Kotlin
Idiomatic Kotlin Microservices
A live coding session on how to go pure Kotlin with microservices
Although Kotlin is, from a language perspective, 100% interoperable with Java, due to the slight paradigm shift (nullability) there might be some pain when using Java frameworks, e.g.: the need of private var lateinit when using JUnit, having to use compiler plugins to open up Spring annotated beans or a generated zero-arg constructor for Hibernate.
This talk goes through a full fledged alternative to the common Java stack when writing microservices, using: Ktor (Web framework), Kodein (DI container), Exposed (SQL library), Spek (test framework), Gradle Kotlin DSL, ...
This live coding session aims to share my experiences on how to combine (and how not to combine!) several open source libraries into a maintainable, scalable, sustainable, and all the other xxx-ables you can think of... based on several years of experience using Kotlin in production in different companies. Using libraries written from scratch for Kotlin enables us to fully make use of this beautiful language. Its functional nature, extension function types, null type safety, delegated properties; its preference for immutability and simply the feeling of writing proper, idiomatic Kotlin. The demo itself will cover a basic CRUD web service, following a TDD approach resulting in a production ready artifact.
The target audience are primarily developers/architects and requires basic knowledge of the language (intermediate level) and preferably some experience with the existing Java ecosystem.
Additional information
| Type | devroom |
|---|
More sessions
| 2/2/20 |
Welcoming participants to the first edition of the Kotlin DevRoom @ FOSDEM
|
| 2/2/20 |
Kotlin Coroutines are a great match for implementing common features in Android applications. In this presentation, we will go through a number of patterns that solves the pattern we often encounter when implementing traditional asynchronous features.
|
| 2/2/20 |
FOSDEM Companion is currently the most used mobile application at FOSDEM. It has been around since 2014 and is updated every year. In 2020, it's finally made the big leap to Kotlin!
|
| 2/2/20 |
From git housekeeping to releasing. From keeping a sane backlog to handling internationalization and monitoring status, the life of a developer involves more than meets the eye. This talk will be a feedback about how we use Kotlin extensively to: automate the dev workflows with command-line apps on dev machines. achieve CI independence with kotlin runners on CI machines. run Kotlin on the server using the gradle appengine plugin. ditch bash and perl and use kscript instead. That's a lot to cover ...
|
| 2/2/20 |
Presentation of Kotlin Coroutines, a great new framework for asynchronism which makes it more powerfull and easier to manage. Please note that this talk replaces one entitled "Experimenting with the Kotlin Compiler" that was due to have been given by Jossi Wolf, who has sent his apologies but is now unable to attend as he has fallen ill. We wish him a speedy recovery.
|
| 2/2/20 |
Coroutines are great, I think we all agree on that. But as the async, and possibly parallel, programming becomes easier the risk of sharing mutable variables between coroutines arises. When the boundaries are abstracted away we should rely on safe ways to communicate between our coroutines. In this session, I will go through safe and unsafe ways of communication between different coroutines, and why it's not safe to think of them purely as threads.
|
| 2/2/20 |
Creating modern games in Kotlin forces you to use non-object oriented graphic languages and getting your hand dirty with native resource managemente. With wrappers around OpenGL and Vulkan, we make powerful graphics familiar to jvm devs and type-safe.
|
