SolrJ Client API

SolrJ is built in Java technologies to connect with Solr from a Java application over HTTP.

Solr and SolrJ both are built-in Java technologies, so communication between them is easy and straightforward. While uploading a document, Solr needs all documents in XML or JSON format. SolrJ uses an internal binary protocol by default, called JavaBin. Normally, the client application sends an update request using HTTP POST with JSON or XML format, but the SolrJ client can send the update request as JSON, XML, or Solr's internal binary JavaBin format. The JavaBin protocol is more efficient than XML or JSON.

Apart from normal communication to Solr, SolrJ also supports load balancing across Solr nodes, automatically discovers locations of Solr servers in a SolrCloud mode, and easily handles bulk indexing for large amounts of data. It is also possible to embed Solr within a Java application and connect to it directly without establishing an HTTP connection to the server.

To create a SolrJ...