Micronaut Framework

Micronaut Framework is a modern, JVM-based, full stack Java framework designed for building modular, easily testable JVM applications with support for Java, Kotlin and the Groovy language.

The Micronaut framework was originally created by a team who had also worked on the Grails framework. The Micronaut framework takes inspiration from lessons learned over the years building real-world applications from monoliths to microservices using Spring, Spring Boot and the Grails framework. The core team continues to develop and maintain the Micronaut project through the support of the Micronaut Foundation.

Micronaut Framework aims to provide all the tools necessary to build JVM applications including:

• Dependency Injection and Inversion of Control (IoC)
• Aspect Oriented Programming (AOP)
• Sensible Defaults and Auto-Configuration

With Micronaut Framework you can build Message-Driven Applications, Command Line Applications, HTTP Servers and more whilst for Microservices in particular Micronaut Framework also provides:

• Distributed Configuration
• Service Discovery
• HTTP Routing
• Client-Side Load Balancing

At the same time Micronaut Framework aims to avoid the downsides of frameworks like Spring, Spring Boot and Grails by providing:

• Fast startup time
• Reduced memory footprint
• Minimal use of reflection
• Minimal use of proxies
• No runtime bytecode generation
• Easy Unit Testing

This is achieved by pre-computing the framework infrastructure at compilation time which reduces the logic required at runtime for the application to work.

For more information on using Micronaut Framework see the documentation at micronaut.io

Example Applications

Example Micronaut Framework applications can be found in the Examples repository

Building From Source

To build from source checkout the code and run:

./gradlew publishToMavenLocal

To build the documentation run ./gradlew docs. The documentation is built to build/docs/index.html.

Contributing Code

If you wish to contribute to the development of Micronaut Framework please read the CONTRIBUTING.md

Versioning

Micronaut Framework uses Semantic Versioning 2.0.0. To understand what that means, please see the specification documentation. Exclusions to Micronaut Framework's public API include any classes annotated with @Experimental or @Internal, which reside in the io.micronaut.core.annotation package.