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https://issues.apache.org/jira/browse/SOLR-269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12512502
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Yonik Seeley commented on SOLR-269:
-----------------------------------

> How do you all feel about the basic structure?
It's a go!
It will get more complicated, I think, with document modification (SOLR-139)

> While it would be nice to keep the base stuff package protected,

I'm more concerned with the other parts of the API that this moves 
front-and-center... 
mainly UpdateCommand and friends... those were really quick hacks on my part 
since there were no custom "update" handlers at the time.

> One clever change is to have the LogUpdateProcessorFactory skip building a 
> LogUpdateProcessor if the log level is not INFO rather then keep a flag.

Nice!

I also need SOLR-139 btw, is it easy for you to commit this first to limit the 
size and scope of that patch?

> UpdateRequestProcessorFactory - process requests before submitting them
> -----------------------------------------------------------------------
>
>                 Key: SOLR-269
>                 URL: https://issues.apache.org/jira/browse/SOLR-269
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Ryan McKinley
>            Assignee: Ryan McKinley
>             Fix For: 1.3
>
>         Attachments: SOLR-269-UpdateRequestProcessorFactory.patch, 
> SOLR-269-UpdateRequestProcessorFactory.patch, 
> SOLR-269-UpdateRequestProcessorFactory.patch, UpdateProcessor.patch
>
>
> A simple UpdateRequestProcessor was added to a bloated SOLR-133 commit. 
> An UpdateRequestProcessor lets clients plug in logic after a document has 
> been parsed and before it has been 'updated' with the index.  This is a good 
> place to add custom logic for:
>  * transforming the document fields
>  * fine grained authorization (can user X updated document Y?)
>  * allow update, but not delete (by query?)
>    <requestHandler name="/update" class="solr.StaxUpdateRequestHandler" >
>      <str 
> name="update.processor.class">org.apache.solr.handler.UpdateRequestProcessor</str>
>      <lst name="update.processor.args">
>       ... (optionally pass in arguments to the factory init method) ...
>      </lst> 
>    </requestHandler>
> http://www.nabble.com/Re%3A-svn-commit%3A-r547495---in--lucene-solr-trunk%3A-example-solr-conf-solrconfig.xml-src-java-org-apache-solr-handler-StaxUpdateRequestHandler.java-src-java-org-apache-solr-handler-UpdateRequestProcessor.jav-tf3950072.html#a11206583

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