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Posted to droids-dev@incubator.apache.org by "Richard Frovarp (JIRA)" <ji...@apache.org> on 2012/06/15 02:46:45 UTC
[jira] [Updated] (DROIDS-58) Implement a filter mechanism that
allow intecepting every stage of a crawling process
[ https://issues.apache.org/jira/browse/DROIDS-58?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Richard Frovarp updated DROIDS-58:
----------------------------------
Fix Version/s: (was: 0.2.0)
0.3.0
> Implement a filter mechanism that allow intecepting every stage of a crawling process
> -------------------------------------------------------------------------------------
>
> Key: DROIDS-58
> URL: https://issues.apache.org/jira/browse/DROIDS-58
> Project: Droids
> Issue Type: New Feature
> Affects Versions: 0.1.0
> Reporter: Mingfai Ma
> Fix For: 0.3.0
>
>
> refer to this:
> http://mail-archives.apache.org/mod_mbox/incubator-droids-dev/200906.mbox/%3Cbc1833ba0906250438t1464d1a0jd62cc4790b663938@mail.gmail.com%3E
> assume the process is
> 1. poll a link from queue
> 2. fetch entity
> 3. parse entity
> 4. extract outlinks
> we provide a mechanism to intercept the process in every stage. e.g. a LinkFilter has a "public T polled(T link);" interface, any filter may reject or transform a Link polled from the queue. similar logic applies to fetching, parsing, and extracting (outlink)
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