SolrEntityProcessor - DIH EntityProcessor that queries an external Solr via
SolrJ
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Key: SOLR-1499
URL: https://issues.apache.org/jira/browse/SOLR-1499
Project: Solr
Issue Type: New Feature
Components: contrib - DataImportHandler
Reporter: Lance Norskog
The SolrEntityProcessor queries an external Solr instance. The Solr documents
returned are unpacked and emitted as DIH fields.
The SolrEntityProcessor uses the following attributes:
* solr='http://localhost:8983/solr/sms'
** This gives the URL of the target Solr instance.
*** Note: the connection to the target Solr uses the binary SolrJ format.
* query='Jefferson&sort=id+asc'
** This gives the base query string use with Solr. It can include any standard
Solr request parameter. This attribute is processed under the variable
resolution rules and can be driven in an inner stage of the indexing pipeline.
* rows='10'
** This gives the number of rows to fetch per request..
** The SolrEntityProcessor always fetches every document that matches the
request..
* fields='id,tag'
** This selects the fields to be returned from the Solr request.
** These must also be declared as <field> elements.
** As with all fields, template processors can be used to alter the contents to
be passed downwards.
* timeout='30'
** This limits the query to 5 seconds. This can be used as a fail-safe to
prevent the indexing session from freezing up. By default the timeout is 5
minutes.
Limitations:
* Solr errors are not handled correctly.
* Loop control constructs have not been tested.
* Multi-valued returned fields have not been tested.
The unit tests give examples of how to use it as the root entity and an inner
entity.
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