org.springframework.context.annotation.AnnotationConfigApplicationContext#addBeanFactoryPostProcessor ( )源码实例Demo

public static void main(String[] args) {

        // 创建 BeanFactory 容器
        AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
        // 注册 Configuration Class（配置类） -> Spring Bean
        applicationContext.register(ThreadLocalScopeDemo.class);

        applicationContext.addBeanFactoryPostProcessor(beanFactory -> {
            // 注册自定义 scope
            beanFactory.registerScope(ThreadLocalScope.SCOPE_NAME, new ThreadLocalScope());
        });

        // 启动 Spring 应用上下文
        applicationContext.refresh();

        scopedBeansByLookup(applicationContext);

        // 关闭 Spring 应用上下文
        applicationContext.close();
    }
 

public static void main(String[] args) {

        // 创建 BeanFactory 容器
        AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();

        // 注册 Configuration Class（配置类） -> Spring Bean
        applicationContext.register(ResolvableDependencySourceDemo.class);

        applicationContext.addBeanFactoryPostProcessor(beanFactory -> {
            // 注册 Resolvable Dependency
            beanFactory.registerResolvableDependency(String.class, "Hello,World");
        });

        // 启动 Spring 应用上下文
        applicationContext.refresh();

        // 显示地关闭 Spring 应用上下文
        applicationContext.close();
    }
 

AbstractApplicationContext createApplicationContext(Domain domain) {
    AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
    context.setParent(gatewayApplicationContext);
    context.setClassLoader(new ReactorHandlerClassLoader(gatewayApplicationContext.getClassLoader()));
    context.setEnvironment((ConfigurableEnvironment) gatewayApplicationContext.getEnvironment());

    PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
    configurer.setIgnoreUnresolvablePlaceholders(true);
    configurer.setEnvironment(gatewayApplicationContext.getEnvironment());
    context.addBeanFactoryPostProcessor(configurer);

    context.getBeanFactory().registerSingleton("domain", domain);
    context.register(HandlerConfiguration.class);
    context.setId("context-domain-" + domain.getId());
    context.refresh();

    return context;
}
 

AbstractApplicationContext createApplicationContext(Api api) {
    AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
    context.setParent(gatewayApplicationContext);
    context.setClassLoader(new ReactorHandlerClassLoader(gatewayApplicationContext.getClassLoader()));
    context.setEnvironment((ConfigurableEnvironment) gatewayApplicationContext.getEnvironment());

    PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
    configurer.setIgnoreUnresolvablePlaceholders(true);
    configurer.setEnvironment(gatewayApplicationContext.getEnvironment());
    context.addBeanFactoryPostProcessor(configurer);

    context.getBeanFactory().registerSingleton("api", api);
    context.register(ApiHandlerConfiguration.class);
    context.setId("context-api-" + api.getId());
    context.refresh();

    return context;
}
 

public static void main(String[] args) {

        // 创建 BeanFactory 容器
        AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
        // 注册 Configuration Class（配置类） -> Spring Bean
        applicationContext.register(BeanScopeDemo.class);

        applicationContext.addBeanFactoryPostProcessor(beanFactory -> {
            beanFactory.addBeanPostProcessor(new BeanPostProcessor() {

                @Override
                public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
                    System.out.printf("%s Bean 名称:%s 在初始化后回调...%n", bean.getClass().getName(), beanName);
                    return bean;
                }
            });
        });

        // 启动 Spring 应用上下文
        applicationContext.refresh();

        // 结论一：
        // Singleton Bean 无论依赖查找还是依赖注入，均为同一个对象
        // Prototype Bean 无论依赖查找还是依赖注入，均为新生成的对象

        // 结论二：
        // 如果依赖注入集合类型的对象，Singleton Bean 和 Prototype Bean 均会存在一个
        // Prototype Bean 有别于其他地方的依赖注入 Prototype Bean

        // 结论三：
        // 无论是 Singleton 还是 Prototype Bean 均会执行初始化方法回调
        // 不过仅 Singleton Bean 会执行销毁方法回调

        scopedBeansByLookup(applicationContext);

        scopedBeansByInjection(applicationContext);

        // 显示地关闭 Spring 应用上下文
        applicationContext.close();
    }
 

@Override
public void init(String... packages) {
    applicationContext = new AnnotationConfigApplicationContext();
    Config config= DefaultConfig.INSTANCE;
    ConfigBeanFactoryPostProcessor configBeanFactoryPostProcessor = new ConfigBeanFactoryPostProcessor(config);
    applicationContext.addBeanFactoryPostProcessor(configBeanFactoryPostProcessor);
    applicationContext.scan(packages);

}
 

@Override
public ProtocolProvider create(String type, ApplicationContext parentContext) {
    logger.debug("Looking for an protocol provider for [{}]", type);
    Protocol protocol = protocols.get(type);
    if (protocol != null) {
        try {
            ProtocolProvider protocolProvider = createInstance(protocol.protocolProvider());
            Plugin plugin = protocolPlugins.get(protocol);

            AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
            context.setParent(parentContext);
            context.setClassLoader(pluginClassLoaderFactory.getOrCreateClassLoader(plugin));
            context.setEnvironment((ConfigurableEnvironment) parentContext.getEnvironment());

            PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
            configurer.setIgnoreUnresolvablePlaceholders(true);
            configurer.setEnvironment(parentContext.getEnvironment());
            context.addBeanFactoryPostProcessor(configurer);

            context.register(protocol.configuration());
            context.registerBeanDefinition(plugin.clazz(), BeanDefinitionBuilder.rootBeanDefinition(plugin.clazz()).getBeanDefinition());
            context.refresh();

            context.getAutowireCapableBeanFactory().autowireBean(protocolProvider);

            if (protocolProvider instanceof InitializingBean) {
                ((InitializingBean) protocolProvider).afterPropertiesSet();
            }
            return protocolProvider;
        } catch (Exception ex) {
            logger.error("An unexpected error occurs while loading protocol", ex);
            return null;
        }
    } else {
        logger.error("No protocol provider is registered for type {}", type);
        throw new IllegalStateException("No protocol provider is registered for type " + type);
    }
}
 

private static void addPostprocessorAndUpdateContext(Class<?> currentVerticleClass,
    AnnotationConfigApplicationContext annotationConfigApplicationContext) {
    annotationConfigApplicationContext.addBeanFactoryPostProcessor(new SpringSingleVerticleConfiguration(currentVerticleClass));
    annotationConfigApplicationContext.refresh();
    annotationConfigApplicationContext.start();
    annotationConfigApplicationContext.registerShutdownHook();
}
 

public SpringContextSupport build(String[] packages) {

		applicationContext = new AnnotationConfigApplicationContext();

		applicationContext.scan(packages);

		applicationContext.addBeanFactoryPostProcessor(propertyPlaceholderConfigurerWith(providedProperties));
		applicationContext.refresh();


		return this;
	}