Departments and User Profile Microservices

Minimal microservices example demo - using legacy Spring Cloud / Netflix OSS Project.

The project maintains two microservices, the department service and the user profile service. Each user profile can be linked to any department. The User Profile Service allows you to retrieve department data by calling the Department Service REST API and complete the profile data response with department information.

Technology stack

java 21, Maven 3, Spring Boot 2.7, Spring Cloud 2021.0.3 mongo:5.0, mysql:5.7.43, zipkin-slim:2.23.

Including utils: liquibase, WireMock, Mongodb & Mysql testcontainers, docker-compose.dev.yml, micrometer, checkstyle configuration, SpotBugs, PMD etc.

This sample project specifically demonstrates the following features using the Spring Cloud ecosystem.

• Service Registry
• Centralized Configuration
• (Client Side) Load Balancing
• Circuit Breaker pattern

Spring Cloud / Netflix OSS

Service/Feature	Spring Cloud Component	Netflix Component
Service Discovery	Spring Cloud Eureka	Eureka Server Eureka Client
Circuit Breaker	Spring Cloud Hystrix	Hystrix Hystrix Dashboard
Load Balancing	Spring Cloud Load Balancer
Centralized Configuration	Spring Cloud Config Server
Distributed Tracing	Spring Cloud Sleuth Spring Cloud Zipkin

Prerequisites

• Install Docker https://docs.docker.com/get-docker/ - at least 1.6.0
• Add new version of Docker Compose https://docs.docker.com/compose/install/
• Spin-up single instance of MongoDB, MySQL and Zipkin by running command:

docker compose -f compose.yaml up -d

Code conventions

The code follows Google Code Conventions. Code quality is measured by:

• Sonarqube
• PMD
• CheckStyle
• SpotBugs

Tests

This project has standard JUnit tests. To run them execute this command:

./mvnw verify -P use-testcontainers

Versioning

Project uses a three-segment CalVer scheme, with a short year in the major version slot, short month in the minor version slot, and micro/patch version in the third and final slot.

YY.MM.MICRO

1. YY - short year - 6, 16, 106
2. MM - short month - 1, 2 ... 11, 12
3. MICRO - "patch" segment