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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-2132) Publisher/Subscriber model for Nutch to emit events
Date Fri, 19 Aug 2016 21:07:20 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-2132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15428814#comment-15428814
] 

ASF GitHub Bot commented on NUTCH-2132:
---------------------------------------

Github user lewismc commented on a diff in the pull request:

    https://github.com/apache/nutch/pull/138#discussion_r75551452
  
    --- Diff: ivy/ivy.xml ---
    @@ -127,6 +127,9 @@
         	<dependency org="org.apache.wicket" name="wicket-spring" rev="6.16.0" conf="*->default"
/>
         	<dependency org="de.agilecoders.wicket" name="wicket-bootstrap-core" rev="0.9.2"
conf="*->default" />
         	<dependency org="de.agilecoders.wicket" name="wicket-bootstrap-extensions" rev="0.9.2"
conf="*->default" />
    +		
    +		<!-- RabbitMQ dependencies -->
    +		<dependency org="com.rabbitmq" name="amqp-client" rev="3.5.5" conf="*->default"
/>
    --- End diff --
    
    Indentation is off.


> 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
>            Assignee: Chris A. Mattmann
>              Labels: memex
>             Fix For: 1.13
>
>         Attachments: NUTCH-2132.patch, NUTCH-2132.v2.patch, PubSub_routingkey.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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