Subscription application using ZIO

This is a simple application that manages subscriptions requests:

• Saves the subscription state in a database.
• Notify about subscription changes in Kafka.

My idea is just to learn more about ZIO, I'm using as a guideline zio-petclinic

This app uses:

• ZIO Http for the HTTP server
• Tapir ZIO for endpoints and endpoint documentation
• ZIO JSON for JSON serialization
• ZIO Quill for SQL queries
• ZIO Config for app configuration and documentation
• Iron for refined types

Run the application

1. Start the services

   docker compose -f docker/docker-compose.yaml up -d

2. Start sbt

   sbt

3. Inside sbt, start the application

   reStart

4. Visit the swagger page to list the endpoints

   http://localhost:8080/docs

5. Inside sbt, stop the application

   reStop

Once the application starts you can send requests to create/delete/update subscriptions and Kafka messages will be produced, in those cases, in a topic called subscriptions notifying the changes, you can check those messages with tools like kcat:

kcat -C -b localhost:29092 -t subscriptions