Learn QUARKUS with Real Code Examples

Built on Java and GraalVM

CDI-based dependency injection

Reactive programming with Mutiny

REST endpoints with JAX-RS

Modular extensions for integration with DB, Kafka, etc.

Client sends HTTP request -> Quarkus app

CDI beans and extensions process request

Endpoint handles business logic (reactive or imperative)

Response serialized to JSON or other formats

Response sent back to client

CDI dependency injection

Reactive programming with Mutiny

REST endpoints with JAX-RS

Modular extensions for integrations

Cloud-native deployment patterns

Cloud-native microservices

Reactive backend for IoT apps

Serverless functions

Event-driven messaging systems

Kubernetes/OpenShift-based applications

Cloud-native and container-first

Fast startup and low memory footprint

Reactive-first programming model

Developer productivity via live reload

Extensible via modular extensions

Use reactive endpoints for high concurrency

Deploy multiple instances in Kubernetes/OpenShift

Leverage native images for fast scaling

Cache data and use messaging systems for decoupling

Monitor performance via metrics extensions

Migrate from Spring Boot using Quarkus extensions

Rewrite REST endpoints using JAX-RS

Replace Spring Beans with CDI Beans

Adapt reactive programming where applicable

Test thoroughly for GraalVM native image compatibility