springboot

deduceMainApplicationClass()

implements

1、实例化SpringApplicationRunListener接口实现类

getRunListeners().starting()

configureHeadlessProperty

CloudFoundryVcapEnvironmentPostProcessor

异步调用onApplicationEvent

 EventPublishingRunListener构造函数         this.initialMulticaster = new SimpleApplicationEventMulticaster();         //获取ApplicationListener实现类列表listeners，add所有的listener到init

ConfigurableApplicationContext run(String... args)

createApplicationContext

loader()加载所有PropertySourceLoader实现类

方法

setListeners(Collection<? extends ApplicationListener<?>> listeners)设置将应用于SpringApplication并在ApplicationContext中注册的ApplicationListener。

SimpleApplicationEventMulticaster

SpringApplicationJsonEnvironmentPostProcessor

listeners=ApplicationListener.class

ApplicationContextInitializer所有实现类

SpringApplicationEvent

调用广播事件方法

2、执行starting

interface SpringApplicationRunListenerstarting()environmentPrepared(ConfigurableEnvironment environment)()running(ConfigurableApplicationContext context)started(ConfigurableApplicationContext context)

multicastEvent(ApplicationEvent event)

extents

调用SpringFactoriesLoader.loadFactories 加载并实例化EnvironmentPostProcessor实现类添加当前对象到加载列表

PropertiesPropertySourceLoader

deduceWebApplicationType()

class ConfigurationWarningsApplicationContextInitializer\t\timplements ApplicationContextInitializer<ConfigurableApplicationContext>

extends

setInitializers(Collection<? extends ApplicationContextInitializer<?>> initializers)设置将应用于SpringApplicationContext的ApplicationContextInitiator

new

onApplicationEvent

getSpringFactoriesInstances(Class<T> type)根据给定接口类，获取配置文件中的所有需要接口并实例化这些实现类

EnvironmentPostProcessorpostProcessEnvironment()

applyInitializers(ConfigurableApplicationContext context)initializer.initialize(context);将初始化时的ApplicationContextInitializer实例initializers列表迭代设置初始化context

调用

1、加载所有接口实现类2、调用postProcessEnvironment

class Loader 加载候选配置文件并配置有效配置

ApplicationListener实现类

ConfigurableApplicationContext

printBanner(ConfigurableEnvironment environment)

interface ApplicationListener<E extends ApplicationEvent> extends EventListenervoid onApplicationEvent(E event);//处理application event

postProcessEnvironment实现方法new Load().load()

interface Orderedint getOrder();//获取当前对象的序号

contextClass=Class.forName(AnnotationConfigServletWebServerApplicationContext)contextClass=Class.forName(AnnotationConfigReactiveWebServerApplicationContext)contextClass=Class.forName(AnnotationConfigApplicationContext)BeanUtils.instantiateClass(contextClass)

interface PropertySourceLoaderload()

onApplicationEnvironmentPreparedEvent

SystemEnvironmentPropertySourceEnvironmentPostProcessor

EventListener

context=createApplicationContext()

interface ApplicationContextInitializer<C extends ConfigurableApplicationContext>void initialize(C applicationContext);//初始化给定的application context

exceptionReporters=SpringBootExceptionReporter

class ConfigFileApplicationListener 处理配置文件类

ClearCachesApplicationListener implements ApplicationListener<ContextRefreshedEvent> 

class SpringApplication

配置环境调用

所有实现类

initializers=ApplicationContextInitializer.class

class  SpringFactoriesLoader

SpringApplicationRunListener

YamlPropertySourceLoader

loadSpringFactories(@Nullable ClassLoader classLoader)  加载META-INF/spring.factories文件