DynamoDB as EventStore

I would like to share with you how I managed to deploy a solution to store Domain Events in DynamoDB in 2 days (and mostly because of AWS permission issues...😅).

I wanted a solution to store how the user interacted with different Domain Models and decouple that storage from the monolithic so they can grow independently. I aimed to create something super simple, or at least not that complex, in 2 to 3 days.

I wanted to process events as:

Monolith sends message to ➡️ SQS ➡️ Triggers Lambda to store it into ➡️ DynamoDB Table

Even though DynamoDB might not be an optimal solution to be used as Event Store, I have given it a try for the next reasons:

• It is fully managed by AWS

• It is cheap enough

• We don't require high write throughput nor read for the moment.

• Able to encrypt the content

Implementation

I decided to go with:

• Terraform as Infrastructure as Code

• Python for AWS Lambda

You can find the source code here 😊

Ready to be deployed into your cloud solution 💪😁