Elasticsearch is a search engine based on Lucene. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. Elasticsearch is developed in Java and is released as open source under the terms of the Apache License.

To use it, user needs to add the following dependency in pom.xml:

<dependency>
     <groupId>com.impetus.kundera.client</groupId>
     <artifactId>kundera-elastic-search</artifactId>
     <version>${kundera.version}</version>
</dependency>

Kundera supports Elasticsearch in two ways -

• As a data store
• As an index store