Spine Event Engine is a multi-language framework for building Command Query Responsibility Segregation (CQRS) and Event Sourcing (ES) applications.
The primary language of the backend is Java. Client applications and server-side modules can be written on JavaScript, Java, JavaNano (Android), Swift, Objective-C, C, C++, C#, Go, Python, Ruby and PHP.
Spine aims to free developers from creating boilerplate code as much as possible. Our framework is built on top of Protocol Buffers (a.k.a. protobuf) and gRPC to bring easiness and efficiency into development of applications with microservice-oriented architecture. The goal is to allow developers to focus on the business logic instead of the plumbing.
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We aim to make the domain model language Ubiquitous not only in people interactions, but in computer communications, too. The model is defined and maintained in protobuf. Most of the domain model code is automatically generated for all the programming languages of your project.
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We want the domain model to be strongly typed and open for evolution. Unlike some CQRS/ES frameworks which treat commands and events as Json objects, Spine promotes strong typing of all parts of a business model. The model can be extended without breaking binary compatibility with client applications.
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We give the choice of storage and deployment platforms. The framework promotes writing code which does not depend on storage media or deployment platform. For example, you can start with JDBC-based storage and later switch to Google Cloud Platform Datastore by changing one line of the code.
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We build Spine as an Open Source framework. The Permissive Apache License allows using the framework in closed-source projects. You are welcome to contribute to the framework development.
To get up and running with Spine, check the following articles:
- Our Motivation to build Spine
- Java Documentation
- Examples