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https://issues.apache.org/jira/browse/NUTCH-2132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943786#comment-14943786
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Chris A. Mattmann commented on NUTCH-2132:
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True Julien, but that locks us into using Kibana, etc. Ideally one goal of this
would be to enable it to work with multiple downstream front ends. Right now
we're targeting:
* Nutch Web UI (and D3 extensions that we have cooking up)
* Memex Explorer (http://github.com/memex-explorer/memex-explorer) which will
use Bokeh, and possibly Kibana (already uses Kibana)
* potentially other UIs..
> Publisher/Subscriber model for Nutch to emit events
> ----------------------------------------------------
>
> Key: NUTCH-2132
> URL: https://issues.apache.org/jira/browse/NUTCH-2132
> Project: Nutch
> Issue Type: New Feature
> Components: fetcher, REST_api
> Reporter: Sujen Shah
> Labels: memex
> Fix For: 1.11
>
> Attachments: NUTCH-2132.patch
>
>
> It would be nice to have a Pub/Sub model in Nutch to emit certain events (ex-
> Fetcher events like fetch-start, fetch-end, a fetch report which may contain
> data like outlinks of the current fetched url, score, etc).
> A consumer of this functionality could use this data to generate real time
> visualization and generate statics of the crawl without having to wait for
> the fetch round to finish.
> The REST API could contain an endpoint which would respond with a url to
> which a client could subscribe to get the fetcher events.
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