Programmatic Bean Registration with Spring Framework 5.0 - Josh Long

on YouTube ↗26m

" summary

Shows how Spring Framework 5 lets code register beans at runtime using SpringApplicationBuilder and an ApplicationContext initializer, replacing boilerplate configuration with registerBean with Supplier and BeanDefinitionCustomizer hooks. Demonstrates Java and Kotlin beans DSL, uses Spring Boot, WebFlux routes, Reactive MongoDB and Lombok, and builds a tiny app (about 40 lines of code) that registers a CustomerService, an ApplicationRunner and a RouterFunction and runs — curl returns "hello world".

AI-written summary · about

" chapters (15)

1. 0:00Introduction
2. 1:38About Josh
3. 3:40Overview
4. 6:30Building the Application
5. 7:35Annotations
6. 9:20Bean Provider
7. 10:30Application
8. 11:45Customer Service
9. 13:15Configuration
10. 15:20Rewriting Application Builder
11. 17:15Rewriting Application Runner
12. 20:05Running the Application
13. 21:50Copy and Paste
14. 22:50Application Runner
15. 24:20Testing

" related talks

• 01h 01mFunctional Spring BootJohn Burns · Devnexus 2025
• 49mMagical Beans and MysteryTimo Salm · JCON EUROPE 2025
• 45mJava: Where did you get this bean?Dominik Przybysz · 4Developers 2020
• 01h 13mSpring: Your next Java microframeworkAleksey Nesterov · Joker 2020
• 48mWhere Did You Get That Bean?Dominik Przybysz · 4Developers Wrocław 2019
• 35mSpring: your next Java micro-frameworkAlexey Nesterov · Spring I/O Bridge 2020
• 01h 22mModern Java Component Design with Spring Framework 4.2Stéphane Nicoll, Juergen Holler · SpringOne2GX 2015
• 37mWhere did you get this bean?Dominik Przybysz · JDD 2019