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OrleansContrib/Orleankka

This system is a .NET-based actor framework built on top of Microsoft Orleans, providing a structured approach to building distributed, scalable applications using the actor model. It offers a comprehensive toolkit for managing actor lifecycles, hierarchical state machines, and background jobs, while also supporting HTTP-based RPC and streaming capabilities. The codebase includes a robust test kit for mocking and verifying actor interactions, alongside a collection of samples demonstrating event sourcing, finite state machines, and chat applications.

50.7

Adequate · 3 August 2026

9.3k

lines of production code

C#

primary language

1

bus factor · 31 authors in all

2

measurements over time

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How it got here

2015–2016 · Orleans 9.0 migration and testkit rewrite

The project was updated to target .NET 9.0 and Microsoft Orleans 9.0.1, modernizing the build system and project structure. A major focus was the introduction of strongly-typed actor references, a comprehensive testkit for unit testing, and a refactored runtime supporting hierarchical state machines and middleware pipelines.

12 changes

2017–2018 · Idiomatic alignment and test coverage

This period focused on modernizing the Orleankka framework and its samples to align with current Orleans idioms, particularly the adoption of IGrainWithStringKey and modern HostBuilder patterns. Concurrently, extensive test coverage was added for the core library and test kit, while new samples demonstrated streaming, FSM, and Blazor integration.

20 changes

2019–2021 · Legacy actor runtime and HTTP RPC support

This period focused on introducing a legacy actor runtime with declarative behavior management and state machines. It also added HTTP-based remote procedure call support for actors, enabling HTTP RPC routing and client-side middleware registration. The work was accompanied by comprehensive test coverage for these new features.

9 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 3 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 9713f21efd — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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