Update Preprocessing

[jonarino <Jo...@verizonwireless.com>]

I am investigating the possibilities of preprocessing my data before it is
indexed. Specifically, I would like to add fields or modify field values
based on other fields in the XML I am injecting.
I am a little confused on where this is supposed to happen; whether as part
of the UpdateRequestProcessor or just a request handler. A little direction
would be great. Especially to know what classes to extend or what exactly is
required. Thanks.
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Re: Update Preprocessing

[Mark Miller <ma...@gmail.com>]

On Fri, Jul 10, 2009 at 6:40 PM, jonarino <Jonathan.Hill@verizonwireless.com
> wrote:

>
> I am investigating the possibilities of preprocessing my data before it is
> indexed. Specifically, I would like to add fields or modify field values
> based on other fields in the XML I am injecting.
> I am a little confused on where this is supposed to happen; whether as part
> of the UpdateRequestProcessor or just a request handler. A little direction
> would be great. Especially to know what classes to extend or what exactly
> is
> required. Thanks.
> --
> View this message in context:
> http://www.nabble.com/Update-Preprocessing-tp24432669p24432669.html
> Sent from the Solr - User mailing list archive at Nabble.com.
>
>
Use an updateRequestProcessorChain - your custom UpdateRequestProcessor will
be able to inspect the documents fields and add/remove them. ie, in
solrconfig.xml:

  <updateRequestProcessorChain name="updateChain">
    <processor class="com.company.project.CustomUpdateRequestProcessor">
    <processor class="solr.LogUpdateProcessorFactory">
      <int name="maxNumToLog">10</int>
    </processor>
    <processor class="solr.RunUpdateProcessorFactory"/>
  </updateRequestProcessorChain>

and then in a RequestHandler you can refer to your chain:

   <lst name="defaults">
      <str name="update.processor">updateChain</str>

-- 
-- 
- Mark

http://www.lucidimagination.com