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https://issues.apache.org/jira/browse/STORM-789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14507839#comment-14507839
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Dan Blanchard commented on STORM-789:
-------------------------------------
Thanks [~revans2]! I actually would really appreciate it if you and [~ptgoetz]
could squeeze this into 0.10.X. I help maintain both a Python (streamparse)
and a Perl (IO::Storm) library for interfacing with Storm, and I would love to
be able to take advantage of this in those projects as soon as possible.
> Enhance topology context sent to multi-lang bolts and spouts
> ------------------------------------------------------------
>
> Key: STORM-789
> URL: https://issues.apache.org/jira/browse/STORM-789
> Project: Apache Storm
> Issue Type: Improvement
> Reporter: Dan Blanchard
> Assignee: Dan Blanchard
> Fix For: 0.11.0
>
>
> I'm about to submit a pull request that adds a lot more contextual
> information to the "context" JSON dictionary that gets sent to multi-lang
> bolts and spouts as part of their initial handshake. These additions will
> make is so non-JVM developers have access to the sources, targets, and field
> names for their bolts and spouts.
> We will add support for this in streamparse (one of the more popular Python
> libraries for Storm) as soon as this gets merged in.
> Here are the details of what I've added:
> - componentid: the component ID for this task, so you don't have to look it
> up
> in "task->component" by "taskid"
> - streams: a list of all of the streams for this task
> - stream->outputfields: a mapping from stream names to output fields for
> that
> stream
> - stream->target->grouping: a mapping from stream names to the targets for
> this
> task to the kind of grouping they use.
> - sources->grouping: a mapping from the component IDs of the sources to
> their
> grouping.
> Note on groupings: groupings are either represented as a string (e.g.,
> "SHUFFLE") or a list of strings for field groupings.
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