spring中AbstractApplication的invokeBeanFactoryPostProcessors方法

 这个方法会调用PostProcessorRegistrationDelegate类的invokeBeanFactoryPostProcessors方法

protected void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory) {
		PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(beanFactory, getBeanFactoryPostProcessors());

		// Detect a LoadTimeWeaver and prepare for weaving, if found in the meantime
		// (e.g. through an @Bean method registered by ConfigurationClassPostProcessor)
		if (!NativeDetector.inNativeImage() && beanFactory.getTempClassLoader() == null && beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
			beanFactory.addBeanPostProcessor(new LoadTimeWeaverAwareProcessor(beanFactory));
			beanFactory.setTempClassLoader(new ContextTypeMatchClassLoader(beanFactory.getBeanClassLoader()));
		}
	}

public static void invokeBeanFactoryPostProcessors(
			ConfigurableListableBeanFactory beanFactory, List beanFactoryPostProcessors) {
    			String[] postProcessorNames =
					beanFactory.getBeanNamesForType(BeanDefinitionRegistryPostProcessor.class, true, false);//获取bean实现的BeanDefinitionRegistryPostProcessor接口名称
			for (String ppName : postProcessorNames) {
				if (beanFactory.isTypeMatch(ppName, PriorityOrdered.class)) {//先PriorityOrdered接口后面还有Ordered
					currentRegistryProcessors.add(beanFactory.getBean(ppName, BeanDefinitionRegistryPostProcessor.class));
					processedBeans.add(ppName);
				}
			}
			sortPostProcessors(currentRegistryProcessors, beanFactory);//对所有的BeanDefinitionRegsitryPostProcessors排序
			registryProcessors.addAll(currentRegistryProcessors);
			invokeBeanDefinitionRegistryPostProcessors(currentRegistryProcessors, registry, beanFactory.getApplicationStartup());//调用BeanDefinitonRegistryPostProcessor
			currentRegistryProcessors.clear();
}

上面这串代码只是这个方法的一部分.如果是用的AnnotationConfigApplicationContext那就会有一个用来解析配置bean的BeanDefinitionRegistryPostProcessor,ConfigurationClassPostProcessor就是说如果需要在BeanDifinition初始化完成后需要执行某些事情可以实现BeanDefinitionRegistryPostProcessor。