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What is the lifecycle of an object created with Spring?

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Answer from AI

  1. Creating an instance: The Spring IoC container creates an object instance by calling the constructor.
  2. Dependency injection: The container injects dependencies into the object (for example, using @Autowired).
  3. Calling setBeanName: If the bean implements BeanNameAware, the setBeanName method is called, passing the bean's name.
  4. Calling setBeanFactory: If the bean implements BeanFactoryAware, the setBeanFactory method is called, passing the BeanFactory.
  5. Calling setApplicationContext: If the bean implements ApplicationContextAware, the setApplicationContext method is called, passing the ApplicationContext.
  6. Calling postProcessBeforeInitialization: The container calls the postProcessBeforeInitialization method on all BeanPostProcessors applied to this bean.
  7. Calling afterPropertiesSet: If the bean implements InitializingBean, the afterPropertiesSet method is called.
  8. Calling custom initialization method: If an initialization method is specified in the bean configuration (for example, via @PostConstruct or init-method), it is called.
  9. Calling postProcessAfterInitialization: The container calls the postProcessAfterInitialization method on all BeanPostProcessors applied to this bean. The bean is now fully ready for use.
  10. Using the bean: The bean is used by the application.
  11. Calling destroy: Before destroying the container or when removing the bean, the destroy method is called if the bean implements DisposableBean.
  12. Calling custom destruction method: If a destruction method is specified in the bean configuration (for example, via @PreDestroy or destroy-method), it is called.
  13. Destroying the bean: The bean is removed by the garbage collector.
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