UniqueCounter

UniqueCounter is a Solr search component that counts unique values in search results in specified fields

Parameters *

Name	Vale	Note
unique	true / false	Enabling component
unique.field	[field_name]	Name of field you want to examine (details)
unique.method	enum/fc/fcs	Terms enumeration method (details)
unique.missing	true / false	Include missing values (details)

*assuming component name is "unique"

How to set up:

• Add jar to be loaded
• Define component

<searchComponent name="unique" class="com.fuxi.UniqueCounter" />

• Add component to a handler

<arr name="last-components">
  <str>unique</str>
</arr>

Example of usage:

<?xml version="1.0" encoding="UTF-8"?>
<response>

<lst name="responseHeader">
  <int name="status">0</int>
  <int name="QTime">3</int>
  <lst name="params">
    <str name="unique">true</str>
    <arr name="unique.field">
      <str>popularity</str>
      <str>cat</str>
    </arr>
    <str name="facet">true</str>
    <str name="facet.field">popularity</str>
    <str name="facet.mincount">1</str>
    <str name="q">*</str>
    <str name="fl">id,popularity</str>
    <str name="rows">0</str>
  </lst>
</lst>
<result name="response" numFound="21" start="0">
</result>
<lst name="facet_counts">
  <lst name="facet_queries"/>
  <lst name="facet_fields">
    <lst name="popularity">
      <int name="6">5</int>
      <int name="7">4</int>
      <int name="1">2</int>
      <int name="10">2</int>
      <int name="0">1</int>
      <int name="5">1</int>
    </lst>
  </lst>
  <lst name="facet_dates"/>
  <lst name="facet_ranges"/>
</lst>
<lst name="unique">
  <int name="popularity">6</int>
  <int name="cat">15</int>
</lst>
</response>