# Micronaut course

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## Learning sessions log

Session 1 : 04/11/2022

Daniel - Instructor for the course

Living in Austria - working at technical lead with backend applications. Deploying to aws.

Goal for this course: following it for 45min/day.



## Unit 1 : Introduction

### Spring / Micronaut / Quarkus (09/2020)



Spring - dominating the Java world

- well established
- reactive stack with Spring WebFlux (since v5)
- biggest community
- most integrations
- multi language support
- heavy use of reflection
- support for GraalVM (beta)



Quarkus - cloud native framework

- reactive stack
- minimal memory footprint at startup time
- based on standards and frameworks
- GraalVM / serverless cloud functions
- slower compilation time (AOT)
- smaller community as Spring



**Micronaut** - modern cloud native framework

- reactive stack
- minimal footprint and startup time
- no byte code modidications during compilation
- removes all leves of reflection usage
- GraalVM / serverless cloud functions
- multi language support (Java, Groovy, Kotlin)
- quite similar to Spring framework (good if you have spring background)
- slower compilation time (AOT)
- smaller community as Spring



### Code examples and setup

*Course is compatible with version 3.1*



## Unit 2: Micronaut 3 - quickstart

Cf. https://micronaut.io and https://micronaut.io/launch

Create a first project with:

- Micronaut 3 LTS
- Java 11
- Maven
- Junit

Dependancies: `Netty server`