Welcome to the ultimate Micronaut tutorial on kscodes.com — your one-stop guide to learning everything about the powerful, modern, and lightweight JVM framework for building microservices, serverless applications, and reactive APIs. Whether you’re a Java developer exploring microservice frameworks beyond Spring Boot, or a beginner curious about building fast and scalable backends, Micronaut offers a fresh, high-performance alternative with minimal runtime overhead.
This tutorial starts from the very basics — what Micronaut is, how to install it, and how to build your first application — and gradually walks you through real-world examples like REST APIs, database access, testing, and security. You’ll also explore advanced topics like GraalVM native images, reactive programming, and cloud-native deployment.
No matter your experience level, this hands-on guide will help you build production-ready Micronaut applications with confidence.
Let’s dive in and unlock the full potential of Micronaut! 💡
🔰 Getting Started with Micronaut
- What is Micronaut? Introduction and Core Features
- Installing Micronaut CLI and Setting Up Your First Project
- Creating Your First Micronaut Application
- Understanding Project Structure in Micronaut
- Hello World: Building and Running Your First Endpoint
- Micronaut vs Spring Boot: Key Differences for Beginners
- Dependency Injection in Micronaut: How it works
- Using Micronaut with Java 21
- Micronaut with VS Code: Recommended Setup
- Building REST API in Micronaut (Banking App Example)
📡 HTTP, Controllers, and Routing
- Creating REST Endpoints with @Controller and @Get/@Post
- Path Parameters and Query Parameters in Micronaut
- Returning JSON from REST Endpoints
- Consuming External APIs in Micronaut using @Client and @Get
- Handling HTTP Errors and Custom Error Pages
🗃️ Data Access & Persistence
- Introduction to Micronaut Data
- Setting Up a Micronaut App with H2 / PostgreSQL / MySQL
- Defining Entities and Repositories in Micronaut
- Writing Queries with Micronaut Data: Finder Methods
- Using JPA or JDBC in Micronaut
- Flyway or Liquibase Integration in Micronaut for DB Migrations
🧪 Testing
- Unit Testing Controllers and Services in Micronaut
- Writing Integration Tests with Embedded Server
- Micronaut testing with mock beans and clients
🔐 Security
- Micronaut Security Basics
- JWT Authentication with Micronaut
- Role-Based Access Control in Micronaut
- Secure Configuration: Storing Secrets and Environment Variables
☁️ Cloud-Native Features
- Micronaut and GraalVM Native Image Compilation
- Deploying Micronaut to Docker
- Deploying Micronaut on AWS Lambda
- Using Micronaut with Kubernetes (K8s)
- Micronaut and Micrometer: Metrics and Monitoring
🧠 Advanced Concepts for Beginners
- AOP in Micronaut: Introduction to @Around and Interceptors
- Custom Configuration and Property Injection
- Scheduling Tasks with @Scheduled
- Creating Custom Annotations and Qualifiers
- Event Publishing and Handling in Micronaut
- Working with Reactive Programming (RxJava / Reactor)
- Building a Complete CRUD Application with Micronaut
✅ Conclusion
Micronaut is more than just a microservice framework — it’s a powerful, lightweight, and reactive-ready toolkit designed to simplify modern application development. Through this comprehensive Micronaut tutorial, you’ve explored everything from basic setup and HTTP routing to data persistence, testing, and advanced features like AOP, JWT security, and cloud-native deployments with Docker, Kubernetes, and AWS Lambda.
Whether you’re building REST APIs, securing applications, integrating databases, or compiling native images with GraalVM, Micronaut provides the speed, flexibility, and modularity to deliver high-performance Java applications with ease.
Ready to build your next microservice or cloud-native app with Micronaut? Keep experimenting, dig deeper into its ecosystem, and don’t forget to bookmark kscodes.com for more developer-friendly guides and tutorials.