整体位置

调用DefaultListableBeanFactory.registerBeanDefinition
5 6次
6 1次 入口主文件
10 140多次,包括自动配置类,自定义注解那些(最多)
16 1次org.springframework.aop.config.internalAutoProxyCreator
上游1

public class AnnotationConfigServletWebServerApplicationContext extends ServletWebServerApplicationContext    implements AnnotationConfigRegistry {
    public AnnotationConfigServletWebServerApplicationContext() {
        this.reader = new AnnotatedBeanDefinitionReader(this);//1
        this.scanner = new ClassPathBeanDefinitionScanner(this);
    }
    @Override
    public void registerBeanDefinition(String beanName, BeanDefinition beanDefinition)throws BeanDefinitionStoreException {
        //org.springframework.context.annotation.internalConfigurationAnnotationProcessor
        //org.springframework.context.annotation.internalAutowiredAnnotationProcessor
        //org.springframework.context.annotation.internalCommonAnnotationProcessor
        //org.springframework.context.event.internalEventListenerProcessor
        //org.springframework.context.event.internalEventListenerFactory
        //springbootUploadApplication
        this.beanFactory.registerBeanDefinition(beanName, beanDefinition);//5
    }
}
public AnnotatedBeanDefinitionReader(BeanDefinitionRegistry registry, Environment environment) {
        Assert.notNull(registry, "BeanDefinitionRegistry must not be null");
        Assert.notNull(environment, "Environment must not be null");
        this.registry = registry;
        this.conditionEvaluator = new ConditionEvaluator(registry, environment, null);
        AnnotationConfigUtils.registerAnnotationConfigProcessors(this.registry);//2
}
//注册BeanPostProcessor/BeanFactoryPostProcessor/AutowireCandidateResolver
public abstract class AnnotationConfigUtils {
    //3
    private static BeanDefinitionHolder registerPostProcessor(BeanDefinitionRegistry registry, RootBeanDefinition definition, String beanName) {
        definition.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
        //4
        registry.registerBeanDefinition(beanName, definition);//这个registry就是AnnotationConfigServletWebServerApplicationContext,回到了上面
        return new BeanDefinitionHolder(definition, beanName);
    }
}

上游2
起始11#invokeBeanFactoryPostProcessors
AnnotationConfigServletWebServerApplicationContext.invokeBeanFactoryPostProcessors
PostProcessorRegistrationDelegate#invokeBeanFactoryPostProcessors #invokeBeanDefinitionRegistryPostProcessors
ConfigurationClassPostProcessor#postProcessBeanDefinitionRegistry #processConfigBeanDefinitions
分支1 自定义@Controller @Configuration
ConfigurationClassParser#parse #processConfigurationClass #doProcessConfigurationClass
ComponentScanAnnotationParser#parse
ClassPathBeanDefinitionScanner#doScan #registerBeanDefinition
BeanDefinitionReaderUtils#registerBeanDefinition
终于DefaultListableBeanFactory.registerBeanDefinition
分支2 myServlet myFilter myListener servletComponentRegisteringPostProcessor
ConfigurationClassBeanDefinitionReader#loadBeanDefinitions 遍历#loadBeanDefinitionsForConfigurationClass #loadBeanDefinitionsForBeanMethod #this.registry.registerBeanDefinition(beanName, beanDefToRegister);
终于DefaultListableBeanFactory.registerBeanDefinition
分支3
ConfigurationClassBeanDefinitionReader#loadBeanDefinitionsForConfigurationClass #loadBeanDefinitionsFromRegistrars
ServletComponentScanRegistrar#registerBeanDefinitions #registerBeanDefinitions #addPostProcessor
终于DefaultListableBeanFactory.registerBeanDefinition
分支4 org.springframework.boot.autoconfigure.AutoConfigurationPackages
ConfigurationClassBeanDefinitionReader#loadBeanDefinitionsFromRegistrars
org.springframework.boot.autoconfigure.AutoConfigurationPackages.Registrar#registerBeanDefinitions #registerBeanDefinitions #register
终于DefaultListableBeanFactory.registerBeanDefinition
分支5 org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration

分支6 dispatcherServlet
ConfigurationClassBeanDefinitionReader#loadBeanDefinitionsForBeanMethod
核心代码

作为AnnotationConfigServletWebServerApplicationContext的一个属性
public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFactory    implements ConfigurableListableBeanFactory, BeanDefinitionRegistry, Serializable {
    /** List of bean definition names, in registration order.存储Bean名称 */
    private volatile List<String> beanDefinitionNames = new ArrayList<>(256);
    /** Map of bean definition objects, keyed by bean name. map存储Bean名称和Bean定义*/
    private final Map<String, BeanDefinition> beanDefinitionMap = new ConcurrentHashMap<>(256);
    //6
    @Override
    public void registerBeanDefinition(String beanName, BeanDefinition beanDefinition)    throws BeanDefinitionStoreException {
        //所有注册Bean都会经过这里!!
        //部分逻辑
            if (hasBeanCreationStarted()) {
                // Cannot modify startup-time collection elements anymore (for stable iteration)
                synchronized (this.beanDefinitionMap) {
                    this.beanDefinitionMap.put(beanName, beanDefinition);
                    List<String> updatedDefinitions = new ArrayList<>(this.beanDefinitionNames.size() + 1);
                    updatedDefinitions.addAll(this.beanDefinitionNames);
                    updatedDefinitions.add(beanName);
                    this.beanDefinitionNames = updatedDefinitions;
                    removeManualSingletonName(beanName);
                }
            }
            else {
                // Still in startup registration phase
                this.beanDefinitionMap.put(beanName, beanDefinition);
                this.beanDefinitionNames.add(beanName);
                removeManualSingletonName(beanName);
            }
    }
}

总结下关系:

• 所有注册Bean的入口就是DefaultListableBeanFactory#registerBeanDefinition(String beanName, BeanDefinition beanDefinition)
• 真正的容器在于AnnotationConfigServletWebServerApplicationContext#属性private final DefaultListableBeanFactory beanFactory;

  类图

  
  应用vs容器

  真正类
  public class AnnotationConfigServletWebServerApplicationContext extends ServletWebServerApplicationContext
        implements AnnotationConfigRegistry 
  祖父   
  public class GenericApplicationContext extends AbstractApplicationContext implements BeanDefinitionRegistry {
    //存放Bean对象的东西
    private final DefaultListableBeanFactory beanFactory;
  }
  //存放Bean对象的东西
  public class DefaultListableBeanFactory{
    /** Map from dependency type to corresponding autowired value. */
    private final Map<Class<?>, Object> resolvableDependencies = new ConcurrentHashMap<>(16);
    /** Map of bean definition objects, keyed by bean name. */
    private final Map<String, BeanDefinition> beanDefinitionMap = new ConcurrentHashMap<>(256);
    /** Map from bean name to merged BeanDefinitionHolder. */
    private final Map<String, BeanDefinitionHolder> mergedBeanDefinitionHolders = new ConcurrentHashMap<>(256);
    /** Map of singleton and non-singleton bean names, keyed by dependency type. */
    private final Map<Class<?>, String[]> allBeanNamesByType = new ConcurrentHashMap<>(64);
    /** Map of singleton-only bean names, keyed by dependency type. */
    private final Map<Class<?>, String[]> singletonBeanNamesByType = new ConcurrentHashMap<>(64);
    /** List of bean definition names, in registration order. */
    private volatile List<String> beanDefinitionNames = new ArrayList<>(256);
    /** List of names of manually registered singletons, in registration order. */
    private volatile Set<String> manualSingletonNames = new LinkedHashSet<>(16);
    /** Cached array of bean definition names in case of frozen configuration. */
    @Nullable
    private volatile String[] frozenBeanDefinitionNames;
  }

桃园三结义

AnnotationConfigServletWebServerApplicationContext

BeanDefinition

BeanPostProcessor