记录一次springboot启动流程不完整版

1.Sort ApplicationInitializer:

2.sort Listener:

3.getRunListener:

4.eventPublishingRunListener.starting 发布启动中事件；

构建 ApplicationArguments 参数，

4.1prepareEnvement:

[StubPropertySource {name='servletConfigInitParams'},

StubPropertySource {name='servletContextInitParams'},

PropertiesPropertySource {name='systemProperties'},

SystemEnvironmentPropertySource {name='systemEnvironment'}]

5.eventPublistRunlistener.environmentPrepared （环境变量）发布环境已经准备好了的事件：

propertySources:[

ConfigurationPropertySourcesPropertySource {name='configurationProperties'},

StubPropertySource {name='servletConfigInitParams'},

StubPropertySource {name='servletContextInitParams'},

PropertiesPropertySource {name='systemProperties'},

SystemEnvironmentPropertySource {name='systemEnvironment'}]

最后返回的environment如下：

[ConfigurationPropertySourcesPropertySource {name='configurationProperties'},

MapPropertySource {name='bootstrap'},

PropertiesPropertySource {name='systemProperties'},

OriginAwareSystemEnvironmentPropertySource {name='systemEnvironment'}, RandomValuePropertySource {name='random'},

MapPropertySource {name='springCloudClientHostInfo'},

OriginTrackedMapPropertySource {name='applicationConfig: [classpath:/bootstrap.yml]'}]

6.创建ConfigurableApplicationContext ,这里只是通过构造函数创建一个基本对象

7.prepareContext 准备容器内容，

入参（ConfigurableApplicationContext context, ConfigurableEnvironment environment, SpringApplicationRunListeners listeners, ApplicationArguments applicationArguments, Banner printedBanner）

context.setEnvironment(environment); 容器设置环境信息
postProcessApplicationContext（ConfigurableApplicationContext context）对容器增强
对AbstractBeanFactory设置beanNameGenerator ,用来生成beanName的
对AbstractBeanFactory设置resourceLoader 加载资源文件的
对AbstractBeanFactory设置类型转换器，用来转换不同数据类型或对对象的
调用applyInitializers ，对initializer进行调用初始化。
listeners.contextPrepared(context); 最后又广播出去ApplicationContextInitializedEvent事件
从容器中获取 ConfigurableListableBeanFactory
向容器中注册springApplicationArguments
设置setAllowBeanDefinitionOverriding
添加ddBeanFactoryPostProcessor------>LazyInitializationBeanFactoryPostProcessor implements BeanFactoryPostProcessor
获取所有source

其中包括BootstrapImportSelectorConfiguration

这里重点是将spring.factories中的BootstrapConfiguration和环境中配置的spring.cloud.bootstrap.sources 进行合并，然后排序，然后返回。。相当于给容器中注入了bean!
image

执行this.load(context, sources.toArray(new Object[0]))；

 protected void load(ApplicationContext context, Object[] sources) {
        if (logger.isDebugEnabled()) {
            logger.debug("Loading source " + StringUtils.arrayToCommaDelimitedString(sources));
        }

        BeanDefinitionLoader loader = this.createBeanDefinitionLoader(this.getBeanDefinitionRegistry(context), sources);
        if (this.beanNameGenerator != null) {
            loader.setBeanNameGenerator(this.beanNameGenerator);
        }

        if (this.resourceLoader != null) {
            loader.setResourceLoader(this.resourceLoader);
        }

        if (this.environment != null) {
            loader.setEnvironment(this.environment);
        }

        loader.load();
    }

private int load(Object source) {
        Assert.notNull(source, "Source must not be null");
        if (source instanceof Class) {
            return this.load((Class)source);
        } else if (source instanceof Resource) {
            return this.load((Resource)source);
        } else if (source instanceof Package) {
            return this.load((Package)source);
        } else if (source instanceof CharSequence) {
            return this.load((CharSequence)source);
        } else {
            throw new IllegalArgumentException("Invalid source type " + source.getClass());
        }
    }