Skip to content
CAI
Produce a survey ↗Verify a survey

BranislavLazic/akka-cqrs-activator

This system is a demonstration application built on Akka that implements a CQRS and event sourcing architecture. It manages the full lifecycle of issues—creation, updating, closing, and deletion—by persisting state changes as events to a Cassandra backend. The system exposes these operations through an HTTP API and a React-based frontend, utilizing Server-Sent Events for real-time updates.

38.6

Weak · 4 August 2026

1.4k

lines of production code

Scala

with JavaScript

1

bus factor · 5 authors in all

3

measurements over time

CAI band scale
CAI trend line

How it got here

2017 · Initial CQRS and Event Sourcing implementation

The project was initialized as an Akka-based CQRS and event sourcing demonstration, establishing the core architecture with a React frontend, Akka HTTP API, and Cassandra backend. This period focused on setting up the foundational infrastructure, including configuration for Akka Persistence, Cassandra schema definitions, and test resources, while also refining the build system and dependencies.

8 changes

2018–2020 · Issue management implementation

This period focused on implementing full issue management capabilities across the stack, including a React-based UI, an HTTP API with date filtering, and a write-side architecture with validation. The backend was updated to use Avro serialization and Cassandra for read models, while tests were added to cover the new routes, validators, and repository behaviors.

6 changes

CAI lens gauges

Survey your own repository

BranislavLazic/akka-cqrs-activator was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point the surveyor at a repository you know and see whether you agree with it.

Survey a repository

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 4 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 2a8bab1cce — 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.
CAI link cards