Jelly-JVM

Java Virtual Machine implementation of Jelly, written in Scala 3.

This collection of libraries aims to provide the full stack of utilities for fast and scalable RDF streaming with the Jelly protocol. You can only use a part of the stack (e.g., only the serializer), or you may choose to use the full gRPC server and the reactive streaming utilities.

Development status

The libraries are in active (alpha) development and are not yet stable. Expect a first stable release in Q1 2023.

The libraries follow the semantic versioning scheme for binary compatibility.

The jelly-stream and jelly-grpc currently use the Akka library (2.6.x), with the last release available on the Apache 2.0 license. Due to the licensing change of Akka, in future versions it is planned to switch to the community fork of Akka – Apache Pekko, when it becomes available.

Modules

jelly-core – serialization and deserialization code (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).
jelly-jena – conversions and interop code for the Apache Jena library.
jelly-rdf4j – conversions and interop code for the RDF4J library.
jelly-stream – utilities for building Reactive Streams of RDF data (based on Akka Streams). Useful for integrating with gRPC or other streaming protocols (e.g., Kafka, MQTT).
jelly-grpc – implementation of a gRPC client and server for the full Jelly protocol.