Micronaut Guide

Applies to: Micronaut 4.x, Java 21+, Microservices, Serverless, CLI Applications, IoT

Core Principles

1. Compile-Time DI: All dependency injection resolved at compile time -- no reflection at runtime
2. GraalVM Native: First-class native image support for fast startup and low memory
3. Reactive by Default: Built-in reactive programming with non-blocking I/O
4. Cloud-Native: Service discovery, distributed tracing, config management out of the box
5. Fast Startup: Sub-100ms startup makes it ideal for serverless and containers
6. Standard Library: Use jakarta.inject annotations, not Spring-specific ones

Guardrails

Dependency Injection