Knowledge Factory

Here’s a step-by-step guide to creating a Kotlin Ktor project and deploying it on AWS Elastic Beanstalk using GitHub Actions. Here is the general architecture diagram that we will be deploying. 1. Create a Kotlin Ktor Project Set up the project : Use the Ktor Project Generator to generate a starter project. Choose: Build System: Gradle (Kotlin DSL) Engine: Netty Add features like Serialization , ContentNegotiation , and Routing . Directory structure : Extract and open the project in your IDE (e.g., IntelliJ IDEA). Application entry point : Update the Application.kt file to define routes. Example: import io.ktor.application.* import io.ktor.response.* import io.ktor.routing.* import io.ktor.server.engine.* import io.ktor.server.netty.* fun main () { embeddedServer(Netty, port = 8080 ) { routing { get ( "/" ) { call.respondText( "Hello, AWS Elastic Beanstalk!" ) } } }.start(wait = true ) } Build...

To create a simple CRUD application using Ktor (backend) and Vue.js (frontend), follow these steps: Backend (Ktor) Set up Ktor Project : In your build.gradle.kts file, add Ktor dependencies for HTTP, serialization, and PostgreSQL (or another database if preferred): plugins { kotlin( "jvm" ) version "1.8.0" application } dependencies { implementation( "io.ktor:ktor-server-core:2.2.2" ) implementation( "io.ktor:ktor-server-netty:2.2.2" ) implementation( "io.ktor:ktor-serialization-kotlinx-json:2.2.2" ) implementation( "io.ktor:ktor-server-sessions:2.2.2" ) implementation( "org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.0" ) implementation( "org.jetbrains.exposed:exposed-core:0.41.1" ) implementation( "org.jetbrains.exposed:exposed-dao:0.41.1" ) implementation( "org.jetbrains.exposed:exposed-jdbc:0.41.1" ) implementation( "org.post...

Here’s how you can build RESTful CRUD APIs using Ktor and MongoDB for a basic application: Step 1: Create Ktor Project Set Up Dependencies in your build.gradle.kts : dependencies { implementation( "io.ktor:ktor-server-core:2.3.3" ) implementation( "io.ktor:ktor-server-netty:2.3.3" ) implementation( "org.mongodb:mongodb-driver-sync:4.10.2" ) implementation( "ch.qos.logback:logback-classic:1.4.11" ) } Main Application File (Application.kt) : import io.ktor.application.* import io.ktor.features.ContentNegotiation import io.ktor.http.HttpStatusCode import io.ktor.jackson.jackson import io.ktor.response.respond import io.ktor.routing.* import io.ktor.server.engine.embeddedServer import io.ktor.server.netty.Netty import io.ktor.features.StatusPages import org.litote.kmongo.* import io.ktor.request.receive import io.ktor.http.HttpMethod // MongoDB client setup val client = KMongo.createClient() val database = client.ge...

To build a CRUD (Create, Read, Update, Delete) application using Ktor for the backend and React.js for the frontend, follow these steps: 1. Backend: Ktor Setup Ktor Project Create a new Ktor project: Use Ktor Project Generator or manually set it up. Add dependencies for ktor-server-core , ktor-server-netty , ktor-server-content-negotiation , and ktor-serialization . Add the following dependencies in build.gradle.kts : implementation ( "io.ktor:ktor-server-core:2.x.x" ) implementation ( "io.ktor:ktor-server-netty:2.x.x" ) implementation ( "io.ktor:ktor-server-content-negotiation:2.x.x" ) implementation ( "io.ktor:ktor-serialization-kotlinx-json:2.x.x" ) implementation ( "ch.qos.logback:logback-classic:1.x.x" ) // For logging Create Ktor Application Define a simple API for managing resources. File: Application.kt package com.example import io.ktor.application.* import io.ktor.http.* import io.ktor.response.* import io.ktor.r...

To implement a simple CRUD (Create, Read, Update, Delete) application using Ktor 3 (a Kotlin web framework) for the backend and Angular for the frontend, follow these general steps: 1. Backend Setup (Ktor) 1.1. Create a Ktor 3 Project First, create a Ktor project. You can use the Ktor project generator ( https://start.ktor.io/ ) or manually set up the project with Gradle or Maven. Ensure you have the required dependencies for Ktor 3, such as: ktor-server-core ktor-server-netty (for the server) ktor-server-content-negotiation (for JSON serialization) ktor-server-cors (for cross-origin requests) 1.2. Install Dependencies Add the necessary dependencies in the build.gradle.kts file: plugins { kotlin( "jvm" ) version "1.9.0" id ( "io.ktor.plugin" ) version "3.0.0" } dependencies { implementation( "io.ktor:ktor-server-core:3.0.0" ) implementation( "io.ktor:ktor-server-netty:3.0.0" ) implementation( ...

Building RESTful CRUD APIs using Ktor and PostgreSQL is a powerful way to create scalable and efficient web applications. Below is a step-by-step guide to building a simple RESTful API that interacts with a PostgreSQL database, where you can create, read, update, and delete records. 1. Setting Up the Project Start by setting up a Ktor project. Here’s an outline of the steps: Add dependencies to build.gradle.kts (Kotlin DSL): plugins { kotlin( "jvm" ) version "1.8.20" application } dependencies { implementation( "io.ktor:ktor-server-core:2.2.4" ) implementation( "io.ktor:ktor-server-netty:2.2.4" ) implementation( "io.ktor:ktor-serialization-kotlinx-json:2.2.4" ) implementation( "org.jetbrains.exposed:exposed-core:0.41.1" ) implementation( "org.jetbrains.exposed:exposed-dao:0.41.1" ) implementation( "org.jetbrains.exposed:exposed-jdbc:0.41.1" ) implementation( "or...