So, let's say I want to write a lightweight server with a REST API in Kotlin. Which framework/libraries would you guys recommend? I guess I could use the JS backend and Kotlin, but I'm curious if there is any other alternatives.

Anyone having a thought of using the combination of ReactJS/ReactNative and kotlin?

Hey! Today myself and @dave have released http4k: https://github.com/http4k/http4k

@juliocbcotta language: Kotlin HTTP endpoints: Spring Boot (Spring Web MVC) HTTP security: Spring Boot (Spring Security) dependency injection: Spring Boot persistence: Exposed https://github.com/JetBrains/Exposed HTTP requests to other services: OkHttp http://square.github.io/okhttp/ end-to-end tests: Spring Boot with the whole app started, HTTP requests with OkHttp with Kotson for Kotlin-friendly JSON creation

I've ben using Spark with kotlin for a couple months know and works realy fine. However I do not agree with the route system and because of that I've implement a diferent route system over the framework routes. If you try Use Spark you will end up with endpoints like:

post("/endpoint", {request, response ->  <http://someController.post|someController.post>(request, response)})
get("/endpoint", {request, response ->  someController.get(request, response)})
put("/endpoint", {request, response ->  someController.put(request, response)})
delete("/endpoint", {request, response ->  someController.delete(request, response)})

The change that I made in my project allows me to implement endpoints like this:

route("/endpoint")
    .get { request, response -> someController.get(request, response) }
    .post { request, response -> <http://someController.post|someController.post>(request, response) }
    .put { request, response -> someController.put(request, response) }
    .delete { request, response -> someController.delete(request, response) }

And if you have a path at you url you I can do something like:

route("/users")
    .post { request, response -> <http://userController.post|userController.post>(request, response) }
    .post("/signin", { request, response -> userController.signin(request, response) })
    .post("/signout", { request, response -> userController.signout(request, response) })

You can do the same with Spark routes but you will have to write a little more code and for me this "node like" endpoint implementation works better.

Hi guys, I’m having 5 years experience in Android and want to start develop backend 🙂 Can you recommend some learning materials (git example code, courses, books)? I would like to be able to create API for my project.

@dave Kovert is moving on top of KTOR which will mean it'll be hosted by anything that hosts KTOR, and will still support vert.x

I've worked a lot with Spring Boot and Groovy and I chose a more lightweight library for my current Kotlin project (and I really don't miss Spring 🙂 )

#ktor would be better for specifics

jooq. jdbi. spring's jdbc-template

Well as far as JOOQ costs go. I do work for a Fortune 500 company. That being said companies at that level think about IBM, Microsoft, Oracle, etc when they think about paying for something. So justifying costs especially if your product is in maintenance mode can be very difficult. I need to check the licensing details for CE edition, but I suspect writing your own SQLServer support to hook into CE will probably not go against the license.

@vonox7 thanks! but when you get the userId, what do you do next? Do you build up an associated

AuthenticatedUser

instance from database and keep it around for the duration of HttpRequest?

Hi all. Don't know if this is the right channel, but I have just released a new lib that implement a kotlin DSL for MongoDB aggregation pipeline

Next use-cases topic: DI/IoC. Do you use them? Which one? Pros, cons, issues, benefits?

We use Spring, Guice and nothing depending on who kicked off the project. I prefer nothing and pass dependencies via constructors. Guice is a close second - it actually has modules and sticks to DI. I would never use Spring by choice - it's like having a global map configured by random classpath scans, XML fragments, property files with a dash of its own expression language

title says scala. page says kotlin. 😕

For anyone who is in London and interested, @s4nchez and I will be giving a talk about the design decisions and development of http4k and how it's changed our dev and testing practices, at the next Kotlin London meetup. Details here: https://www.meetup.com/kotlin-london/events/241918493/

Anyone knows if it is possible to combine a routing for all HTTP verbs in ktor? Like a combined

get("/")

and

post("/")

?

@tipsy The extension property concept is interesting - not really seen that done before 🙂 After a brief look, a couple of things spring out: 1. The ApiBuilder class now has 4 methods for each HTTP verb - one for various combinations of the path/Handler/Role list. This seems like as a possible problem going forward - eg. will the next concept introduced into the API builder result in 8 methods per HTTP verb? If you could find a way to combine the behavioural changes into a decorated implementation of the Handler interface then the ApiBuilder contract could stay simple. so maybe you'd call

get(roles(UserController::getAllUserIds, ApiRole.ANYONE))

instead - where the

roles()

method returns another Handler. 2. There's a type in your tutorial - should

this.header("Basic")

be

this.header("Authorization")

?

Hey guys, not sure if this fits this channel but maybe you can help me with some issue. I have a reporting application that runs some heavy mysql queries, to make it faster I want them to run in parallel but as I see Jdbc is not parallel so in order to do it I would need a thread pool and a connection pool. Is this the way of doing it or is there a library that will make my life easier?

@dave @s4nchez Great slides indeed. Any example or hints about how to shrink uberjar with ProGuard for server-side use case ?

what do you all think about this syntax for getting header-values?

val accept = request.headers.accept
val cacheControl = request.headers.cacheControl
val username = request.headers.authorization.basic.username
val password = request.headers.authorization.basic.password

Guys, so...currently I have a couple of API that run on wildfly (same domain) my doubt is how to deploy a couple of springboot + kotlin in the same way as war files. I might be missing something here, because I have been researching about it and could get a good answer so far. I try @napperley suggesation but I could make it work . any other suggestion?

guys, do you know any way to do a soap requests using kotlin?Or should i use java interoperability instead?

We’re in an exploratory phase in building REST, GraphQL, and RPC APIs using ktor or spark. Which DBAL library do you prefer? 1️⃣ Exposed 2️⃣ Requery 3️⃣ Other (please specify)

squash looks lovely. I'm building something similar for mongodb

plus, jOOQ looks really really like SQL, while squash apparently uses some sort of DSL for at least some things (e.g.

where { Citizens.id eq "eugene" }

)

Receivers are regular Java parameters. The big question is: can you rename the parameter? Maybe via

@JvmName