Iterate Fast With Ktor In I outlined how to deploy an AppEngine app by deploying a file. Since then Google has listened to mobile devs needing to build server side solutions and has launched . part 1 .jar Kotlin on Google Cloud Platform _With the Skills You Already Have_hackernoon.com Deploy A Backend App As An Android Engineer One of the highlighted solutions is Ktor, which allows a standalone backend app in Kotlin that can interact with other libraries just as one would on the client side. The great thing about Ktor is with Guava, which is still a mystery, are less of an issue because the code runs similar to how it would on an IDE in that you can define the main method of the app and let it run. obscure library compatibility issues like this one The Google Cloud Platform documentation has room for improvement. I went through 2 other configuration tutorials, and AppEngine setups in order to realize Ktor was what I needed to deploy a Kotlin app to run server tasks without endpoints. Standard Flexible Despite Jars being slow to work with I still am using a Jar deploy for some use cases. For instance, authenticating with Firebase is straightforward and reliable with service accounts used in Jars, whereas with ktor there is with authentication that I’ve discovered. this issue Jars are Janky ~10–20 min deploy times. Must rebuild .jar every time to test new code or different environment types. Library incompatibility issues. Tutorial: Run a Kotlin Ktor app on Google App Engine Standard This tutorial was quick, clear, and concise. I highly recommend it! One aspect it left out is versioning which is important as I like to have a and version deployed to AppEngine. staging production File Notes build.gradle App Engine Gradle Plugin Tasks and Properties Find latest version of Ktor to use: . github.com/ktorio/ktor/releases buildscript {    ext.ktor_version = ' ' } 1.0.0 ... Defining AppEngine version: appengine {    deploy {        version = '1-2-0'    }} ClassWithMainMethod.kt In order to run the method from your IDE such as IntelliJ you need to comment out the method and use a main method within an Object IntelliJ can configure from In order to run with AppEngine and deploy use the method. main Application.main Run/Debug Configurations. Application.main import io.ktor.application.Application fun Application.main() {// App logic here.} Run with IntelliJ: object Initialization {@JvmStaticfun main(args: Array<String>) {// App logic here.}} sample uses: appengine-web.xml Specify Java 8 runtime Scaling Resource files using include SSL enabled (HTTP vs HTTPs) : Under sample use: web.xml src/main/webapp/WEB-INF/ web.xml: defines mappings between URL paths and the servlets that handle requests with those paths Managing SDK Configurations Rather than building artifacts in IntelliJ repeatedly the command line can quickly help you create and navigate between AppEngine projects, run your app to test, and deploy to the server. See this to make use of this. terminal commands guide I’m Adam Hurwitz — hit the clapping hands icon and check out the rest of my writing if you enjoyed the above. Thanks for reading! Resources GCP Install the latest Cloud Tools… Quickstart GCP console AppEngine Pricing IntelliJ Configuring your development environment Creating a new App Engine project Adding (GCP) Framework Support (to IntelliJ) Creating a new (IntelliJ) application (to use with GCP) Checking out an existing (IntelliJ) project (to use with GCP) Kotlin Run a Kotlin Ktor app on Google App Engine Standard App Engine Gradle Plugin Tasks and Properties github.com/ktorio/ktor-samples Logging Console ktor Kotlin on Google Cloud Platform Communities Discuss Google Cloud Platform Cloud Connect Community Google Cloud Platform Support stackoverflow.com/questions/tagged/google-cloud-kotlin Cloud Kotlin Google Group github.com/GoogleCloudPlatform/kotlin-samples github.com/GoogleApis github.com/google-cloud-java github.com/GoogleCloudPlatform github.com/app-gradle-plugin

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