Spring脑图
2024-03-14 16:06:14 0 举报AI智能生成
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Spring笔记
Spring官网
作者：青水
<b>Spring IOC 核心实现</b>
准备工作
1. 注册内置的PostProcessor
this.reader = new AnnotatedBeanDefinitionReader(this)
internalConfigurationAnnotationProcessor ConfigurationClassPostProcessor
internalAutowiredAnnotationProcessor AutowiredAnnotationBeanPostProcessor
internalCommonAnnotationProcessor CommonAnnotationBeanPostProcessor
internalRequiredAnnotationProcessor RequiredAnnotationBeanPostProcessor
AnnotationAwareOrderComparator
ContextAnnotationAutowireCandidateResolver
internalEventListenerFactory DefaultEventListenerFactory
internalEventListenerProcessorEventListenerMethodProcessor
2. 注册扫描器
this.scanner = new ClassPathBeanDefinitionScanner(this)
3. 注册配置类
register(配置类.class)
refresh()
链接
执行BeanFactoryPostProcessor
解析BeanDefinition
invokeBeanFactoryPostProcessors(beanFactory)
eg：ConfigurationClassPostProcessor
注册BeanPostProcessor
refresh() registerBeanPostProcessors
AbstractBeanFactory.addBeanPostProcessor
invokeBeanFactoryPostProcessors
BeanPostProcessorChecker
AutowiredAnnotationBeanPostProcessor
RequiredAnnotationBeanPostProcessor
CommonAnnotationBeanPostProcessor
bean后置处理器的9处调用(bean创建过程 流程图里面有逻辑)
<span style="font-weight: normal;">Bean创建过程</span>
refresh()
finishBeanFactoryInitialization(beanFactory)
DefaultListableBeanFactory#preInstantiateSingletons
getBean()
doGetbean()
实例化
属性注入
注入时 出现循环依赖
初始化
监听器
创建事件多播器
initApplicationEventMulticaster()
new <font color="#32b334"><b>SimpleApplicationEventMulticaster</b></font>(beanFactory)
beanFactory.registerSingleton(<font color="#e74f4c">APPLICATION_EVENT_MULTICASTER_BEAN_NAME</font>, this.applicationEventMulticaster);
ApplicationListener接口的监听器解析过程
refresh() -> registerListeners
这里思考一个问题：为什么registerListeners注册了一遍监听器在，BeanPostProcerssor中又添加一次呢？
答案：为了懒加载的漏网之鱼！
注册ApplicationListenerDetector 这个BeanPostProcessor进行监听
@EventListener注解的解析过程
<font color="#e74f4c">AnnotatedBeanDefinitionReader</font>创建时注册bean
调用 <font color="#32b334"><b>EventListenerMethodProcessor</b></font>#afterSingletonsInstantiated来处理 @EventListener注解
<font color="#32b334">ApplicationContext</font>.addApplicationListener(applicationListener)
publishEvent
<font color="#000000" style="">入口 </font><font color="#32b334" style="font-weight: bold;">SimpleApplicationEventMulticaster</font>#multicastEvent
<b style=""><font color="#4669ea">实现ApplicationListener 接口</font></b>
<font color="#4669ea">直接调用</font>
<font color="#4669ea">ApplicationListener</font>#onApplicationEvent 具体事件
<font color="#32b334"><b>注解@EventListener的方式</b></font><br>
<font color="#32b334">代理调用</font>
<font color="#32b334">ApplicationListenerMethodAdapter</font>#onApplicationEvent
反射调用
this.<font color="#32b334">method.invoke</font>(bean, args)
Spring AOP 实现
注册自动代理功能
@EnableAspectJAutoProxy
AspectJAutoProxyRegistrar#registerBeanDefinitions
AopConfigUtils#<font color="#e74f4c">registerAspectJAnnotationAutoProxyCreatorIfNecessary</font>(BeanDefinitionRegistry)
关系结构图
AbstractAutoProxyCreator
InstantiationAwareBeanPostProcessor
postProcessBeforeInstantiation
BeanPostProcessor
postProcessAfterInitialization
SmartInstantiationAwareBeanPostProcessor
getEarlyBeanReference
AOP代理后置处理器的9处调用
注册自动代理后置处理器
注册后置处理(AnnotationAwareAspectJAutoProxyCreator)
AbstractApplicationContext#registerBeanPostProcessors
ConfigurableBeanFactory#addBeanPostProcessor
<font color="#ffffff">org.springframework.aop.config.internalAutoProxyCreatorAnnotationAwareAspectJAutoProxyCreator</font>
关键方法
解析切面
doCreateBean
AbstractAutowireCapableBeanFactory#resolveBeforeInstantiation
<font color="#e74f4c">InstantiationAwareBeanPostProcessor</font>#postProcessBeforeInstantiation
<font color="#e74f4c"><b>AbstractAutoProxyCreator </b> #postProcessBeforeInstantiation</font>
对bean创建动态代理
doCreateBean
AbstractAutowireCapableBeanFactory#initializeBean
<font color="#e74f4c">BeanPostProcessor </font> #postProcessAfterInitialization
<b><font color="#e74f4c">AbstractAutoProxyCreator </font></b>#postProcessAfterInitialization
<font color="#e74f4c">SmartInstantiationAwareBeanPostProcessor</font>#getEarlyBeanReference
<b><font color="#e74f4c">AbstractAutoProxyCreator </font></b>#getEarlyBeanReference
执行动态代理
org.springframework.aop.framework.AopProxy
org.springframework.aop.framework.<b><font color="#e74f4c">JdkDynamicAopProxy</font></b>
org.springframework.aop.framework.<b><font color="#e74f4c">CglibAopProxy</font></b>
Spring 事务实现
@EnableTransactionManagement
注册Selector <font color="#e74f4c">TransactionManagementConfigurationSelector</font>
AutoProxyRegistrar
org.springframework.aop.config.<font color="#e74f4c">internalAutoProxyCreator</font>
类结构
和 @EnableAspectJAutoProxy的关系
AbstractAutoProxyCreator 同上AOP逻辑
InstantiationAwareBeanPostProcessor
postProcessBeforeInstantiation
BeanPostProcessor
postProcessAfterInitialization
SmartInstantiationAwareBeanPostProcessor
getEarlyBeanReference
<font color="#e9d66f">@Configuration配置类 </font>ProxyTransactionManagementConfiguration
org.springframework.transaction.config.internalTransactionAdvisor
TransactionAttributeSource
TransactionInterceptor
解析切面(同上AOP)
事务切面解析
创建动态代理(同上AOP)
创建事务的动态代理
调用动态代理(同上AOP)
调用事务的实现
Spring 事务实现
@EnableTransactionManagement
注册Selector <font color="#e74f4c">TransactionManagementConfigurationSelector</font>
AutoProxyRegistrar
org.springframework.aop.config.<font color="#e74f4c">internalAutoProxyCreator</font>
类结构
和 @EnableAspectJAutoProxy的关系
AbstractAutoProxyCreator 同上AOP逻辑
InstantiationAwareBeanPostProcessor
postProcessBeforeInstantiation
BeanPostProcessor
postProcessAfterInitialization
SmartInstantiationAwareBeanPostProcessor
getEarlyBeanReference
<font color="#e9d66f">@Configuration配置类 </font>ProxyTransactionManagementConfiguration
org.springframework.transaction.config.internalTransactionAdvisor
TransactionAttributeSource
TransactionInterceptor
解析切面(同上AOP)
事务切面解析
创建动态代理(同上AOP)
创建事务的动态代理
调用动态代理(同上AOP)
调用事务的实现
Spring5新特性
JDK版本升级
spring-webflux
Kotlin函数式编程
spring-jcl
支持junit5
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