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Questions tagged [kundera]

Kundera is a JPA 2.1-compliant object-datastore mapping library for NoSQL datastores.

The idea behind Kundera is to make working with NoSQL databases drop-dead simple and fun. Kundera is being developed with following objectives:

  1. To make working with NoSQL as simple as working with SQL
  2. To serve as JPA-compliant mapping solution for NoSQL datastores.
  3. To help developers, forget the complexity of NoSQL stores and focus on the domain model.
  4. To make switching across data-stores as easy as changing a configuration.

Project Location: https://github.com/impetus-opensource/Kundera

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How can we connect to Cassandra 4.x using Kundera?

We have been using Kundera library in our Java project for connecting to Cassandra database 3.11.11 . The library or jar file that we have been using is com.impetus.kundera.client.kundera-cassandra.3.13.jar Recently the DBA team in our project…
aarti makkar
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Hector integration with CQL

Will Hector be integrated with CQL in Cassandra 0.8.1? Is anyone actively developing this or know of it? Also, does anyone know of any other Java clients (like Pelops, Hector, Kundera, etc) that are being developed to integrate to use the new CQL…
Henry
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Kundera Cassandra JPQL with Compound Key

Am using Kundera JPA for Cassandra. Kundera version is: 3.8 Here are my Entity definitions:- @Embeddable public class PartitionKey implements Serializable { @Column(name = "ID") private String Id; @Column (name = "TYPE") private…
TechEnthusiast
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Cannot persiest inherited Entity to Hbase using kundera

I have two entity classes and one inherited from other, @Entity @Table(name = "common", schema = "url_results@hbase_pu") @Inheritance(strategy = InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name = "launcher") public class Person implements…
user2547836
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Kundera with Datastax DS Driver Connection Port

I'm using Kundera with Datastax DS Driver for Cassandra connection. On persistence.xml, I defined the port as 9042. However, I noticed that that Kundera failed to connect to Cassandra: Tests run: 2, Failures: 0, Errors: 2, Skipped: 0, Time elapsed:…
FrankC
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Kundera persistence entity definition with partition key and cluster key

I am trying to use Kundera for connecting to Cassandra. In my case I have an Entity X with Partition Key {A,B} and cluster key {C}. We have multiple values of C for each A and B combination(primary key). So in such case how should be define the…
Raj
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Could not read commit log descriptor in file

I started to use cassandra 3.7 and always I have problems with the commitlog. When the pc unexpected finished by a power outage for example the cassandra service doesn't restart. I try to start for the command line, but always the error cassandra…
Ezequiel Trapani
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kundera and spring JpaRepository unsupportedOperationException during initialisation

Kundera and Spring seems correctly configured. Kundera generate tables in cassandra database. The persistence seems ok. Spring refuse to initialize JPA repositories with this exception. Do you have any idea ? When I use Postgres with Hibernate, no…
Jean-Jacques Peyronel
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Spring kundera cassandra

Is it possibility to populate database after auto creating with Kundera? I have prepared import.cql file with required data for application and need something like Thanks for…
NikedLab
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InvalidRequestException(why:Unknown identifier

when I tried to save a table to cassandra using persist() method and kundera framework, i receive the error: 28462 [Thread-15-localhostAMQPbolt0-executor[2 2]] INFO d.d.pieceDAOImpl - start to insert data 28513…
h.zak
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Kundera compatibility with Cassandra 3.0.1

Is kundera-cassandra 3.3 fully compatible with Cassandra 3.0.1? As I see, kundera-cassandra uses the cassandra-driver-core-2.1.5.jar and referring to this…
K.E.
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Java Web Application with Kundera JPA on Tomcat 7

I have developed a JAVA Rest Service (JDK 1.8) which uses Kundera (V3.2) for a Cassandra Database connection. If I run my application inside eclipse with a Tomcat-Server everything works well. If I want to deploy .war file on another Tomcat 7 the…
K.E.
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com.impetus.kundera.KunderaException: org.apache.thrift.transport.TTransportException: Read a negative frame size

I am trying load testing by inserting 60k rows in cassandra and after few thousand i run into below error com.impetus.kundera.KunderaException: org.apache.thrift.transport.TTransportException: Read a negative frame size Code Details Cassndra…
Vinod Jayachandran
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kundera-cassandra set cql version on EntityManagerFactory when using spring

I want to use the a sequence generator in an kundera-cassandra (V3.2) entity. Referring to this https://github.com/impetus-opensource/Kundera/issues/777 I have to set the CQL Version to Version 3 when creating the EntityManagerFactory, and not when…
K.E.
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kundera-cassandra criteriaquery with timestamp

I want to create a Query with Kundera which compares a timestamp in the where clause. My cassandra model looks like this: CREATE TABLE booking.booking ( id uuid, amount decimal, timestampCreate timestamp, timestampUpdate timestamp, PRIMARY KEY…
K.E.
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