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From "Koji Sekiguchi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-769) Support Document and Search Result clustering
Date Sat, 23 May 2009 13:29:45 GMT

    [ https://issues.apache.org/jira/browse/SOLR-769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712420#action_12712420
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Koji Sekiguchi commented on SOLR-769:
-------------------------------------

(snip off from http://www.nabble.com/questions-about-Clustering-tt23681134.html)

I'd like to use this cool stuff on an environment other than English, e.g. Japanese.

I've implemented Carrot2JapaneseAnalyzer (w/ Payload/ITokenType) for this purpose. It worked
well with ClusteringDocumentList example, but didn't work with CarrotClusteringEngine.

What I did is that I inserted the following lines(+) to CarrotClusteringEngine:

{code}
attributes.put(AttributeNames.QUERY, query.toString());
+ attributes.put(AttributeUtils.getKey(Tokenizer.class, "analyzer"),
+ Carrot2JapaneseAnalyzer.class);
{code}

There is no runtime errors, but Carrot2 didn't use my analyzer, it just ignored and used ExtendedWhitespaceAnalyzer
(confirmed via debugger).

Is it classloader problem? I placed my jar in ${solr.solr.home}/lib .


> Support Document and Search Result clustering
> ---------------------------------------------
>
>                 Key: SOLR-769
>                 URL: https://issues.apache.org/jira/browse/SOLR-769
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Grant Ingersoll
>            Assignee: Grant Ingersoll
>            Priority: Minor
>             Fix For: 1.4
>
>         Attachments: clustering-componet-shard.patch, clustering-libs.tar, clustering-libs.tar,
SOLR-769-lib.zip, SOLR-769.patch, SOLR-769.patch, SOLR-769.patch, SOLR-769.patch, SOLR-769.patch,
SOLR-769.patch, SOLR-769.patch, SOLR-769.patch, SOLR-769.patch, SOLR-769.patch, SOLR-769.patch,
SOLR-769.tar, SOLR-769.zip
>
>
> Clustering is a useful tool for working with documents and search results, similar to
the notion of dynamic faceting.  Carrot2 (http://project.carrot2.org/) is a nice, BSD-licensed,
library for doing search results clustering.  Mahout (http://lucene.apache.org/mahout) is
well suited for whole-corpus clustering.  
> The patch I lays out a contrib module that starts off w/ an integration of a SearchComponent
for doing clustering and an implementation using Carrot.  In search results mode, it will
use the DocList as the input for the cluster.   While Carrot2 comes w/ a Solr input component,
it is not the same as the SearchComponent that I have in that the Carrot example actually
submits a query to Solr, whereas my SearchComponent is just chained into the Component list
and uses the ResponseBuilder to add in the cluster results.
> While not fully fleshed out yet, the collection based mode will take in a list of ids
or just use the whole collection and will produce clusters.  Since this is a longer, typically
offline task, there will need to be some type of storage mechanism (and replication??????)
for the clusters.  I _may_ push this off to a separate JIRA issue, but I at least want to
present the use case as part of the design of this component/contrib.  It may even make sense
that we split this out, such that the building piece is something like an UpdateProcessor
and then the SearchComponent just acts as a lookup mechanism.

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