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Jelly-JVM

Jelly-JVM is an implementation of the Jelly serialization format and the gRPC streaming protocol for the Java Virtual Machine (JVM), written in Scala 3. The supported RDF libraries are Apache Jena and Eclipse RDF4J.

This collection of libraries aims to provide the full stack of utilities for fast and scalable RDF streaming with the Jelly protocol.

Getting started with plugins – no code required

See the Getting started guide for a quick way to use Jelly with your Apache Jena or RDF4J application without writing any code.

Getting started for developers

If you want to use the full feature set of Jelly-JVM in your code, see the Getting started guide for developers.

TODO: versioning – point to the version selector in the navbar

0.12.1

dev

Library modules

The implementation is split into a few modules that can be used separately:

  • jelly-core – implementation of the Jelly serialization format (using the scalapb library), along with generic utilities for converting the deserialized RDF data to/from the representations of RDF libraries (like Apache Jena or RDF4J).

    • See jelly-core 0.12.1 module details Browse jelly-core 0.12.1 API docs

  • jelly-jena – conversions and interop code for the Apache Jena library.

    • See jelly-jena 0.12.1 module details Browse jelly-jena 0.12.1 API docs

  • jelly-rdf4j – conversions and interop code for the RDF4J library.

    • See jelly-rdf4j 0.12.1 module details Browse jelly-rdf4j 0.12.1 API docs

  • jelly-stream – utilities for building Reactive Streams of RDF data (based on Pekko Streams). Useful for integrating with gRPC or other streaming protocols (e.g., Kafka, MQTT).

    • See jelly-stream 0.12.1 module details Browse jelly-stream 0.12.1 API docs

  • jelly-grpc – implementation of a gRPC client and server for the Jelly gRPC streaming protocol.

    • See jelly-grpc 0.12.1 module details Browse jelly-grpc 0.12.1 API docs

TODO: PLUGIN JARS

Compatibility

The Jelly-JVM implementation is compatible with Java 11 and newer. Java 11, 17, and 21 are tested in CI and are guaranteed to work. Jelly is built with Scala 3 LTS releases.

The following table shows the compatibility of the Jelly-JVM implementation with other libraries:

Jelly Scala Java RDF4J Apache Jena Apache Pekko
1.0.x (current) 3.3.x (LTS) 11+ 4.x.y 4.x.y 1.0.x

Documentation

Below is a list of all documentation pages about Jelly-JVM. You can also browse the Javadoc using the badges in the module list above. The documentation uses examples written in Scala, but the libraries can be used from Java as well.