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From Jan Høydahl (Commented) (JIRA) <j...@apache.org>
Subject [jira] [Commented] (SOLR-2842) Re-factor UpdateChain and UpdateProcessor interfaces
Date Mon, 17 Oct 2011 19:41:10 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129112#comment-13129112
] 

Jan Høydahl commented on SOLR-2842:
-----------------------------------

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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