Spine Event Engine is a framework for building cloud applications and transforming EventStorming into a working domain model code.
Spine promotes strong typing of all parts of a business model. You don't have to deal with JSON.
The model is defined and maintained in Protobuf. The code is automatically generated for all the languages of your project, as you update the model.
The framework promotes writing storage- and platform-agnostic code. You can start with JDBC and later switch to Google Cloud Platform Datastore by changing just a few lines of code.
With Protobuf support, a model can be extended preserving backward compatibility with clients running older code.
Commands, events, query results, entity states, and other data are immutable. This makes them automatically thread-safe, and thus freely shared or referenced.
Permissive Apache License allows using the framework in closed-source projects. You are also welcome to contribute to our framework development.
Constraints defined in a business model are automatically checked for commands, events, and entity states using our validation approach.
Transforming a single-tenant application into
a multi-tenant one requires a few lines of code. You don't have to introduce
tenantId parameters for all the calls.
The story behind Spine
We started developing our framework after completing several CQRS/ES-related projects. This is when we got our hands-on knowledge in manual creation of commands, events, message handlers, delivering messages and data to web and mobile clients.
Using existing CQRS/ES frameworks made us compromise on a number of things, including type safety, immutability, writing conversion code for inter-platform communications, and others. So in June 2015 we decided to build a tool both for us and software developers who may have the same issues.