Solr Mapping Update Processor

This processor can map values of an input field to another value in the output field.

Build

Build with maven:

mvn package

Copy the jar to a place where Solr can find it:

SOLR_HOME=/path/to/solr/home
mkdir $SOLR_HOME/lib
cp target/mapping-processor-1.1.0.jar $SOLR_HOME/lib/

Install

NB: works only with unreleased build, see https://s.apache.org/solr-plugin:

bin/solr plugin repo add cominvent https://github.com/cominvent/solr-plugins
bin/solr plugin install mapping-processor

OR the old way:

Download a pre-built jar from releases section. and drop it in your $SOLR_HOME/lib/

solrconfig.xml

Define the Processor:

<updateProcessor class="MappingUpdateProcessorFactory" name="mapping-processor>
  <str name="inputField">myInField</str>
  <str name="outputField">MyOutField</str>
  <str name="idField">id</str>
  <str name="fallback"></str>
  <str name="mappingFile">mappings.txt</str>
</processor>

The mapping file has same syntax as synonyms.txt, e.g.

fromValue => toValue
colour => color

Now you can refer to this processor by name in either an update chain or directly on the request, e.g. http://localhost:8983/solr/foo/update?processor=mapping-processor