This repo contains an event-driven demo application built with Quarkus, AMQ Streams (Kafka), and MongoDB. The application can run locally and in OpenShift (Kubernetes.)

The application consists of 4 microservices,:

• Web
• Core
• Kitchen
• Barista

2 projects containing depencies for the microservices,:

• Domain
• Test Utils

and a development utiltiy:

• JSON Service

There is an additional microservice used for testing: Customermock

quarkus-cafe-web

This service hosts the web front end and is the initial entry point for all orders. Orders are sent to a Kafka topic, web-in, where they are picked up by the Core service.

This services listens to the web-updates topic and pushes updates to the web front end.

quarkus-cafe-core

This service orchestrates order related events between event producers and consumers

quarkus-cafe-kitchen

The kitchen services consumes "OrderIn" events, applies the business logic for making the item, and produces, "OrderUp" events

quarkus-cafe-barista

The barista services consumes "OrderIn" events, applies the business logic for making the beverage, and produces, "OrderUp" events

quarkus-cafe-domain

The domain contain shared objects representing the current state of the system's ubiquitous language

quarkus-cafe-test-utils

The test utilities have utilities for spinning up MongoDB and Kafka containers for use in integration tests. It is not part of the production application

quarkus-cafe-json-service

This service is a convenient way to view the JSON objects produced and consumed by the system. It is not part of the production application

Supporting scripts and documentation can be found in the support folder

See Working Locally

• Quarkus Cafe Deployment Options
  • Local Deployment Instructions
  • OpenShift Docker Deployment via Ansible
  • Deployment via Helm Chart
  • Deployment via ACM - Red Hat Advanced Cluster Management for Kubernetes

Landing Page

quarkus cafe topology

kafka topics

This was created in 2020 by Jeremy Davis