_A modern, JVM-based, full-stack framework for building modular, easily testable microservice applications._micronaut.io Micronaut: A Modern Microservice Framework for the JVM is a new full-stack framework build from the ground by the team officially announced at . It focuses on modularity, minimal memory footprint and startup time which makes it a perfect solution for running on lambda or similar environments. Server written in requires less than one second to start with minimal JAR size of 8 MB. supports Java, Groovy and Kotlin language. Micronaut Grails Greach 2018 AWS Java Micronaut Key things about Micronaut The main advantage of is that there are no runtime penalty for holding metadata for configuration and dependency injection. You can think about as Spring without any runtime reflection. Every information is handled at compile time using Groovy AST transformation or AST processors for Java and Kotlin. uses internal dependency injection module inspired by Spring which leverages the official Micronaut Micronaut Micronaut JSR-330 Context and Dependency Injection annotations. code looks very similar to with enabled. You can write HTTP servers and HTTP clients with seamless load balancing. There is out-of-box support for service discovery, Hystrix, trace logging, caching, fault tolerance and circuit breaker pattern. Reactive Streams support is integral part of the framework so your controllers and clients can use for example RxJava 2 objects for input and output such as . Micronaut Spring Boot Spring Cloud Single<MyObject> Controller Example @Controller("/") class HelloController { @Get("/hello/{name}") String hello(String name) { return "Hello $name" } } Client Example @Client("/") interface HelloClient {@Get('/hello/{name}') Single<String> hello(String name)} Fallback Client Example @Fallback class HelloFallbackClient {Single<String> hello(String name) {return Single.just("Hello fallback $name")}} Similar to you can declare your own beans using annotation. It also shares the configuration properties with . You can even use environment property for backend compatibility. You can use environment-specific properties for example for deployment to AWS. Spring Boot auto-configurable @Requires Spring Boot SPRING_APPLICATION_JSON application-aws.yml shares some of the parts with Grails — you will be able to use for example GORM from within your microservice. Micronaut Micronaut is not available to public yet. The release is planned in Q2 2018 which means it will be probably released at , which will also host talks dedicated to this new framework. Companies interested to try may ask for beta access. Micronaut Gr8Conf EU Micronaut OCI You can see more details about Micronaut in following slides by : Álvaro Sánchez-Mariscal Edit: First milestone of Micronaut has been released at Gr8Conf EU as expected. Visit the download section to get started. Preferred option is to use SDKMAN! : curl -s https://get.sdkman.io | bashsource "$HOME/.sdkman/bin/sdkman-init.sh"sdk install micronautmn -version The documentation is already very comprehensive: _In addition, with Micronaut your application startup time and memory consumption is not bound to the size of your…_docs.micronaut.io Micronaut There are also several guides available already: _A modern, JVM-based, full-stack framework for building modular, easily testable microservice applications._guides.micronaut.io Micronaut: A Modern Microservice Framework for the JVM
