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From "Andrzej Bialecki (JIRA)" <>
Subject [jira] Commented: (NUTCH-443) allow parsers to return multiple Parse object, this will speed up the rss parser
Date Wed, 14 Feb 2007 17:04:06 GMT


Andrzej Bialecki  commented on NUTCH-443:

> Didn't know this, will change this too. (Why is Nutch not using this class in Indexer?)

Inertia, and lack of committer time ... ;)

> Since this patch removes the FetcherOutput class, what to put there instead of it?

Hmm, actually this is an important question. I don't think FetcherOutput is persisted anywhere,
it's just an aggregate class to keep things together before they hit the disk. I propose to
leave a comment in MapWritable like this "// code -123 was reserved for FetcherOutput - no
longer in use". As for the class itself - again, since it's not persisted we don't have to
keep it around, just remove it.

Sections in Fetcher.FetcherThread.output() and similar in Fetcher2 that output the data need
to be synchronized now - output.collect() is no longer a single atomic operation. Perhaps
it's better to leave FetcherOutput after all?

> allow parsers to return multiple Parse object, this will speed up the rss parser
> --------------------------------------------------------------------------------
>                 Key: NUTCH-443
>                 URL:
>             Project: Nutch
>          Issue Type: New Feature
>          Components: fetcher
>    Affects Versions: 0.9.0
>            Reporter: Renaud Richardet
>         Assigned To: Chris A. Mattmann
>            Priority: Minor
>             Fix For: 0.9.0
>         Attachments: NUTCH-443-draft-v1.patch, NUTCH-443-draft-v2.patch, NUTCH-443-draft-v3.patch,
NUTCH-443-draft-v4.patch, NUTCH-443-draft-v5.patch, NUTCH-443-draft-v6.patch, parse-map-core-draft-v1.patch,
parse-map-core-untested.patch, parsers.diff
> allow Parser#parse to return a Map<String,Parse>. This way, the RSS parser can
return multiple parse objects, that will all be indexed separately. Advantage: no need to
fetch all feed-items separately.
> see the discussion at

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