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https://blog.csdn.net/caicongyang/category_2139981.html?spm=1001.2014.3001.5482
1. this() method
a.构建DefaultListableBeanFactory、AnnotatedBeanDefinitionReader、ClassPathBeanDefinitionScanner
b. Register the relevant BeanFactoryProcess with BeanDefinitionRegistry in advance during the construction of AnnotatedBeanDefinitionReader.
源码见org.springframework.context.annotation.AnnotationConfigUtils#registerAnnotationConfigProcessors(org.springframework.beans.factory.support.BeanDefinitionRegistry, java.lang.Object)
Register BeanDefinition here in advance:
ConfigurationClassPostProcessor AutowiredAnnotationBeanPostProcessor CommonAnnotationBeanPostProcessor PersistenceAnnotationBeanPostProcessor internalPersistenceAnnotationProcessor DefaultEventListenerFactory EventListenerMethodProcessor
2.register(componentClasses) method
Register the configuration class with BeanDefinitionRegistry
3.refresh() method
a.prepareRefresh(): Start time, etc., set configuration information to Environment
b.obtainFreshBeanFactory(): Determine whether to refresh the container balance
c.prepareBeanFactory(beanFactory):
After mentioning, add two beans, ApplicationContextAwareProcessor/ApplicationListenerDetector, to the beanfactory.
Add resolvableDependencies: When performing dependency injection byType, the bean will be found based on the type from this attribute.
Simply understand it as injecting this bean in advance;
// BeanFactory interface not registered as resolvable type in a plain factory.
// MessageSource registered (and found for autowiring) as a bean.
beanFactory.registerResolvableDependency(BeanFactory.class, beanFactory);
beanFactory.registerResolvableDependency(ResourceLoader.class, this);
beanFactory.registerResolvableDependency(ApplicationEventPublisher.class, this);
beanFactory.registerResolvableDependency(ApplicationContext.class, this);d.invokeBeanFactoryPostProcessors(beanFactory) 方法
Execute BeanFactoryPostProcessor. The focus is on the beanFactoryPostProcessor that was put in earlier. The beanFactoryPostProcessor recursively parses the @Component @Bean @Import @ImportSource class and scans and produces all BeanDefinitions;
The core classes are:
org.springframework.context.annotation.ConfigurationClassPostProcessor#processConfigBeanDefinitions
e.registerBeanPostProcessors(beanFactory)方法
Instantiate and sort the scanned BeanPostProcessors, and add them to the beanPostProcessors property of BeanFactory
f.initMessageSource() method
Set the MessageSource of ApplicationContext,
g.initApplicationEventMulticaster();
publish broadcast
h.registerListeners();
Register listener
i.finishBeanFactoryInitialization(beanFactory);
Initialize singleton method
j.finishRefresh();
Publish some life cycle events, etc.