Introduction

This is a sample implementation of CQRS / Eventsourcing Infrastructure in node.js using:

• redis for Pub/Sub and Storage.
• node-eventstore for EventSourcing including its redis storage implementation.
• backbone.CQRS to bring CQRS to client with ease.

get it up and running

1. start redis server

   cd redis-x.x.x
   // make
   ./src/redis-server
   

2. start server in host and domain folder

   node server.js
   

3. direct your browser to

   http://localhost:3000
   

the source code is well documented to understand the core principles.

why should i care?

• Clarified CQRS - Udi Dahan
• Top 10 Reasons to do CQRS - Rinat Abdullin

got the sample - where to go now?

As of today i know of three implementations for doing (D)DDD / CQRS in node.js. Building a codebase for production is a whole different thing to doing a little show case / demo code. If it can break - it will break.

adrai's modules

This modules are the result of open sourcing parts of a large reallife project of a distributed system based on the principle of DDDD and CQRS. It's gone through a lot of iterations and should address most pitfalls.

• you could find this sample done with adrai's framework at adrai's cqrs-sample

The API is designed well so you can focus on the domain without worring to much about the infrastructure.

• domain
• eventdenormalizing
• viewmodel, read/write repository
• eventstore
• proper dequeing
• business-rules and validation

• message bus

• without distributing

Documentation can be found here

petrjanda's module

Framework for non distributed system using couchDb as storage.

• CQRS Framework

efacilitation's module

Build web applications based on Domain-driven Design and Layered Architecture.

• eventric

complete list can be found under node modules

Which one to choose?

1. If your project is simple enough to be implemented in a traditional way - go for the traditional approach

2. If your project really profits from doing DDDD / CQRS it might be a good idea to create your own codebase (it's not to complicated, and compared to the overall project size worth the effort as it's the core of your distributed system)

3. If you need to get fast results and more than a sample - i would try adrai's modules.