通常我们使用以下语句启用一个ioc容器 那么这段代码内部是怎么实现的呢？
ApplicationContext applicationContext = new AnnotationConfigApplicationContext(BeanConfig.class);
一. AnnotationConfigApplicationContext 类图
主要关注AnootationConfigApplicationContext 继承GenericApplicationContext 并创建了默认的beanFactory DefaultListableBeanFactory
二. 构造函数this()
this() :
1. 调用AnnotationConfigApplicationContext无参构造器
2. 调用父类GenericApplicationContext 无参构造器 实例化DefaultListableBeanFactory
3. 实例化AnnotatedBeanDefinitionReader 用于解析bean的注解信息
4.实例化ClassPathBeanDefinitionScanner
public AnnotationConfigApplicationContext(Class... annotatedClasses) {
// 调用无参构造器
// 父类 GenericApplicationContext 实例化了 DefaultListableBeanFactorythis();
// 注册配置类
register(annotatedClasses);
// 刷新ioc容器
refresh();
}
public GenericApplicationContext() {
//调用父类的无参构造器 创建了默认的DefaultListableBeanFactory
this.beanFactory = new DefaultListableBeanFactory();
}
public AnnotationConfigApplicationContext() {
//初始化了AnnotatedBeanDefinitionReader 和ClassPathBeanDefinitionScanner
this.reader = new AnnotatedBeanDefinitionReader(this);
this.scanner = new ClassPathBeanDefinitionScanner(this);
}
三. register(annotatedClasses) 注册配置类
1. 调用上一流程初始化的AnnotatedBeanDefinitionReader 的register方法
2.获取配置类的注解信息
3. 判断@Conditional 条件
4.判断Scope 若无则默认为单例模式
5. 在DefaultListableBeanFactory 注册一个 beanNane -> beanDefinition 的map 和alias -> beanName 的map
public void register(Class... annotatedClasses) {
for (Class annotatedClass : annotatedClasses) {
registerBean(annotatedClass);
}
}
public void registerBean(Class annotatedClass) {
doRegisterBean(annotatedClass, null, null, null);
}
/**
* Register a bean from the given bean class, deriving its metadata from
* class-declared annotations.
* @param annotatedClass the class of the bean
* @param instanceSupplier a callback for creating an instance of the bean
* (may be {@code null})
* @param name an explicit name for the bean
* @param qualifiers specific qualifier annotations to consider, if any,
* in addition to qualifiers at the bean class level
* @param definitionCustomizers one or more callbacks for customizing the
* factory's {@link BeanDefinition}, e.g. setting a lazy-init or primary flag
核心方法 注册配置类
* @since 5.0
*/
void doRegisterBean(Class annotatedClass, @Nullable Supplier instanceSupplier, @Nullable String name, @Nullable Class[] qualifiers, BeanDefinitionCustomizer... definitionCustomizers) {
// 创建AnnotatedGenericBeanDefinition 配置beanClass和 metaData（注解信息）
AnnotatedGenericBeanDefinition abd = new AnnotatedGenericBeanDefinition(annotatedClass);
//根据 @Conditional 注解 判断bean是否跳过注册
if (this.conditionEvaluator.shouldSkip(abd.getMetadata())) {
return;
}
// 设置Supplier 回调
abd.setInstanceSupplier(instanceSupplier);
// 解析Scope 注解 若无 则默认未singleton
ScopeMetadata scopeMetadata = this.scopeMetadataResolver.resolveScopeMetadata(abd);
// 设置scope
abd.setScope(scopeMetadata.getScopeName());
// 获取beanName
String beanName = (name != null ? name : this.beanNameGenerator.generateBeanName(abd, this.registry));
// 处理 lazy DependsOn Role Description parimary 这5个注解
AnnotationConfigUtils.processCommonDefinitionAnnotations(abd);
// 备案此调用qualifiers 为null 暂不讨论
if (qualifiers != null) {
for (Class qualifier : qualifiers) {
if (Primary.class == qualifier) {
abd.setPrimary(true);
}
else if (Lazy.class == qualifier) {
abd.setLazyInit(true);
}
else {
abd.addQualifier(new AutowireCandidateQualifier(qualifier));
}
}
}
//definitionCustomizers 也为null
for (BeanDefinitionCustomizer customizer : definitionCustomizers) {
customizer.customize(abd);
}
// 创建BeanDefinitionHolder 设置 beanDefinition beanName aliases 三个属性
BeanDefinitionHolder definitionHolder = new BeanDefinitionHolder(abd, beanName);
// 创建代理对象
definitionHolder = AnnotationConfigUtils.applyScopedProxyMode(scopeMetadata, definitionHolder, this.registry);
// 在DefaultListableBeanFactory 注册一个 beanNane -> beanDefinition 的map 和alias -> beanName 的map
BeanDefinitionReaderUtils.registerBeanDefinition(definitionHolder, this.registry);
}
四. refresh() 刷新容器
@Override
public void refresh()throws BeansException, IllegalStateException {
synchronized (this.startupShutdownMonitor) {
// Prepare this context for refreshing.
//1. 准备刷新容器
prepareRefresh();
// Tell the subclass to refresh the internal bean factory.
// 2.通知子类刷新内部beanFactory 并返回DefaultListableBeanFactory
ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();
// Prepare the bean factory for use in this context.
//3.给 DefaultListableFactoryBean 赋值 例如类加载器， post processors
prepareBeanFactory(beanFactory);
try {
// Allows post-processing of the bean factory in context subclasses.
// 空方法 交给子类实现
postProcessBeanFactory(beanFactory);
// Invoke factory processors registered as beans in the context.
// 4.执行已经注册的factory processors
invokeBeanFactoryPostProcessors(beanFactory);
// Register bean processors that intercept bean creation.
// 5.注册BeanPostProcessor,用于拦截bean创建过程
registerBeanPostProcessors(beanFactory);
// Initialize message source for this context.
//初始化MessageSource组件
initMessageSource();
// Initialize event multicaster for this context.
//定义事件多点广播
initApplicationEventMulticaster();
// Initialize other special beans in specific context subclasses.
// 子类实现
onRefresh();
// Check for listener beans and register them.
// 注册实现 org.spring.context.ApplicationListener 的bean
registerListeners();
// Instantiate all remaining (non-lazy-init) singletons.
//实例化所有单例类（不是懒加载）
finishBeanFactoryInitialization(beanFactory);
// Last step: publish corresponding event.
finishRefresh();
}
catch (BeansException ex) {
if (logger.isWarnEnabled()) {
logger.warn("Exception encountered during context initialization - " +
"cancelling refresh attempt: " + ex);
}
// Destroy already created singletons to avoid dangling resources.
destroyBeans();
// Reset 'active' flag.
cancelRefresh(ex);
// Propagate exception to caller.
throw ex;
}
finally {
// Reset common introspection caches in Spring's core, since we
// might not ever need metadata for singleton beans anymore...
resetCommonCaches();
}
}
}
1. prepareRefresh() 准备刷新容器
/**
* Prepare this context for refreshing, setting its startup date and
* active flag as well as performing any initialization of property sources.
*/
protected void prepareRefresh() {
// 设置启动时间
this.startupDate = System.currentTimeMillis();
// 设置状态
this.closed.set(false);
this.active.set(true);
if (logger.isDebugEnabled()) {
if (logger.isTraceEnabled()) {
logger.trace("Refreshing " +this);
}
else {
logger.debug("Refreshing " + getDisplayName());
}
}
// Initialize any placeholder property sources in the context environment
// 初始化Context属性资源 空方法 交给子类实现
initPropertySources();
// Validate that all properties marked as required are resolvable
// see ConfigurablePropertyResolver#setRequiredProperties
// 验证需要的属性
getEnvironment().validateRequiredProperties();
// Allow for the collection of early ApplicationEvents,
// to be published once the multicaster is available...
// 创建一个存在早期容器时间的Set
this.earlyApplicationEvents =new LinkedHashSet<>();
}
2. ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();
/**
* Tell the subclass to refresh the internal bean factory.
* @return the fresh BeanFactory instance
* @see #refreshBeanFactory()
* @see #getBeanFactory()
*/
protected ConfigurableListableBeanFactory obtainFreshBeanFactory() {
// 设置一个序列化id
refreshBeanFactory();
// 返回DefaultListableBeanFactory
return getBeanFactory();
}
/**
* Do nothing: We hold a single internal BeanFactory and rely on callers
* to register beans through our public methods (or the BeanFactory's).
* @see #registerBeanDefinition
*/
@Override
protected final void refreshBeanFactory() throws IllegalStateException {
if (!this.refreshed.compareAndSet(false, true)) {
throw new IllegalStateException(
"GenericApplicationContext does not support multiple refresh attempts: just call 'refresh' once");
}
// 设置序列化ID
this.beanFactory.setSerializationId(getId());
}
3. prepareBeanFactory(beanFactory)
给实例化的DefaultListableBeanFactory 添加默认属性 如classLoader,属性注册器,bean的后置处理器等
/**
* Configure the factory's standard context characteristics,
* such as the context's ClassLoader and post-processors.
* @param beanFactory the BeanFactory to configure
*/
protected void prepareBeanFactory(ConfigurableListableBeanFactory beanFactory) {
// Tell the internal bean factory to use the context's class loader etc.
// 设置classLoader Launcher
beanFactory.setBeanClassLoader(getClassLoader());
//
beanFactory.setBeanExpressionResolver(new StandardBeanExpressionResolver(beanFactory.getBeanClassLoader()));
// 添加属性注册器
beanFactory.addPropertyEditorRegistrar(new ResourceEditorRegistrar(this, getEnvironment()));
// Configure the bean factory with context callbacks.
// 添加后置处理器
beanFactory.addBeanPostProcessor(new ApplicationContextAwareProcessor(this));
// 1. ignoreDependencyInterface的真正意思是在自动装配时忽略指定接口的实现类中，对外的依赖。 https://www.jianshu.com/p/3c7e0608ff1f
beanFactory.ignoreDependencyInterface(EnvironmentAware.class);
beanFactory.ignoreDependencyInterface(EmbeddedValueResolverAware.class);
beanFactory.ignoreDependencyInterface(ResourceLoaderAware.class);
beanFactory.ignoreDependencyInterface(ApplicationEventPublisherAware.class);
beanFactory.ignoreDependencyInterface(MessageSourceAware.class);
beanFactory.ignoreDependencyInterface(ApplicationContextAware.class);
// BeanFactory interface not registered as resolvable type in a plain factory.
// MessageSource registered (and found for autowiring) as a bean.
// 设置依赖类-> 自动装配的类的映射
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.
//将早期后处理器注册为application监听器，用于检测内部bean。
beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(this));
// Detect a LoadTimeWeaver and prepare for weaving, if found.
// 添加编译时的AspectJ
if (beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
beanFactory.addBeanPostProcessor(new LoadTimeWeaverAwareProcessor(beanFactory));
// Set a temporary ClassLoader for type matching.
beanFactory.setTempClassLoader(new ContextTypeMatchClassLoader(beanFactory.getBeanClassLoader()));
}
// Register default environment beans.
// 设置默认的环境变量组件ConfigurableEnvironment、systemProperties、systemEnvironment
if (!beanFactory.containsLocalBean(ENVIRONMENT_BEAN_NAME)) {
beanFactory.registerSingleton(ENVIRONMENT_BEAN_NAME, getEnvironment());
}
if (!beanFactory.containsLocalBean(SYSTEM_PROPERTIES_BEAN_NAME)) {
beanFactory.registerSingleton(SYSTEM_PROPERTIES_BEAN_NAME, getEnvironment().getSystemProperties());
}
if (!beanFactory.containsLocalBean(SYSTEM_ENVIRONMENT_BEAN_NAME)) {
beanFactory.registerSingleton(SYSTEM_ENVIRONMENT_BEAN_NAME, getEnvironment().getSystemEnvironment());
}
}
4. invokeBeanFactoryPostProcessors(beanFactory) 执行beanFactory后置处理器
执行流程：
1.根据类实现的接口（PriorityOrdered, Ordered，未实现）分离BeanDefinitionRegistryPostProcessors
执行顺序 PriorityOrdered > Order>未实现Order接口
2.对分离后的BeanDefinitionRegistryPostProcessors 按优先级排序（getOrder 返回的值越大 优先级越高）
3. 执行每个BeanDefinitionRegistryPostProcessors 的postProcessBeanDefinitionRegistry方法
4. 所有BeanDefinitionRegistryPostProcessors 分离完成且执行postProcessBeanDefinitionRegistry后 调用所有已注册的processors 的 postProcessBeanFactory方法
5. 按同样逻辑分离分离BeanFactoryPostProcessors (注：上面分离的是BeanDefinitionRegistryPostProcessor)
6. 执行每个BeanFactoryPostProcessors 的 postProcessBeanFactory
protected void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory) {
// 执行invokeBeanFactoryPostProcessors
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 (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) { // Invoke BeanDefinitionRegistryPostProcessors first, if any.
Set
processedBeans = new HashSet<>(); // 判断是否时BeanDefinitionRegistry
if (beanFactory instanceof BeanDefinitionRegistry) {
BeanDefinitionRegistry registry = (BeanDefinitionRegistry) beanFactory;
List
regularPostProcessors = new ArrayList<>(); List
registryProcessors = new ArrayList<>(); for (BeanFactoryPostProcessor postProcessor : beanFactoryPostProcessors) {
if (postProcessor instanceof BeanDefinitionRegistryPostProcessor) {
BeanDefinitionRegistryPostProcessor registryProcessor =
(BeanDefinitionRegistryPostProcessor) postProcessor;
registryProcessor.postProcessBeanDefinitionRegistry(registry);
registryProcessors.add(registryProcessor);
}
else {
regularPostProcessors.add(postProcessor);
}
}
// Do not initialize FactoryBeans here: We need to leave all regular beans
// uninitialized to let the bean factory post-processors apply to them!
// Separate between BeanDefinitionRegistryPostProcessors that implement
// PriorityOrdered, Ordered, and the rest.
// 根据后置处理器实现的接口 riorityOrdered, Ordered / 普通类 分离BeanDefinitionRegistryPostProcessors
List
currentRegistryProcessors = new ArrayList<>(); // First, invoke the BeanDefinitionRegistryPostProcessors that implement PriorityOrdered.
// 首先执行实现PriorityOrdered 的类
String[] postProcessorNames =
beanFactory.getBeanNamesForType(BeanDefinitionRegistryPostProcessor.class, true, false);
// 实例化实现PriorityOrdered 的类
for (String ppName : postProcessorNames) {
if (beanFactory.isTypeMatch(ppName, PriorityOrdered.class)) {
currentRegistryProcessors.add(beanFactory.getBean(ppName, BeanDefinitionRegistryPostProcessor.class));
processedBeans.add(ppName);
}
}
// 根据优先级排序
sortPostProcessors(currentRegistryProcessors, beanFactory);
registryProcessors.addAll(currentRegistryProcessors);
// 执行每个currentRegistryProcessors的 postProcessBeanDefinitionRegistry方法
invokeBeanDefinitionRegistryPostProcessors(currentRegistryProcessors, registry);
currentRegistryProcessors.clear();
// Next, invoke the BeanDefinitionRegistryPostProcessors that implement Ordered.
// 实例化实现Ordered 的类
postProcessorNames = beanFactory.getBeanNamesForType(BeanDefinitionRegistryPostProcessor.class, true, false);
for (String ppName : postProcessorNames) {
if (!processedBeans.contains(ppName) && beanFactory.isTypeMatch(ppName, Ordered.class)) {
currentRegistryProcessors.add(beanFactory.getBean(ppName, BeanDefinitionRegistryPostProcessor.class));
processedBeans.add(ppName);
}
}
sortPostProcessors(currentRegistryProcessors, beanFactory);
registryProcessors.addAll(currentRegistryProcessors);
invokeBeanDefinitionRegistryPostProcessors(currentRegistryProcessors, registry);
currentRegistryProcessors.clear();
// Finally, invoke all other BeanDefinitionRegistryPostProcessors until no further ones appear.
boolean reiterate = true;
while (reiterate) {
reiterate = false;
postProcessorNames = beanFactory.getBeanNamesForType(BeanDefinitionRegistryPostProcessor.class, true, false);
for (String ppName : postProcessorNames) {
if (!processedBeans.contains(ppName)) {
currentRegistryProcessors.add(beanFactory.getBean(ppName, BeanDefinitionRegistryPostProcessor.class));
processedBeans.add(ppName);
reiterate = true;
}
}
sortPostProcessors(currentRegistryProcessors, beanFactory);
registryProcessors.addAll(currentRegistryProcessors);
invokeBeanDefinitionRegistryPostProcessors(currentRegistryProcessors, registry);
currentRegistryProcessors.clear();
}
// Now, invoke the postProcessBeanFactory callback of all processors handled so far.
// 调用所有已经注册的 processors postProcessBeanFactory
invokeBeanFactoryPostProcessors(registryProcessors, beanFactory);
invokeBeanFactoryPostProcessors(regularPostProcessors, beanFactory);
}
else {
// Invoke factory processors registered with the context instance.
invokeBeanFactoryPostProcessors(beanFactoryPostProcessors, beanFactory);
}
// Do not initialize FactoryBeans here: We need to leave all regular beans
// uninitialized to let the bean factory post-processors apply to them!
String[] postProcessorNames =
beanFactory.getBeanNamesForType(BeanFactoryPostProcessor.class, true, false);
// Separate between BeanFactoryPostProcessors that implement PriorityOrdered,
// Ordered, and the rest.
List
priorityOrderedPostProcessors = new ArrayList<>(); List
orderedPostProcessorNames = new ArrayList<>(); List
nonOrderedPostProcessorNames = new ArrayList<>(); for (String ppName : postProcessorNames) {
if (processedBeans.contains(ppName)) {
// skip - already processed in first phase above
}
else if (beanFactory.isTypeMatch(ppName, PriorityOrdered.class)) {
priorityOrderedPostProcessors.add(beanFactory.getBean(ppName, BeanFactoryPostProcessor.class));
}
else if (beanFactory.isTypeMatch(ppName, Ordered.class)) {
orderedPostProcessorNames.add(ppName);
}
else {
nonOrderedPostProcessorNames.add(ppName);
}
}
// First, invoke the BeanFactoryPostProcessors that implement PriorityOrdered.
sortPostProcessors(priorityOrderedPostProcessors, beanFactory);
invokeBeanFactoryPostProcessors(priorityOrderedPostProcessors, beanFactory);
// Next, invoke the BeanFactoryPostProcessors that implement Ordered.
List
orderedPostProcessors = new ArrayList<>(); for (String postProcessorName : orderedPostProcessorNames) {
orderedPostProcessors.add(beanFactory.getBean(postProcessorName, BeanFactoryPostProcessor.class));
}
sortPostProcessors(orderedPostProcessors, beanFactory);
invokeBeanFactoryPostProcessors(orderedPostProcessors, beanFactory);
// Finally, invoke all other BeanFactoryPostProcessors.
List
nonOrderedPostProcessors = new ArrayList<>(); for (String postProcessorName : nonOrderedPostProcessorNames) {
nonOrderedPostProcessors.add(beanFactory.getBean(postProcessorName, BeanFactoryPostProcessor.class));
}
invokeBeanFactoryPostProcessors(nonOrderedPostProcessors, beanFactory);
// Clear cached merged bean definitions since the post-processors might have
// modified the original metadata, e.g. replacing placeholders in values...
beanFactory.clearMetadataCache();
}
5.registerBeanPostProcessors(beanFactory)注册BeanPostProcessor
1. 获取beanFactory中所有实现的beanPostProcessor
2.注册一个BeanPostProcessorChecker 来记录info信息
3.根据类实现的接口（PriorityOrdered, Ordered，未实现）分离 BeanPostProcessors ,并将MergedBeanDefinitionPostProcessor 单独归为一类
4.排序并注册
5.重新注册所有的MergedBeanDefinitionPostProcessor
6.重新注册 ApplicationListenerDetector
AbstractApplicationContext.java :
/**
* Instantiate and invoke all registered BeanPostProcessor beans,
* respecting explicit order if given.
*
Must be called before any instantiation of application beans.
* 实例化并且执行所有已经注册的的bean后置处理器，若提供顺序 则按照顺序
*/
protected void registerBeanPostProcessors(ConfigurableListableBeanFactory beanFactory) {
PostProcessorRegistrationDelegate.registerBeanPostProcessors(beanFactory, this);
}
PostProcessorRegistrationDelegate.java :
public static void registerBeanPostProcessors(
ConfigurableListableBeanFactory beanFactory, AbstractApplicationContext applicationContext) {
String[] postProcessorNames = beanFactory.getBeanNamesForType(BeanPostProcessor.class, true, false);
// Register BeanPostProcessorChecker that logs an info message when
// a bean is created during BeanPostProcessor instantiation, i.e. when
// a bean is not eligible for getting processed by all BeanPostProcessors.
// 注册一个BeanPostProcessorChecker 来记录info信息 当这个bean在BeanPostProcessor实例化期间被创建
// 也就是一个bean不适合被所有的BeanPostProcessors所加工
int beanProcessorTargetCount = beanFactory.getBeanPostProcessorCount() + 1 + postProcessorNames.length;
beanFactory.addBeanPostProcessor(new BeanPostProcessorChecker(beanFactory, beanProcessorTargetCount));
// Separate between BeanPostProcessors that implement PriorityOrdered,
// Ordered, and the rest.
// 根据后置处理器实现的接口 riorityOrdered, Ordered / 普通类 分离beanPostProcessor 注 前一个流程分离的是BeanDefinitionRegistryPostProcessor
List
priorityOrderedPostProcessors = new ArrayList<>(); List
internalPostProcessors = new ArrayList<>(); List
orderedPostProcessorNames = new ArrayList<>(); List
nonOrderedPostProcessorNames = new ArrayList<>(); for (String ppName : postProcessorNames) {
if (beanFactory.isTypeMatch(ppName, PriorityOrdered.class)) {
// 若为优先级别 则创建
BeanPostProcessor pp = beanFactory.getBean(ppName, BeanPostProcessor.class);
priorityOrderedPostProcessors.add(pp);
if (pp instanceof MergedBeanDefinitionPostProcessor) {
internalPostProcessors.add(pp);
}
}
else if (beanFactory.isTypeMatch(ppName, Ordered.class)) {
orderedPostProcessorNames.add(ppName);
}
else {
nonOrderedPostProcessorNames.add(ppName);
}
}
// First, register the BeanPostProcessors that implement PriorityOrdered.
// 按照有限级别排序
sortPostProcessors(priorityOrderedPostProcessors, beanFactory);
// 注册beanProcessors
registerBeanPostProcessors(beanFactory, priorityOrderedPostProcessors);
// Next, register the BeanPostProcessors that implement Ordered.
List
orderedPostProcessors = new ArrayList<>(); for (String ppName : orderedPostProcessorNames) {
BeanPostProcessor pp = beanFactory.getBean(ppName, BeanPostProcessor.class);
orderedPostProcessors.add(pp);
if (pp instanceof MergedBeanDefinitionPostProcessor) {
internalPostProcessors.add(pp);
}
}
sortPostProcessors(orderedPostProcessors, beanFactory);
registerBeanPostProcessors(beanFactory, orderedPostProcessors);
// Now, register all regular BeanPostProcessors.
List
nonOrderedPostProcessors = new ArrayList<>(); for (String ppName : nonOrderedPostProcessorNames) {
BeanPostProcessor pp = beanFactory.getBean(ppName, BeanPostProcessor.class);
nonOrderedPostProcessors.add(pp);
if (pp instanceof MergedBeanDefinitionPostProcessor) {
internalPostProcessors.add(pp);
}
}
registerBeanPostProcessors(beanFactory, nonOrderedPostProcessors);
// Finally, re-register all internal BeanPostProcessors.
sortPostProcessors(internalPostProcessors, beanFactory);
registerBeanPostProcessors(beanFactory, internalPostProcessors);
// Re-register post-processor for detecting inner beans as ApplicationListeners,
// moving it to the end of the processor chain (for picking up proxies etc).
beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(applicationContext));
}