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SPRING BOOT APPLICATION LIFECYCLE

Run​

SpringApplication.run() triggers application lifecycle

Bootstrap​

  • Creates an appropriate ApplicationContext instance.
  • Loads application context with beans.

Environment Preparation​

  • Loads and configures properties (e.g. application.properties / application.yml)
  • Calls EnvironmentPostProcessor to customise environment (properties / profiles) before beans are processed

Context Preparation​

  • Calls ApplicationContextInitializer
  • Prepares ApplicationContext

Context Refresh​

  • Loads all bean definitions
  • Refresh ApplicationContext

Application Running​

  • Calls CommandLineRunner and ApplicationRunner beans.

Shutdown Phase​

  • For graceful shutdown
  • Calls DisposableBean / @PreDestroy annotated methods

References​