Master Kotlin through Real Project Practice

Kotlin and Coroutines

Ktor is designed from the ground up on Kotlin and Coroutines, giving you a concise, multiplatform language that lets you experience the power of asynchronous programming with an intuitive imperative flow.

Lightweight and Flexible

Ktor lets you use only what you need, and lets you structure your application the way you want. It’s also very easy for users to extend Ktor with their own plugins.

Built and backed by JetBrains

Ktor, from JetBrains, the creators of IntelliJ IDEA, Kotlin, etc., is used by customers as well as internally at JetBrains. It also provides top-notch tool support!

Rich ecosystem [ Github , X ]

As a framework supported and developed by JetBrains, it provides a rich ecosystem and can also contribute to the growth of top-tier frameworks.

Null Safety

Kotlin basically performs a safety check for null values at compile time. This prevents the server from going down due to a Null Point Exception in an actual operating environment.

Concise code format and lambda support

Compared to Spring, the code is very concise and the basic functions provided are rich.

Additionally, functional programming allows for friendly code work and flexible use of higher-order functions.

100% interoperability with modern languages and Java

The functional programming features and asynchronous processing through coroutines make it very suitable for expressing grammar in a modern language form, and since it can be 100% mixed with Java, there is no great difficulty in transferring existing sources.

Integration of mobile and server and rich community

As the mobile market grows, managing mobile development and server development together is a very productive way. It is also a language that JetBrains and Google actively support and develop.

Jakarta

• It is used to implement the mail sending function.

  
  

MinIO

• It is used to handle Object Storage and is built using Docker.

MySQL

• Used to manage the status of related data.

Token paste

• Apply stateless authentication via tokens.

Ulid

• It is used to understand the nature of the database and to counter the vulnerability of AUTO_INCREMENT.

Various encryption protocols

• We use various encryption methods for password encryption and data encryption.

  
  

Lecture 1

It's warm-up time. Please take the time to learn the basics of Kotlin and how to use Ktor.

Lecture 2

The code and theory for handling MySQL in Kotlin are not limited to the language, and cover the essential parts that you need to know to use MySQL.

Lecture 3

How can we apply the concept of DI used in Spring to Ktor and Kotlin? It's time to use open source to smoothly carry out DI work.

Lecture 4

There are various authentication methods between servers and clients, and the most commonly used one is stateless authentication. Learn about the methods for implementing this method and its pros and cons.

Lecture 5

This is the first encryption session in this course. Learn how to encrypt user passwords using various encryption algorithms with excellent security and multiple hashing algorithms.

Lecture 6

This is the second encryption method. It is an encryption method that combines two methods to implement a safe form, and it simultaneously performs data integrity and data encryption, and we are explaining the encryption method.

Lecture 7

Developers must eventually implement functions and communicate with the database. Learn how to write MySQL queries in Kotlin and see and experience various queries for yourself!

Lecture 8

How can we store file data? Let's see for ourselves how to implement Object Storage, which is the same format as AWS S3, through Docker and use it in real life!

Lecture 9

You can learn how to handle file data on the server. You can learn about the pros and cons of reading data in chunk form, and you can test it by handling file data in various ways and storing it in Object Storage, which was covered earlier!

Lecture 10

As a representative function of the functional implementation, the mail transmission system is implemented using the Jakata Protocol.

Also, implement a scalable architecture by utilizing Factory Pattren and apply dynamic service logic accordingly to build a scalable service.

Kotlin Master Class: Learning through Bank Server Project Practice

• You can learn everything about data processing methods, DB considerations, and how to utilize event-based data according to traffic type, using polyglot persistence strategies and Kafka, etc.

A master class in coroutines that is close to the basics and faithful to the basics

• Based on the official coroutine documentation, this is a coroutine master class for developers in large companies!! Check out the lectures that include the opinions of practical developers based on various examples!