Quarkus From Zero

Learn the cloud-native Java framework built for fast startup and low memory: why Quarkus moves work to build time, its loved dev mode, REST APIs, build-time CDI, Hibernate with Panache, configuration, reactive programming with Mutiny, testing, and compiling to a native executable. The standards you know, made supersonic.

1. What Quarkus Is & Why It's Fast Quarkus is a cloud-native Java framework that moves framework wiring from startup to build time, so apps boot in milliseconds, use little memory, and can compile to native machine code.
2. Dev Mode & the Developer Experience Quarkus's signature: live reload that recompiles on the next request, a built-in Dev UI, continuous testing, and Dev Services that auto-start throwaway databases - the fast feedback loop teams fall in love with.
3. Building REST APIs Expose a Product over HTTP with Quarkus REST (RESTEasy Reactive): the standard JAX-RS annotations, path and query params, JSON request bodies via the rest-jackson extension, RestResponse for status codes, and the imperative-vs-reactive choice.
4. CDI in Quarkus (ArC) Quarkus's DI container is ArC: the same CDI standard - @Inject, @ApplicationScoped - but the wiring graph is computed at build time, which is what makes fast boot and native images possible.
5. Persistence: Hibernate with Panache Panache is a thin Quarkus layer over Hibernate ORM that strips the boilerplate. Learn active-record and repository patterns, simplified queries, transactions, and zero-config Dev Services databases.
6. Configuration How Quarkus externalizes config with MicroProfile: application.properties, @ConfigProperty, type-safe @ConfigMapping, dev/test/prod profiles, source precedence, and the build-time vs runtime trap unique to Quarkus.
7. Reactive Quarkus with Mutiny Demystifies reactive Quarkus: why non-blocking exists, Mutiny's Uni and Multi, building reactive pipelines and endpoints with reactive Panache, and the clear-eyed verdict on when reactive earns its complexity versus plain imperative.
8. Testing Quarkus Apps @QuarkusTest boots a real app fast enough to lean on, REST Assured asserts the HTTP contract, Dev Services hands tests a real database, and @QuarkusIntegrationTest runs the suite against the native binary.
9. Native Compilation & Containers How Quarkus compiles your Product service to a standalone native executable with GraalVM, why build-time wiring makes that possible, the reflection gotcha, and packaging tiny containers for Kubernetes.
10. Production & Where to Go Next You can build a fast Quarkus service and know why it's fast. Here's the production essentials - health, metrics, tracing, Kubernetes - the extension ecosystem, a clear-eyed look at the field, and what to build next.