Overview

This is a Demo Project for an E-commerce Microservices Application that demonstrates Event-driven architecture using Kafka.

Specs

The System consists of 3 microservices as shown in the next figure.

• ms-orders: a restful webservice & an orchestrator for the ordering process.
• ms-stock: management of product inventory.
• ms-payments: for payment processing.

Steps to deploy

Deploying Kafka + MYSQL to Docker

First, we'll need to execute the docker compose file in order to initialize the required containers for our environment.

1. mysql
2. kafka-cluster-1
3. kafka-cluster-2
4. zookeeper-1
5. zookeeper-2

run this command in the root directory

docker-compose up -d

The generated containers will have their name prefixed with "ecommerce". In order to list generated containers, run this command:

docker ps --filter "name=ecommerce"

Since we are going to utilize 5 Docker containers which should communicate with each other, we will need to start them on same network.
By default, these containers will be mapped to a generated network named ecommerce_default with a (Bridge) driver.
To list docker networks, run this command to validate.

docker network ls

You can also run this command to inspect this network.

docker network inspect ecommerce_default

To validate containers' ports

docker port {container_name}

Next, we'll create Docker images for our 3 spring-boot apps.

docker build -t ecommerce-orders -f DockerFile .
docker build -t ecommerce-payments -f DockerFile .
docker build -t ecommerce-stock -f DockerFile .

Finally, you can run those images locally (ms-orders is exposed to port 9091).
Alternately, you can use those images with Kubernetes.

Built With

    Java (JDK 11) - The Main Programming Language and Framework.
    Spring Boot - Software Platform for creating and delivering Web Applications.
    Apache Kafka - distributed data streaming platform.
    MySQL - A relational database management system [Optional].
    Docker - A containerization platform.
    Maven - Build tool & Dependency Management.