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

    @Entity
    @Table(name = "PERSON", schema = "testDB@mongo_pu")
    public class PersonMongo
   {
    /** The person id. */
    @Id
    @Column(name = "PERSON_ID")
    private String personId;
    /** The person name. */
    @Column(name = "PERSON_NAME")
    private String personName;
    /** The age. */
    @Column(name = "AGE")
    private int age;
    // setters and getters. 
    }

    <persistence-unit name="mongo_pu">
            <provider>com.impetus.kundera.KunderaPersistence</provider>
            <properties>
                    <property name="kundera.nodes" value="localhost" />
                    <property name="kundera.port" value="27017" />
                    <property name="kundera.keyspace" value="testDB" />
                    <property name="kundera.dialect" value="mongodb" />                     
                    <property name="kundera.ddl.auto.prepare" value="create" />
                    <property name="kundera.client.lookup.class"
                            value="com.impetus.client.mongodb.MongoDBClientFactory" />
            </properties>
    </persistence-unit>

    PersonMongo person = new PersonMongo();
    person.setPersonId("1");
    person.setPersonName("John Smith");
    person.setAge(32);
    EntityManagerFactory emf = Persistence.createEntityManagerFactory("mongo_pu");
    EntityManager em = emf.createEntityManager();
    //Insert data
    em.persist(person);
    em.clear();   //Clear cache before finding record
    //Search for data
    Person personFound = em.find(PersonMongo.class, "1");        
    //Update data
    person.setAge(33);
    em.merge(person);
    //Delete data
    em.remove(person);
    em.close();
    emf.close();