Hackathon Java API

Code challenge to create an API using Java.

Architecture

The API's implementation was divided in 4 phases:

• 1. Create the services: Product, Customer and Order
• 2. Add service discovery, centralised configuration and load balancer (client-side)
• 3. Create api gateway and a authentication service
• 4. Configure and collect metrics and tracing from all services

Technologies

All services are based on Spring Boot and Spring Cloud.

Service discovery uses Netflix Eureka.

Client-side Load Balancer uses Netflix Ribbon.

Metrics will be stored into Prometheus and tracing into Zipkin.

There's a very simple presention about this project.

To Do List / Improvements

• Add initial services: Product, Customer and Order
• Add some tests to all services
• Create a service discovery service
• Change order service to call the customer service using client-side load balancing
• Create initial version of auth service
• Finish the API
• Add some kind of documentation (Swagger)
• Add more tests
• Add centralised configuration service
• Create API Gateway
• Finish auth service, and add tests to it
• Configure metrics on all services
• Configure tracing on all services

How to run

To install, clone this repository:

git clone https://github.com/rlazoti/hackathon-java-api
cd hackathon-java-api
mvn clean package

After that, run the services using the folowing commands:

java -jar eureka-service/target/eureka-service-1.0.0.jar
java -jar customer-service/target/customer-service-1.0.0.jar
java -jar order-service/target/order-service-1.0.0.jar
java -jar product-service/target/product-service-1.0.0.jar

To open Eureka, access: http://localhost:8761/

Example of requests to some services:

curl -v http://localhost:8080/api/v1/Customer/1
curl -v http://localhost:8082/api/v1/Order/1

Author

-Rodrigo Lazoti