Welcome to Spine CoreJvm Library

June 16, 2026 · View on GitHub

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Spine Event Engine is a Java/Kotlin framework for building Event Sourcing and CQRS applications that are accessed by clients built with TypeStript, JavaScript, Java Nano (Android), Dart, and Java/Kotlin.

Releases

The project is under active ongoing development. You are welcome to experiment and provide your feedback.

The latest stable version is 1.9.0.

Contents

This repository contains the code of:

  • core types;
  • client API;
  • server API;
  • testing utilities for the client- and server-side code.

Quick start and examples

Please see the “Quick Start” guide that goes through a Hello World project showing how to create a Spine-based project.

More introductory application examples are available from the Spine Examples GitHub organization.

Building from sources

Starting version 2.0.0-SNAPSHOT.210 building Spine modules requires JDK 17.

Versions of the v1.x family could be built with JDK 8.

Gradle is used as a build and dependency management system.

This repository uses configuration files shared across several Spine libs. They are plugged in as a Git submodule. Use the following command to initialize it:

git submodule update --init --recursive

Also, a script called pull in the root of the core-jvm project that can be used to update to the latest version of the configuration files.

Important warnings

  • The code annotated with @Internal are not parts of public API of the framework. Therefore, such API should not be used from the outside of the framework.

  • The public API marked as @Experimental may be used at own risk; it can change at any time, and has no guarantee of API stability or backward-compatibility.

  • The API annotated with @SPI is for those who intend to extend the framework, or provide custom storage implementations.

If you need to use API with one of these annotations, please contact us.