Kotlin Server Side
SMILE EGBAI
ANDROID DEVELOPER @PAYLATERNG
@SMILEEGBAI (TWITTER & MEDIUM)
Line Up
- Where can we use it
- Why server side
- Server side frameworks
- Case study: ktor
- Q&A
Where can we use it?
- Android
- iOS
- Server
- Web Front-end
- Machine Specific
Why write Kotlin on server?
- Functional Objective constructs
- Fast development
- Concise code with robust frameworks
- Type & Null Safety
What do I gain as an Android Dev?
-
Keeping up-to date
-
One language
-
Our own fullstack
How does it work?
-
JAVASCRIPT
-
JVM
Transpilation to JS
What does Kotlin give us in Node.js
Type safety
let a = [,,,]
a.length // -> 3
a.toString() // -> ',,'What does Kotlin give us in Node.js
- Type safety
- No Callback hell
fs.readdir(source, function (err, files) {
if (err) {
console.log('Error finding files: ' + err)
} else {
files.forEach(function (filename, fileIndex) {
console.log(filename)
gm(source + filename).size(function (err, values) {
if (err) {
console.log('Error identifying file size: ' + err)
} else {
console.log(filename + ' : ' + values)
aspect = (values.width / values.height)
widths.forEach(function (width, widthIndex) {
height = Math.round(width / aspect)
console.log('resizing ' + filename + 'to ' + height + 'x' + height)
this.resize(width, height).write(dest + 'w' + width + '_' + filename, function(err) {
if (err) console.log('Error writing file: ' + err)
})
}.bind(this))
}
})
})
}
})What Kotlin gives us with JVM based servers
Spring & Vertex
- Nullable information on spring annotations
- Functional routing using kotlin DSL
- Extensions for Rest Template and WebApi
Ktor
Is a framework built by JetBrains for creating Web applications in Kotlin, making use of coroutines for high scalability and offering an easy-to-use and idiomatic API.
- Asynchronous in nature(Based of coroutines)
- Application server written in Kotlin for Kotlin
- Sponsored and developed by Jetbrains
-
CORS (Cross Origin Resource Sharing)
-
Content negotiation
-
GSON/Jackson
Keywords
MICRO-DEMO
Kotlin Server Side
By egbai mmumene
