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https://issues.apache.org/jira/browse/UIMA-3096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13715259#comment-13715259
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Tommaso Teofili commented on UIMA-3096:
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I think it'd make sense to have something like this for ElasticSearch in LuCas
if Lucene is the "source" for ES so that for example one step of the UIMA
pipeline maps CAS FeatureStructures to Lucene documents and one other maps
Lucene documents to ES (but it may be Solr as well).
If instead a mapping between CAS FeatureStructures and ES is done in one single
step (without explicitly passing through the separate Lucene indexing like
SolrCas is doing) then it'd be probably worth a separate addon for ES mapping.
However given we're talking about the former scenario I'd say it would fit into
LuCas for now.
> A LuCas extension that allows ro index the Lucene documents created by LuCas
> into a Solr server.
> ------------------------------------------------------------------------------------------------
>
> Key: UIMA-3096
> URL: https://issues.apache.org/jira/browse/UIMA-3096
> Project: UIMA
> Issue Type: Improvement
> Components: Sandbox-Lucas
> Affects Versions: 2.4.0Addons
> Reporter: Erik Faessler
> Priority: Minor
> Attachments: lucasToSolr.patch
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> Add a UIMA component extending LuceneDocumentAE that converts the Lucene
> document instances created by LuCas into Solr's PreAnalyzed field format
> (http://wiki.apache.org/solr/PreAnalyzedField). The converted documents are
> then sent in batches to Solr using the SolrJ API.
> On the Solr side, PreAnalyzedUpdateProcessorFactory
> (http://lucene.apache.org/solr/4_3_1/solr-core/org/apache/solr/update/processor/FieldMutatingUpdateProcessorFactory.html)
> can be used to restrict the pre-analyzed field values to an existing Solr
> schema. In case that the LuCas mapping file matches the Solr schema, it is
> easy as this:
> In solrconfig.xml, add this updateRequestProcessorChain:
> <updateRequestProcessorChain name="pre-analyzed-json">
> <processor class="solr.PreAnalyzedUpdateProcessorFactory">
> <str name="fieldRegex">.*</str>
> <str name="parser">json</str>
> </processor>
> <processor class="solr.RunUpdateProcessorFactory" />
> </updateRequestProcessorChain>
> Then, add this chain to the default update handler:
> <requestHandler name="/update" class="solr.UpdateRequestHandler">
> <lst name="defaults">
> <str name="update.chain">pre-analyzed-json</str>
> </lst>
> </requestHandler>
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