EventSourcing

EventSourcing is a small .NET event sourcing framework with runtime packages and compile-time source generators.

The framework stores events, rebuilds aggregate state from event streams and executes projections after successful writes. The source generators keep the mapping, aggregation, repository and projection infrastructure explicit at compile time instead of relying on reflection-heavy runtime discovery.

Packages

Package	Purpose
EventSourcing.Abstractions	Contracts, marker attributes and shared abstractions for domain projects.
EventSourcing	Runtime package with repositories, stores, EF Core integration and dependency injection support.
EventSourcing.SourceGenerators	Source generators, analyzers and code fixes for repositories, mappers, aggregators, projectors and DI extensions.
EventSourcing.Publishers	Shared publisher abstractions for projection-based event publishing.
EventSourcing.Publishers.RabbitMQ	RabbitMQ publisher implementation for events and aggregate state.

Documentation

• Getting Started
• Event Sourcing Concepts
• Benchmarks

Quick Start

Install the runtime and source-generator package in the infrastructure project that declares repositories.

<PackageReference Include="EventSourcing" Version="2.0.0" />
<PackageReference Include="EventSourcing.SourceGenerators" Version="2.0.0" PrivateAssets="all" />

Domain projects usually only need EventSourcing.Abstractions.

<PackageReference Include="EventSourcing.Abstractions" Version="2.0.0" />

Define events and aggregates in the domain layer, declare partial repositories in the infrastructure layer and implement the generated projection classes. The full flow is described in Getting Started.

Build

dotnet restore
dotnet build

Pull request validation builds the solution and runs the non-RabbitMQ test suite. Package publishing is handled separately from pull request validation.