to remove the special-case
code in MapsideJoinStrategy and hopefully make other implementations that use our mapside-join
patterns much easier to test.

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