44、[源码]-Spring容器创建-BeanFactory预准备

@Override
public void refresh() throws BeansException, IllegalStateException {
	synchronized (this.startupShutdownMonitor) {
		// Prepare this context for refreshing.
		prepareRefresh();

		// Tell the subclass to refresh the internal bean factory.
		ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();

		// Prepare the bean factory for use in this context.
		prepareBeanFactory(beanFactory);

		try {
			// Allows post-processing of the bean factory in context subclasses.
			postProcessBeanFactory(beanFactory);

			// Invoke factory processors registered as beans in the context.
			invokeBeanFactoryPostProcessors(beanFactory);


		}

}

Spring容器的refresh()【创建刷新】;

1、prepareRefresh()刷新前的预处理;
  1. initPropertySources()初始化一些属性设置;子类自定义个性化的属性设置方法;
  2. getEnvironment().validateRequiredProperties();检验属性的合法等
  3. earlyApplicationEvents= new LinkedHashSet();保存容器中的一些早期的事件;
2、obtainFreshBeanFactory();获取BeanFactory;
  1. refreshBeanFactory();刷新【创建】BeanFactory;
    创建了一个this.beanFactory = new DefaultListableBeanFactory();
    设置id;
  2. getBeanFactory();返回刚才GenericApplicationContext创建的BeanFactory对象;
  3. 将创建的BeanFactory【DefaultListableBeanFactory】返回;
3、prepareBeanFactory(beanFactory);BeanFactory的预准备工作(BeanFactory进行一些设置);
  1. 设置BeanFactory的类加载器、支持表达式解析器...
  2. 添加部分BeanPostProcessor【ApplicationContextAwareProcessor】
  3. 设置忽略的自动装配的接口EnvironmentAware、EmbeddedValueResolverAware、xxx
  4. 注册可以解析的自动装配;我们能直接在任何组件中自动注入: BeanFactory、ResourceLoader、ApplicationEventPublisher、ApplicationContext
  5. 添加BeanPostProcessor【ApplicationListenerDetector】
  6. 添加编译时的AspectJ;
  7. 给BeanFactory中注册一些能用的组件;
    • environment【ConfigurableEnvironment】、
    • systemProperties【Map<String, Object>】、
    • systemEnvironment【Map<String, Object>】