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Date: Tue, 15 Mar 2011 22:32:29 +0000 (UTC)
From: "Ahmet Arslan (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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 <1179711157.5304.1300228349662.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] Commented: (SOLR-1499) SolrEntityProcessor - DIH
 EntityProcessor that queries an external Solr via SolrJ
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    [ https://issues.apache.org/jira/browse/SOLR-1499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13007236#comment-13007236 ] 

Ahmet Arslan commented on SOLR-1499:
------------------------------------

Hi,

Can i use this to upgrade solr version? Where the lucene/solr indices are not compatible?

Thanks,
Ahmet

> SolrEntityProcessor - DIH EntityProcessor that queries an external Solr via SolrJ
> ---------------------------------------------------------------------------------
>
>                 Key: SOLR-1499
>                 URL: https://issues.apache.org/jira/browse/SOLR-1499
>             Project: Solr
>          Issue Type: New Feature
>          Components: contrib - DataImportHandler
>            Reporter: Lance Norskog
>            Assignee: Erik Hatcher
>             Fix For: Next
>
>         Attachments: SOLR-1499.patch, SOLR-1499.patch, SOLR-1499.patch, SOLR-1499.patch, SOLR-1499.patch
>
>
> The SolrEntityProcessor queries an external Solr instance. The Solr documents returned are unpacked and emitted as DIH fields.
> The SolrEntityProcessor uses the following attributes:
> * solr='http://localhost:8983/solr/sms'
> ** This gives the URL of the target Solr instance.
> *** Note: the connection to the target Solr uses the binary SolrJ format.
> * query='Jefferson&sort=id+asc'
> ** This gives the base query string use with Solr. It can include any standard Solr request parameter. This attribute is processed under the variable resolution rules and can be driven in an inner stage of the indexing pipeline.
> * rows='10'
> ** This gives the number of rows to fetch per request..
> ** The SolrEntityProcessor always fetches every document that matches the request..
> * fields='id,tag'
> ** This selects the fields to be returned from the Solr request.
> ** These must also be declared as <field> elements.
> ** As with all fields, template processors can be used to alter the contents to be passed downwards.
> * timeout='30'
> ** This limits the query to 5 seconds. This can be used as a fail-safe to prevent the indexing session from freezing up. By default the timeout is 5 minutes.
> Limitations:
> * Solr errors are not handled correctly.
> * Loop control constructs have not been tested.
> * Multi-valued returned fields have not been tested.
> The unit tests give examples of how to use it as the root entity and an inner entity.

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