Ktor Chat

This project provides a full example of a full-stack Ktor application using Compose Multi-platform, Amper, Exposed, Koin, and other bleeding-edge Kotlin libraries.

Project Structure

The project consists of the following amper modules:

module	description
core	domain data objects, interfaces, and exceptions
server / db	exposed database schema types and repository implementations
server / common	common server functionality
server / rest	ktor server REST implementation
server / htmx	HTMX server implementation
server / admin	admin service for making sensitive changes
client	common client library for interacting with the back-end
app / common	shared front-end application code
app / android	android front-end application
app / desktop	jvm desktop front-end application

The dependencies of the modules flow towards the domain module: core.

Below is a diagram of how the modules depend on one another:

mindmap
  root((core))
    id(app)
      desktop
      android
    id(server)
      rest
      htmx
      admin
    id{{client}}
    id{{db}}

Loading

Note, "common" module is implied for the server and app modules here.

Running

There are multiple chat client implementations under ./chat-app-* that can be executed independently with a mock environment, or with a server running.

Here is a list of the commands for running each program:

application	main source	gradle command
server-rest	server/rest/src/io/ktor/chat/Application.kt	./gradlew :server:rest:run
server-htmx	server/htmx/src/io/ktor/chat/Application.kt	./gradlew :server:htmx:run
desktop app	app/desktop/src/main.kt	./gradlew :app:desktop:jvmRun
android app	app/android/src/io/ktor/chat/MainActivity.kt	./gradlew :app:android:jvmRun

With Docker

If you'd like to run everything in a containerized environment:

Firstly, publish images locally using:

• ./gradlew :server:rest:publishImageToLocalRegistry
• ./gradlew :server:admin:publishImageToLocalRegistry

Now, you can run docker compose:

docker compose up