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https://github.com/impetus/kundera

A JPA 2.1 compliant Polyglot Object-Datastore Mapping Library for NoSQL Datastores.Please subscribe to:
https://github.com/impetus/kundera

java jpa kundera nosql polyglot

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A JPA 2.1 compliant Polyglot Object-Datastore Mapping Library for NoSQL Datastores.Please subscribe to:

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README 

        
[![Join the chat at https://gitter.im/Impetus/Kundera](https://badges.gitter.im/Impetus/Kundera.svg)](https://gitter.im/Impetus/Kundera) [![Follow us on Twitter](http://i.imgur.com/wWzX9uB.png)](https://twitter.com/kundera_impetus)



Overview

=========

Kundera is a "Polyglot Object Mapper" with a JPA interface. The idea behind Kundera is to make working with NoSQL Databases drop-dead simple and fun. Kundera is being developed with following objectives:

* To make working with NoSQL as simple as working with SQL

* To serve as JPA Compliant mapping solution for NoSQL Datastores.

*	To help developers, forget the complexity of NoSQL stores and focus on Domain Model.

*	To make switching across data-stores as easy as changing a configuration.



Latest 

======

* **Ethereum** public data can be stored to any database of your choice. Check [Kundera with Ethereum](https://github.com/impetus-opensource/Kundera/wiki/Kundera-with-Ethereum-Blockchain) for more details.

* Kundera now supports **RethinkDB**. Check [Kundera with RethinkDB](https://github.com/impetus-opensource/Kundera/wiki/Kundera-with-RethinkDB) for more details.

* Kundera supports **Apache Kudu**. Check [Kundera with Kudu](https://github.com/impetus-opensource/Kundera/wiki/Kundera-with-Kudu) for more details.

* Want to step out of JPA world and still take advantage of Kundera? Check [Kundera Data as Object](https://github.com/impetus-opensource/Kundera/wiki/Kundera-Data-As-Object).

* Want to save your large files in MongoDB GridFS in the same JPA way. Check [GridFS support in Kundera](https://github.com/impetus-opensource/Kundera/wiki/GridFS-support-with-Kundera-MongoDB).

* Perform SQL queries over big data using Kundera with **Apache Spark** as the query engine. Check [Kundera with Spark](https://github.com/impetus-opensource/Kundera/wiki/Kundera-with-Spark) for more details. 

* We are active on **stackoverflow.com**. Ask questions & check existing [Kundera Tagged Questions](http://stackoverflow.com/questions/tagged/kundera) on stackoverflow. 



Supported Datastores 

=====================

Kundera currently supports following data stores :

*  Cassandra

*  MongoDB

*  HBase

*  Redis

*  OracleNoSQL

*  Neo4j

*  Couchdb

*  RethinkDB

*  Kudu

*  Relational databases

*  Apache Spark

  

You can find the list of data stores(specific versions) supported by Kundera [here](https://github.com/impetus-opensource/Kundera/wiki/Datastores-Supported).



Getting Started

===============

The latest stable release of Kundera is 3.13.

It is a maven based project . You can either download it directly from github and build using following command :



mvn clean install -Dfile src/pom.xml 



Or it can be directly added as maven dependency in your project in the following manner :

 

  * Add the following repository to pom.xml :

   

   ```

    

        sonatype-nexus

        Kundera Public Repository

        https://oss.sonatype.org/content/repositories/releases

       

           true

       

       

           false

       

    

   ```

  

  * Add the data store specific Kundera module as a dependency (e.g. Cassandra below) :

  

  ```

    

          com.impetus.kundera.client

          kundera-cassandra

          ${kundera.version}

    

  ```



Build your project with the above changes to your pom.xml and start using Kundera !



Important Links

===============

* [Kundera in 5 minutes](https://github.com/impetus-opensource/Kundera/wiki/Getting-Started-in-5-minutes)

* [Data Store specific Configurations](https://github.com/impetus-opensource/Kundera/wiki/Data-store-Specific-Configuration)

* Features :

   * [Polyglot Persistence](https://github.com/impetus-opensource/Kundera/wiki/Polyglot-Persistence)

   * [JPQL](https://github.com/impetus-opensource/Kundera/wiki/JPQL) & [Native Query](https://github.com/impetus-opensource/Kundera/wiki/Native-queries) Support

   * [Schema Generation](https://github.com/impetus-opensource/Kundera/wiki/Schema-Generation)

   * [Transaction Management](https://github.com/impetus-opensource/Kundera/wiki/Transaction-Management)

   * [Rest Based Access](https://github.com/impetus-opensource/Kundera/wiki/REST-Based-Access)

   * [Aggregation over NoSQL](https://github.com/impetus-opensource/Kundera/wiki/How-to-perform-aggregation-over-data-stored-in-NoSQL%3F)

* Tutorials :

   * [Kundera with Openshift](https://github.com/impetus-opensource/Kundera/wiki/Deploying-Polyglot-(RDBMS---NoSQL)-Applications-on-Openshift)

   * [Kundera with Play Framework](https://github.com/impetus-opensource/Kundera/wiki/Using-Kundera-with-Play!-Framework)

   * [Kundera with GWT](https://github.com/impetus-opensource/Kundera/wiki/Using-Kundera-with-GWT)

   * [Kundera with JBoss](https://github.com/impetus-opensource/Kundera/wiki/Using-Kundera-with-Jboss)

   * [Kundera with Spring](https://github.com/impetus-opensource/Kundera/wiki/Building-Applications-with-Kundera-and-Spring)

   * [Kundera with Spark](https://github.com/impetus-opensource/Kundera/wiki/Kundera-with-Spark)

* [Kundera Tagged Questions on stackoverflow.com](http://stackoverflow.com/questions/tagged/kundera)

* [Releases](https://github.com/impetus-opensource/Kundera/blob/trunk/src/README.md)



Troubleshooting

===============

* [Common Issues and Troubleshooting](https://github.com/impetus-opensource/Kundera/wiki/Common-Issues-and-Troubleshooting)



Sample Projects

===============

Please use latest version of Kundera in these sample projects.



* [kundera-mongodb-kudu-example.zip (MongoDB - Kudu polyglot)](https://github.com/impetus-opensource/Kundera/blob/trunk/examples/basic-examples/downloadables/kundera-mongodb-kudu-example.zip?raw=true)

* [kundera-cassandra-example.zip](https://github.com/impetus-opensource/Kundera/blob/trunk/examples/basic-examples/downloadables/kundera-cassandra-example.zip?raw=true)

* [kundera-mongodb-example.zip](https://github.com/impetus-opensource/Kundera/blob/trunk/examples/basic-examples/downloadables/kundera-mongodb-example.zip?raw=true)

* [kundera-hbase-example.zip](https://github.com/impetus-opensource/Kundera/blob/trunk/examples/basic-examples/downloadables/kundera-hbase-example.zip?raw=true)



Contribution

============

* [Contribution Ideas](https://github.com/impetus-opensource/Kundera/wiki/How-to-Contribute#contribution-ideas)

* [Contribution Guidelines](https://github.com/impetus-opensource/Kundera/wiki/How-to-Contribute#contribution-guidelines)



About Us

========

Kundera is backed by Impetus Labs - iLabs. iLabs is a R&D consulting division of [Impetus Technologies](http://www.impetus.com). iLabs focuses on innovations with next generation technologies and creates practice areas and new products around them. iLabs is actively involved working on High Performance computing technologies, ranging from distributed/parallel computing, Erlang, grid softwares, GPU based software, Hadoop, Hbase, Cassandra, CouchDB and related technologies. iLabs is also working on various other Open Source initiatives.



Follow us on [Twitter](https://twitter.com/kundera_impetus).