springBoot与Spring源码分析

springBoot扩展点ApplicationRunnerCommandLineRunner

预留方法，用于扩展

ConfigurableEnvironment environment = getOrCreateEnvironment()

AnnotationConfigApplicationContext(Class)

ConfigurationPropertySources.attach(environment)

reader  1.定义BeanDefinitionRegistry  DefaultListableBeanFactory  2.BeanFactory后置处理器   xxxBeanFactoryPostProcessorscanner  1.默认扫描注解       @Component、继承@Component、@Named、@ManagedBean监听器处理器，处理@EventListnerEventListenerMethodProcessorDefaultEventListenerFactory

applyInitializers(context)

// Add boot specific singleton beansConfigurableListableBeanFactory beanFactory = context.getBeanFactory();

<build><plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring‐boot‐maven‐plugin</artifactId> </plugin> </plugins> </build>生成fatjar

this()

bindToSpringApplication(environment)

1.获取Log日志实现2.获取spring.profiles.active

设置环境信息StandardServletEnvironment

listeners.started(context);

1.this.webApplicationType = WebApplicationType.deduceFromClasspath();2.setInitializers((Collection) getSpringFactoriesInstances(ApplicationContextInitializer.class));3.setListeners((Collection) getSpringFactoriesInstances(ApplicationListener.class));

获取beanFactory  设置属性beanFactory.registerSingleton(\"springApplicationArguments\

SpringBoot启动原理分析

postProcessApplicationContext(context)

添加默认扫描注解：@ManagedBean  JSR-250@Name  JSR-330@Component

ConfigurationClassPostProcessorAutowiredAnnotationBeanPostProcessorCommonAnnotationBeanPostProcessor监听器处理器，处理@EventListnerEventListenerMethodProcessorDefaultEventListenerFactoryDefaultListableBeanFactory 设置属性    AnnotationAwareOrderComparator    ContextAnnotationAutowireCandidateResolver 

this.scanner=new ClassPathBeanDefinitionScanner(this)

refreshContext(context)

没看明白有啥JB用

manifest文件Main-class:start-class:

initApplicationEventMulticaster()

springApplication设置环境信息

发布事件

1.设置属性 @Primary @Lazy @

invokeBeanFactoryPostProcessors(beanFactory)

run(args)

context设置环境信息

注册ConfigurableListableBeanFactory

获取ApplicationContextInitializer  执行Initializer方法spring-boot-autoconfiguer  添加BeanFactoryPostProcessor  -> SharedMetadataReaderFactoryContextInitializer   添加监听器 ->  ConditionEvaluationReportLoggingListenerspring-boot  添加BeanFactoryPostProcessor -> ConfigurationWarningsApplicationContextInitializer  注册ContextId -> ContextIdApplicationContextInitializer  初始化配置项 context.initializer.classes  -> DelegatingApplicationContextInitializer  ServerPortInfoApplicationContextInitializer -> 设置 local.server.port属性

getRunListeners(args)

发布spring.factories部分类

this.reader=new AnnotatedBeanDefinitionReader(this)

扩展BeanFactoryPostProcessorsgetBeanFactoryPostProcessors()，需要手动调用：AbstractApplicationContext.addBeanFactoryPostProcessor

加载spring.factories文件1.加载ApplicationListener2.加载配置文件*.properties

listeners.environmentPrepared(environment)

封装参数applicationArguments用于解析启动命令的参数

设置的默认配置文件到environment

注册多播器如果实现：ApplicationEventMulticaster否则默认：SimpleApplicationEventMulticasterSpring事件体系：事件、监听器、广播

finishBeanFactoryInitialization

ApplicationArguments applicationArguments = new DefaultApplicationArguments(args)

register(componentClasses)

根据webApplicationType实例化：ConfigurableApplicationContextAnnotationConfigServletWebServerApplicationContextthis.reader = new AnnotatedBeanDefinitionReader(this);this.scanner = new ClassPathBeanDefinitionScanner(this);

用于加载jar包里面的jar

JarLauncher 类加载器

this.reader.register(componentClasses);

webApplicationType

context.setEnvironment(environment)

SpringBoot 通过Jar启动

if (this.logStartupInfo) {  logStartupInfo(context.getParent() == null);  logStartupProfileInfo(context);}

执行refresh方法

AnnotationConfigUtils#registerAnnotationConfigProcessors

1.推断当前容器类型，默认servlet2.设置初始化类型3.设置监听器

监听器设置环境信息

context 设置属性ResourceLoader、ClassLoader、ConversionService

mvn插件

registerDefaultFilters

设置spring.beaninfo.ignore属性（这JB属性不知道有啥用）

createApplicationContext()

Spring源码解析

refresh()

new SpringApplication(primarySources).run(args)

完成Bean注册

ConditionEvaluator

configureIgnoreBeanInfo(environment);

finishRefresh()

调用run方法

listeners.starting()

new SpringApplication(primarySources)

检测是MutablePropertySources   有  configurationProperties属性  移除   添加 configurationProperties 属性 即为配置文件