Spring中的refreshContext源码分析

@Override
	public void refresh() throws BeansException, IllegalStateException {
		synchronized (this.startupShutdownMonitor) {
			...
			// Prepare the bean factory for use in this context.
			//设置beanFacotry 和加载一些特殊bean的处理类，
			prepareBeanFactory(beanFactory);
				// 一些web项目的bean处理类
				postProcessBeanFactory(beanFactory);
				// Invoke factory processors registered as beans in the context.
				//重要，唤醒 BeanFactoryPostProcessor的实现类
				invokeBeanFactoryPostProcessors(beanFactory);
				...
				// Register bean processors that intercept bean creation.
				//重要，将BeanPostProcessor的bean定义注册进来
				registerBeanPostProcessors(beanFactory);
				...
				// Initialize event multicaster for this context.
				//再次创建一个广播器
				initApplicationEventMulticaster();
				...
				// Check for listener beans and register them.
				//注册listener到上述的心广播器中
				registerListeners();
				// Instantiate all remaining (non-lazy-init) singletons.
				//重要，创建单例bean
				finishBeanFactoryInitialization(beanFactory);
				...
		}
	}

protected void prepareBeanFactory(ConfigurableListableBeanFactory beanFactory) {
		//添加了一个BeanPostProcessor实例ApplicationContextAwareProcessor
		// Configure the bean factory with context callbacks.
		beanFactory.addBeanPostProcessor(new ApplicationContextAwareProcessor(this));
		beanFactory.ignoreDependencyInterface(EnvironmentAware.class);
		beanFactory.ignoreDependencyInterface(EmbeddedValueResolverAware.class);
		beanFactory.ignoreDependencyInterface(ResourceLoaderAware.class);
		beanFactory.ignoreDependencyInterface(ApplicationEventPublisherAware.class);
		beanFactory.ignoreDependencyInterface(MessageSourceAware.class);
		beanFactory.ignoreDependencyInterface(ApplicationContextAware.class);
		//指定特定依赖的返回结果
		beanFactory.registerResolvableDependency(BeanFactory.class, beanFactory);
		beanFactory.registerResolvableDependency(ResourceLoader.class, this);
		beanFactory.registerResolvableDependency(ApplicationEventPublisher.class, this);
		beanFactory.registerResolvableDependency(ApplicationContext.class, this);
		// Register early post-processor for detecting inner beans as ApplicationListeners.
		//添加了一个BeanPostProcessor实例ApplicationListenerDetector
		beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(this));
		...
	}

  	ApplicationContextAwareProcessor //这个bean处理器就是在实现了
 		EnvironmentAware.class
 		EmbeddedValueResolverAware.class
 		ResourceLoaderAware.class
 		ApplicationEventPublisherAware.class
 		MessageSourceAware.class
 		ApplicationContextAware.class
 		//的类实例化之前唤醒对应的接口方法

protected void registerListeners() {
		// Register statically specified listeners first
		//加载老的listener
		for (ApplicationListener<?> listener : getApplicationListeners()) {
			getApplicationEventMulticaster().addApplicationListener(listener);
		}
		//加载新的listenner
		// Do not initialize FactoryBeans here: We need to leave all regular beans
		// uninitialized to let post-processors apply to them!
		String[] listenerBeanNames = getBeanNamesForType(ApplicationListener.class, true, false);
		for (String listenerBeanName : listenerBeanNames) {
			getApplicationEventMulticaster().addApplicationListenerBean(listenerBeanName);
		}
		// Publish early application events now that we finally have a multicaster...
		//发送默认的事件集
		Set<ApplicationEvent> earlyEventsToProcess = this.earlyApplicationEvents;
		this.earlyApplicationEvents = null;
		if (earlyEventsToProcess != null) {
			for (ApplicationEvent earlyEvent : earlyEventsToProcess) {
				getApplicationEventMulticaster().multicastEvent(earlyEvent);
			}
		}
	}