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From "Sujen Shah (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (NUTCH-2132) Publisher/Subscriber model for Nutch to emit events
Date Fri, 02 Oct 2015 08:56:26 GMT

     [ https://issues.apache.org/jira/browse/NUTCH-2132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sujen Shah updated NUTCH-2132:
------------------------------
    Attachment: NUTCH-2132.patch

Attaching a patch which describes my idea for a Pub/Sub model. 
This contains the events being published and an interface which could have multiple implementations
of a queueing mechanism. 
I have currently implemented it using RabbitMQ. 

Feedback welcomed :) 

> 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). 
> 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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