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https://issues.apache.org/jira/browse/SOLR-269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12616927#action_12616927
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Ryan McKinley commented on SOLR-269:
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I also like the simplified syntax, and I think the parent should always be a
'chain' -- this can get rid of some of the ugliness.
But the power of the chain model is that each link can take over control
without the others needing to know. For example, I have a processor that
validates everything in the request before passing it on to next processors.
To do this, it reads them all in without passing them down the chain and only
continues when finish() is called.
I also don't see a problem with the factory model. creating a factory is no
more/less difficult then creating a special 'state' object that gets put into
the context. But the the context option, the state is always a Map call away
rather them being right there. Now you have to worry about what key you used
etc...
> 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-simple.patch,
> 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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