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https://issues.apache.org/jira/browse/SOLR-2842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129112#comment-13129112
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Jan Høydahl commented on SOLR-2842:
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Interesting thought Ryan. I already commonly isolate processing in a similar
method to simplify unit testing so this is useful in several ways. Do you
suggest to let UpdateProcessor base class implement this interface? But you
still need to construct and initialize the processors even if they are wrapped
in the interface, thus my suggestion for a client side version of the factory.
> Re-factor UpdateChain and UpdateProcessor interfaces
> ----------------------------------------------------
>
> Key: SOLR-2842
> URL: https://issues.apache.org/jira/browse/SOLR-2842
> Project: Solr
> Issue Type: Improvement
> Components: update
> Reporter: Jan Høydahl
>
> The UpdateChain's main task is to send SolrInputDocuments through a chain of
> UpdateRequestProcessors in order to transform them in some way and then
> (typically) indexing them.
> This generic "pipeline" concept would also be useful on the client side
> (SolrJ), so that we could choose to do parts or all of the processing on the
> client. The most prominent use case is extracting text (Tika) from large
> binary documents, residing on local storage on the client(s). Streaming
> hundreds of Mb over to Solr for processing is not efficcient. See SOLR-1526.
> We're already implementing Tika as an UpdateProcessor in SOLR-1763, and what
> would be more natural than reusing this - and any other processor - on the
> client side?
> However, for this to be possible, some interfaces need to change slightly..
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