Java Advanced

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What you'll build

You upgrade the intermediate H2-backed CRUD API into a production-ready Spring Boot application with PostgreSQL, Spring Security JWT auth, Flyway migrations, Docker deployment, Testcontainers integration tests, OpenAPI docs, Redis caching, and GitHub Actions CI/CD.

Prerequisites

• Complete the Intermediate tier (JPA CRUD with H2)
• JDK 21+, Maven 3.9+
• Docker installed

The ladder

1. 01 Why PostgreSQL — from H2 to production database
2. 02 Flyway migrations — versioned schema management
3. 03 Spring Security JWT — login endpoint, bearer token auth
4. 04 Profiles and configuration — dev vs prod with .env
5. 05 Docker and docker-compose — containerize with Postgres
6. 06 Integration tests with Testcontainers — real Postgres in tests
7. 07 OpenAPI documentation — Swagger UI, API docs
8. 08 Redis caching — cache repository results
9. 09 Actuator and health — production monitoring endpoints
10. 10 CI/CD with GitHub Actions — Maven build, test, deploy

Start → 01 Why PostgreSQL