Luke Request Handler

The Luke Request Handler offers programmatic access to the information provided on the Schema Browser Screen page of the Admin UI. It is modeled after Luke, the Lucene Index Browser. It is an implicit handler, so you don’t need to define it in solrconfig.xml.

The Luke Request Handler accepts the following parameters:

show

Optional

Default: all

The data about the index to include in the response. Options are schema, index, doc, all. * all returns all fields and high level details about the index. * index returns the high level details about the index without all fields. * schema returns details about the schema plus the index data. * doc works in conjunction with docId or id parameters and returns details about a specific document plus the index data.

id

Optional

Default: none

Get a document using the uniqueKeyField specified in the schema.

docId

Optional

Default: none

Get a document using a Lucene documentID.

fl

Optional

Default: none

Limit the returned values to a set of fields. This is useful if you want to increase the numTerms and don’t want a massive response.

numTerms

Optional

Default: 10

The number of top terms for each field.

includeIndexFieldFlags

Optional

Default: true

Choose whether /luke should return the index-flags for each field. Fetching and returning the index-flags for each field in the index has non-zero cost, and can slow down requests to /luke.

LukeRequestHandler Examples

All of the examples in this section assume you are running the "techproducts" Solr example:

bin/solr -e techproducts

To return summary information about the index:

http://localhost:8983/solr/techproducts/admin/luke?numTerms=0

To return schema details about the index:

http://localhost:8983/solr/techproducts/admin/luke?show=schema

To drill into a specific field manu, then you drop the show parameter and add the fl parameter:

http://localhost:8983/solr/techproducts/admin/luke?fl=manu

To see the specifics of a document using the Solr uniqueKeyField field:

http://localhost:8983/solr/techproducts/admin/luke?fl=manu&id=TWINX2048-3200PRO

Alternatively, to work through the Lucene native id:

http://localhost:8983/solr/techproducts/admin/luke?fl=manu&docId=0

From SolrJ, you can access /luke using the LukeRequest object.