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Silver_devSep 22, 2026 • 8 min read
Spring Boot Under the Hood. Part 1: What Really Happens When You Call SpringApplication.run()
1.1. The main() Entry Point — Anatomy of the Startup Every Spring Boot application starts...
#java#deepdive#spring#springboot
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Silver_devSep 24, 2026 • 8 min read
Spring Boot Under the Hood. Part 7: From Embedded Tomcat to Your @RestController
We've reached the point where refresh() calls onRefresh() on the context. For web applications,...
#java#deepdive#spring#springboot
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Silver_devSep 24, 2026 • 5 min read
Spring Boot Under the Hood. Part 8: Graceful Exit — How Spring Boot Starts and Stops
In Part 1, we left off where SpringApplication.run() calls callRunners() and publishes...
#java#spring#deepdive#intermediate
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Silver_devSep 22, 2026 • 5 min read
Spring Boot Under the Hood. Part 2: Where Your application.yml Actually Goes
2.1. What Is an Environment and Why You Need One The Environment is a central Spring...
#java#deepdive#spring#intermediate
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Silver_devSep 22, 2026 • 7 min read
Spring Boot Under the Hood. Part 3: Assembling the Container — How Boot Builds Its ApplicationContext
3.1. What Is an ApplicationContext and Why There Are Several ApplicationContext is an...
#java#deepdive#spring#intermediate
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Silver_devSep 23, 2026 • 7 min read
Spring Boot Under the Hood. Part 4: @SpringBootApplication — Three Annotations, Three Mechanisms
We've reached the point where the BeanDefinitionLoader (Part 3) has registered the BeanDefinition fo...
#java#deepdive#spring#intermediate
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Silver_devSep 23, 2026 • 9 min read
Spring Boot Under the Hood. Part 6: Bean Lifecycle — Born, Post-Processed, Destroyed
By this point we have: A fully built ApplicationContext (Part 3) BeanDefinitions registered by...
#java#deepdive#spring#intermediate
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Silver_devSep 23, 2026 • 8 min read
Spring Boot Under the Hood. Part 5: The Heart of Spring Boot — How Auto-configuration Works
Auto-configuration is the heart of Spring Boot. It's what lets you add spring-boot-starter-web to...
#java#deepdive#spring#intermediate
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