What is the Spring IoC Container and how does its lifecycle work? | Under the Hood
How does the Spring IoC Container actually work from
application startup to shutdown?
In this Spring Under the Hood episode, we break down the lifecycle of
the Spring IoC Container and connect the conceptual lifecycle to the
actual Spring Framework internals.
You will learn: • What the Spring IoC Container is • How
ApplicationContext acts as the IoC container • The Hollywood Principle
and Inversion of Control • How Spring reads configuration and creates
bean definitions • How BeanFactoryPostProcessors process bean-definition
metadata • How Spring creates, configures, and assembles beans • Where
dependency injection happens in the lifecycle • How BeanPostProcessors
participate in bean initialization • What happens while the application
is running • How Spring closes the ApplicationContext and invokes
destruction callbacks • Why AbstractApplicationContext.refresh() is
important • What refresh() actually means during Spring context
initialization
We also look at the Spring Framework source code behind
AbstractApplicationContext.refresh() to understand how the container
lifecycle is orchestrated internally.
This video is designed for Spring developers, Java developers, interview
preparation, and anyone who wants to understand Spring beyond
annotations and configuration.
Keep Learning. Keep Building. Keep Architecting.
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