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ProductContext-EventSourcing

A practical/experimental Event Sourcing application on Product Bounded Context in an e-commerce

Purpose

I wanted to implement what i learnt about DDD CQRS and EventSourcing, that's why i created this repository. I will add new things to here by time as i learn.

Dependencies

EventStore and Docker will be organized by docker-compose.yml

Libraries

How

Repository contains a docker-compose.yml file which provides all dependencies for bootstrapping and developing.

docker-compose up

You can run tests afterwards.

Domain Model

StoryStream is used for Event Storming while modeling domain model.

Domain model basically provides a Product which has a Color (Content) and it's Variants.

Project Structure

Solution has 3 main projects. These projects are:

  • ProductContext.WebApi
  • ProductContext.Domain
  • ProductContext.Framework

ProductContext.WebApi

  • Uses Swagger for documentation
  • Has a ProductCommandsApi as controller
  • Uses Mediator for sending commands to handler

ProductContext.Domain

  • Events and Commands sit here.
AggregateRoot Entities ValueObjects Documents
Product ProductContent ProductContentId ProductContentDocument
ProductVariant ProductVariantId ProductVariantDocument
ProductId ProductDocument
ProductContentVariantValue
ProductVariantTypeValue
VariantTypeValue VariantTypeValueId Not yet implemented

Product is a Snapshotable aggregate root.

ProductContext.Framework

  • Snapshotting with AsyncSnapshotableRepository<TAggregateRoot>
  • Tracking last projection status with CouchbaseCheckpointStore
  • Now, GetStreamName, GetSnapshotStreamName delegates for creating proper stream Ids
  • ProjectionManager runs the Projections and every event fall into Projac projection handler.

Deploy

  • Kubernetes

    • minikube start
    • eval $(minikube docker-env) switch to kubernetes local registry your current terminal context
    • docker ps #see what's going on kubernetes local registry
    • docker build -t productcontextes .
  • Helm

    • Switch to /deployments
    • helm package productcontext --debug
    • helm install productcontext

To Be Implemented

  • Correlation/Causation Id

Notes

What brings you here of course not unique. I inspired a lot from WorkshopEventSourcing