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From "Lance Norskog (Commented) (JIRA)" <>
Subject [jira] [Commented] (SOLR-2841) Scriptable UpdateRequestChain
Date Thu, 22 Dec 2011 02:01:31 GMT


Lance Norskog commented on SOLR-2841:


Another use case for scripting at the top level is "multi-query" queries:  where the app creates
the second based on the first. Would your proposal handle this problem?

Many use cases for grouping/collapsing can be implemented with 2 queries. Perhaps the guts
of collapsing could be simplified if the more outré use cases could be pushed out into multiple
> Scriptable UpdateRequestChain
> -----------------------------
>                 Key: SOLR-2841
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: update
>            Reporter: Jan Høydahl
> UpdateProcessorChains must currently be defined with XML in solrconfig.xml. We should
explore a scriptable chain implementation with a DSL that allows for full flexibility. The
first step would be to make UpdateChain implementations pluggable in solrconfig.xml, for backward
compat support.
> Benefits and possibilities with a Scriptable UpdateChain:
> * A compact DSL for defining Processors and Chains (Workflows would be a better, less
limited term here)
> * Keeping update processor config separate from solrconfig.xml gives better separations
of roles
> * Use this as an opportunity to natively support scripting language Processors (ideas
from SOLR-1725)
> This issue is spun off from SOLR-2823.

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