spring 解析流程

// 这里是 额外注册一些BeanDefinition的 //比如 springboot 中就这里扫面并注册BeanDefinition 比如在web中加入request session等 scope 等处理    postProcessBeanFactory(beanFactory); 

spring 流程

BeanDefinitionReaderUtils

// Last step: publish corresponding event.\t\t\t\tfinishRefresh();

public int loadBeanDefinitions(EncodedResource encodedResource) throws BeanDefinitionStoreException {    Set<EncodedResource> currentResources = this.resourcesCurrentlyBeingLoaded.get();  if (!currentResources.add(encodedResource)) {   throw new BeanDefinitionStoreException(     \"Detected cyclic loading of \" + encodedResource + \" - check your import definitions!\

注册器实现有很多 经典的是DefaultListableBeanFactory

AbstractApplicationContext.refresh()

BeanDefinitionDocumentReader 针对解析DocmentReader

@Override public int loadBeanDefinitions(Resource... resources) throws BeanDefinitionStoreException {  int count = 0;  for (Resource resource : resources) {      count += loadBeanDefinitions(resource);  }  return count; }

AbstractRefreshableApplicationContext

@Override protected final void refreshBeanFactory() throws BeansException {    //创建beanFactory 实例   DefaultListableBeanFactory beanFactory = createBeanFactory();   //设置Id   beanFactory.setSerializationId(getId());      customizeBeanFactory(beanFactory);  //解析xml 并且注册   loadBeanDefinitions(beanFactory);   this.beanFactory = beanFactory; }

BeanDefinitionDocumentReader

BeanDefinitionRegistry

解析的时候放入的

DefaultListableBeanFactory 这个类 很重要

这个BeanFactory 其实就是核心 ListableBeanFactory 是beanDefin 存放的地方AutowireCapableBeanFactory 创建bean 实例的实现

正在创建来源

// Invoke factory processors registered as beans in the context.//调用 实现了 BeanFactoryPostProcessor接口  主要用来添加beanFactory 属性 还有一个重要作用是 调用实现了 BeanDefinitionRegistryPostProcessor 接口的 这个是支持@config 等的关键    invokeBeanFactoryPostProcessors(beanFactory);

// Check for listener beans and register them.//注册所有 listener     registerListeners();

这里有很多实现其中包括最重要的 

BeanDefinitionParser 解析实现

BeanDefinitionReader

BeanDefinitionParserDelegate 标签解析

ClassPathBeanDefinitionScanner

ComponentScanBeanDefinitionParser

@Override public void preInstantiateSingletons() throws BeansException {  if (logger.isTraceEnabled()) {   logger.trace(\"Pre-instantiating singletons in \

AbstractXmlApplicationContext

PostProcessorRegistrationDelegate

// Instantiate all remaining (non-lazy-init) singletons.   //创建实例 非常重要 里面有很东西 要应用     finishBeanFactoryInitialization(beanFactory);

int loadBeanDefinitions(Resource resource) throws BeanDefinitionStoreException;

//注册必要的 BeanDefinitionRegistryPostProcessor 包括对 @config @bean @import BeanDefinitionRegistry 等支持

NamespaceHandler  

protected ConfigurableListableBeanFactory obtainFreshBeanFactory() {  //这里解析xml 抽象方法需要实现  refreshBeanFactory();   return getBeanFactory(); }

@SuppressWarnings(\"unchecked\

AbstractApplicationContext

// Prepare this context for refreshing.\t\t\tprepareRefresh();

// Initialize event multicaster for this context.// 初始化监听器    initApplicationEventMulticaster();

XmlBeanDefinitionReader

 AbstractAutowireCapableBeanFactory extends AbstractBeanFactory  implements AutowireCapableBeanFactory

创建bean实例

AnnotationConfigUtils

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

loadBeanDefinitions()

NamespaceHandlerSupport

AbstractBeanFactory

实现有很多只分析其中一个 如果要自定义名称空间即自己实现本接口即可

// Initialize message source for this context.  //国际化资源    initMessageSource();

刷新容器解析xml 为BeanDefinition

解析的实现类也很多负责具体解析其中的标签 

AbstractBeanDefinitionReader

// Initialize other special beans in specific context subclasses.  // 在spring boot 中这将会很有用    onRefresh(); 

ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();

/**  * Register each bean definition within the given root {@code <beans/>} element.  */ @SuppressWarnings(\"deprecation\