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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 21:10:21 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-2132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15428832#comment-15428832
] 

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_r75551855
  
    --- Diff: src/plugin/publish-rabbitmq/ivy.xml ---
    @@ -0,0 +1,42 @@
    +<?xml version="1.0" ?>
    +
    +<!--
    +   Licensed to the Apache Software Foundation (ASF) under one or more
    +   contributor license agreements.  See the NOTICE file distributed with
    +   this work for additional information regarding copyright ownership.
    +   The ASF licenses this file to You under the Apache License, Version 2.0
    +   (the "License"); you may not use this file except in compliance with
    +   the License.  You may obtain a copy of the License at
    +
    +       http://www.apache.org/licenses/LICENSE-2.0
    +
    +   Unless required by applicable law or agreed to in writing, software
    +   distributed under the License is distributed on an "AS IS" BASIS,
    +   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    +   See the License for the specific language governing permissions and
    +   limitations under the License.
    +-->
    +
    +<ivy-module version="1.0">
    +  <info organisation="org.apache.nutch" module="${ant.project.name}">
    +    <license name="Apache 2.0"/>
    +    <ivyauthor name="Apache Nutch Team" url="http://nutch.apache.org"/>
    +    <description>
    +        Apache Nutch
    +    </description>
    +  </info>
    +
    +  <configurations>
    +    <include file="../../..//ivy/ivy-configurations.xml"/>
    +  </configurations>
    +
    +  <publications>
    +    <!--get the artifact from our module name-->
    +    <artifact conf="master"/>
    +  </publications>
    +
    +  <dependencies>
    +    <dependency org="com.rabbitmq" name="amqp-client" rev="3.5.5" conf="*->default"
/>
    --- End diff --
    
    Please upgrade to 3.6.5 if possible and not API breaking.


> 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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