Das Boot: Diving into Debugging Spring Boot Applications
summary
A live-coding dive into Spring Boot startup and debugging that shows exactly what runs, how auto-configuration picks beans, and how to find the real source of values. Builds a small REST app (jar) that returns a configurable owner, demonstrates IntelliJ debugging and remote JVM debug, exposes Actuator and uses the actuator environment endpoint to trace overrides, and reveals Spring Boot auto-config creates 267 beans here. Shows command-line, environment and application.properties precedence and the app works end-to-end.
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chapters (17)
- 0:00Intro
- 5:30About me
- 6:40The Plan
- 8:25Spring Initializer
- 11:40Opening Das Boot
- 13:20Spring Boot Application Overview
- 15:00AtConfiguration Annotation
- 17:10AtConfiguration Component
- 21:30Spring Application Run
- 23:10Time Check
- 28:45Rest Controller
- 31:55Running the application
- 32:35How do we know where this came from
- 33:50Actuator
- 36:40Bean Owner
- 39:00Command Line Runner
- 41:25Remote Debugging
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