kotlinlang #server

For me the 2 approach are quite different. For what I understand spring-fu is more a DSL using the builder pattern to simplify spring configuration and get rid of annotations. In the case of ktor, the lambda are executed in the request pipeline. It’s more than just configuration.

2 replies · 3 participants

napperley

06/10/2018, 6:38 AM

The Fn Project (a open source Serverless platform) has recently added Kotlin support:

https://youtu.be/rVcT_N8w4II?t=1903▾

7 replies · 2 participants

Hamza

06/11/2018, 4:13 AM

hey guys, how can i make a GET endpoint for something like

/book/1

/book/2

, or

/book/N

for any N number? I am using Javalin

3 replies · 2 participants

gregopet

06/11/2018, 7:34 AM

Unfortunately it doesn't support Kotlin directly, but with what you usually do in templates it mostly means calling

.getProperty()

instead of

.property

which I can totally live with

2 replies · 2 participants

Hamza

06/11/2018, 8:53 AM

is there a function which can be called on shutdown? To represent when the app is closing?

5 replies · 3 participants

06/12/2018, 1:07 AM

There probably aren’t too many kotlin + spring boot users out there, so you may well be in uncharted waters.

36 replies · 2 participants

amanda.hinchman-dominguez

06/12/2018, 1:53 AM

@dave08 I really like your idea of testing for behavior, not frameworks. I will definitely need to take a step back tonight on testing so I can think of a more objective way of testing APIs without stumbling over ridiculous issues like these

5 replies · 3 participants

poohbar

06/12/2018, 2:43 PM

Spring Boot is now reactive too with webflux or Spring Fu

10 replies · 5 participants

vincent.brule

06/13/2018, 12:23 PM

Hello. I don’t know if I’m in the good channel. I would know if anyone can help me for Ktor unit tests using Hoverfly ? Thanks 🙂

2 replies · 2 participants

amanda.hinchman-dominguez

06/15/2018, 4:13 PM

@Kenneth Spring boot is definitely overkill, and I've personally found extreme blocks for the simplest versions for things like authentication security, testing via Mockito, deploying with Docker etc. Not saying it's impossible, but I should have to struggle for 3 hours trying to make it work together per issue

24 replies · 8 participants

brabo-hi

06/15/2018, 10:19 PM

Hi guys i have a question : why using vertx ?

8 replies · 4 participants

poohbar

06/17/2018, 11:42 PM

I don't think Spring Boot is overkill for anything really. It has been designed for microservices so it's meant to run tiny services with just a few classes. Of course I am not saying you have to use Spring Boot.

1 reply · 2 participants

amanda.hinchman-dominguez

06/18/2018, 12:18 AM

@poohbar I finally got time tonight have you worked with Spring Boot and Kotlin by any chance? I'm pretty sure the issues I am having are Kotlin-related issues

1 reply · 2 participants

poohbar

06/18/2018, 12:21 PM

Of course if you never needed the stuff in Spring Boot you are better off with a lightweight framework. The question is what do you do when you need the stuff. And Spring Boot has answer for pretty much any server-side need. I really like how autoconfiguration works for example.

☝️ 2

👍 4

2 replies · 2 participants

amanda.hinchman-dominguez

06/19/2018, 2:41 AM

I'm cutting out docker for the time being just to have one variable at a time solving the deployment issue. It works fine on localhost, but seems to be a different story on heroku for spring and kotlin

6 replies · 3 participants

amanda.hinchman-dominguez

06/19/2018, 11:40 AM

@pike KTOR is probably recommended - I did not start my project using it though, maybe later on I'll transfer it over

23 replies · 6 participants

Albert

06/19/2018, 1:55 PM

Anyone here got experience with a Kotlin parser, similar what JavaParser does for Java?

2 replies · 2 participants

Hamza

06/20/2018, 4:12 AM

hey everyone 👋. Does anyone know a way (using kotlinx.html) to make a method that returns a html element? I can’t just do

fun DIV.foo() = form {}

as it returns Unit

10 replies · 3 participants

Bart.K

06/20/2018, 11:11 AM

How does .count() operation work on Sequences? Does it aggregate all elements going through the sequence and then counts them all at the end very much like .size() in Collections or is it just a counter that increments with each element? I have a potentially infinite/very long sequence and started wondering if this could lead to memory issues at some point down the line.

2 replies · 2 participants

sdeleuze

06/20/2018, 3:33 PM

https://twitter.com/sdeleuze/status/1009458696408256513

👍 1

⏩ 1

1 reply · 2 participants

Hamza

06/21/2018, 6:48 AM

not sure how to implement it

66 replies · 6 participants

06/22/2018, 11:56 PM

Retrofit would be a good level of abstraction

2 replies · 2 participants

06/22/2018, 11:57 PM

In my common modules I have a Retrofit interface which I manually implement for JS and then use Retrofit on JVM

2 replies · 2 participants

jdemeulenaere

06/23/2018, 10:35 AM

@Nikky I started to work on a project called kRPC (similar to gRPC, but fully kotlin) that would scan kotlin interfaces and @Serializable data classes (instead of protobuf messages and services definitions) and generate multipaltform implementations of those interfaces using HTTP RPC calls behind the scene. Unfortunately I stopped working on that given that it's quite difficult to generate anything from common Kotlin code. AFAIK the only way to generate code is to either use java annotation processing (but then it requires your project to be a Kotlin/JVM project) or create a compiler plugin which is not a trivial task and for which the API is not documented or stable. I'm secretly hoping that JB will release something that could help us do that kind of metaprogramming soon 🙂

1 reply · 2 participants

Hamza

06/27/2018, 3:43 AM

any good resources on using mvc format with kotlin? My current code style is ummm… ^_^

14 replies · 6 participants

Title

Hamza

06/27/2018, 3:43 AM

any good resources on using mvc format with kotlin? My current code style is ummm… ^_^

gildor

06/27/2018, 3:56 AM

mvc format?

Hamza

06/27/2018, 3:56 AM

yeah. someone told me about that

gildor

06/27/2018, 3:58 AM

i know what is MVC but what do you mean “format” or “mvc format”. Also you mentioned code style and I’m confused %)

Hamza

06/27/2018, 3:59 AM

oh, i guess just MVC then. not sure how it would work with Kotlin though. most of it is on asp.net whenever i try to look

amanda.hinchman-dominguez

06/27/2018, 4:04 AM

@Hamza it depends on the framework you use, of course. MVC is simply one of many architectural solutions based on a recommended design by many. For example, #tornadofx allows you to use any MV* you wish and has good documentation. In terms of MVC itself, I wouldn't tie that with Kotlin. I would highly recommend reading any explanation of MVC

Hamza

06/27/2018, 4:05 AM

oh, okay. any ideas what code style i should use with something like ktor or javalin? Where you get GET requests and POST requests with a context.

amanda.hinchman-dominguez

06/27/2018, 4:09 AM

ktor/javalin isn't necessarily a coding style, it's more of different approaches to server-side solutions with its own focuses on aspects of pipelining. ktor looks really cool and to me, reminds me a lot of Go with routing. You create your own GET and POST requests.

tipsy

06/27/2018, 7:29 AM

@Hamza i know you don't like hearing it, but life is easier if you use javascript and MVVM. use vue/react for your frontend, then javalin/ktor for your backend. make all communication JSON.

Hamza

06/27/2018, 7:58 AM

😞. okay. i’ll check it out

david-wg2

06/27/2018, 8:27 AM

I recommend vue, it's a lot easier to get started with

Juan Guillermo Gomez - GDG Cali - GDE Firebase

06/27/2018, 6:47 PM

I did an example with clean architecture for server side and kotlin

https://github.com/jggomez/KotlinAPI_MAVEN

MVC is a pattern, Clean architecture is a architecture style

https://speakerdeck.com/jggomez/kotlin-for-server-side

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