Toby's Clean Spring - Domain Model Pattern and Hexagonal Architecture Part 2

This is the first lecture in the Clean Spring series, a course designed to let you experience the process of a fictional startup development team building a fast, stable, flexible, and maintainable system by following clean code and Spring development principles in a way that mirrors real-world work. You will learn the techniques and development strategies required for the initial domain-driven development phase using the Domain Model Pattern and Hexagonal Architecture.

This course will help you understand the operating principles of Spring Boot by creating the core functions of Spring Boot yourself, and learn how to learn and use Spring Boot well through this. You can learn various ways to utilize the Spring Framework used by Spring Boot.

By examining the process of how the Spring Framework was created, we will identify principles that help in better understanding and utilizing Spring. Through this, we will also explore how the application code written by developers should be structured.

This is a meetup video featuring Toby, a developer with 31 years of experience, discussing the meaning of an "Augmented Developer" and the core competencies required.

This is the first lecture in the Clean Spring series, a course designed to let you experience the process of a fictional startup development team building a fast, stable, flexible, and maintainable system by following clean code and Spring development principles in a way that mirrors real-world work. You will learn the techniques and development strategies required for the initial domain-driven development phase using the Domain Model Pattern and Hexagonal Architecture.

Learn how to easily integrate the ChatGPT API using Spring AI and develop an AI server through prompt engineering!!

Spring Web Programming learned while creating a calendar (schedule management)! Completely master Spring with examples you can use right away, not just short snippets~

It covers just two things properly: object-oriented programming and the JVM! Plus, it throws in linked-list-based linear data structures.

You will learn how to set up/use spring boot actuator and how to create your own custom endpoints and metrics. You will learn not only how to use it, but also the internal code and basic knowledge of spring boot, so you can understand it a little more deeply.

For those aspiring to be Java-based Spring backend developers, to easily secure a job, we learn Java properly! Rigorously!

Through this course, you will gain a deep understanding of clean code principles and be able to write clean code based on object-oriented thinking. This course is for anyone curious about clean code and object-orientation, and everyone who truly wants to write good code.

It's time to master Java's various features so you can apply them in practice! ^^ Let's make it completely yours by solving algorithm problems together. Teacher Eun-jong will continue to be with you in Part 2.

This course is a practical program where you will master Kotlin-based AI agent development by building your own coding agents. Using Koog, an AI framework built with Kotlin, you will learn step-by-step how to implement coding agents similar to Claude Code, Cursor, and Junie. Koog is more than just a simple server-side framework; it integrates seamlessly with Spring and offers the scalability to connect with various environments—including Android, iOS, Desktop, and Web—through Kotlin Multiplatform (KMP). By building intelligent agents that can read, analyze, modify, and generate code, you will gain hands-on experience in AI agent architecture, strategy, context handling, and tool integration.

Are you lost while learning web development? I'll help you find your own way. Even if you're not from a computer science background, you can understand how web service architecture works through a short 1-hour lecture.

With the price of a chicken combo, you'll learn the deployment process in order: Spring Boot manual deployment -> Docker deployment -> Github Action CI/CD!

Learn Springboot + NextJS RestAPI Board Creation Faster Than Anyone! Develop a CRUD server with Springboot and create your own board with NextJS!

Just listen. The lecturing skill, captivating power, and lecture quality are different.

Experience the power of Type Safe SQL with jOOQ!

Learn Springboot + Flutter RestAPI Board Creation Faster Than Anyone Develop a CRUD server with Springboot and create your own board with Flutter!!

Building an 'Intelligent Collaboration' Expert Agent Team Using Spring AI Router Pattern + RAG + MCP Beyond a Single Agent to Architecture: The Standard for Router Patterns and Agent Isolation Design

This course proceeds in stages where you learn and apply necessary knowledge while building infrastructure, similar to real-world practice.

Handling media (video, audio) on the web is now easier than ever! Learn the MediaStream API and WebRTC by following along step by step.

An AI system that grades and reviews your code in just 5 seconds—imagination becomes reality. This course is an all-in-one project curriculum for creating a **'GitHub PR Auto-Analysis and Grading Bot'** using Spring AI. When a student submits an assignment (Pull Request), the server detects it, and the AI analyzes the code changes (Diff). The grading results are then stored in a database, feedback is automatically posted as a GitHub comment, and the student can check their results on a dedicated dashboard. From backend to AI integration and frontend (Vaadin), all with just Java! This is the ultimate introductory guide for any developer who wants to build their own AI service from A to Z.

The most definitive practical guide for developers who want to integrate AI into their Spring projects right away! Beyond simple LLM API calls, you will perfectly master building production-level AI environments that can be immediately applied to real business logic using RAG and MCP.