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

@Override
    public ConfigurableApplicationContext createApplicationContext() {
        setWebApplicationType(WebApplicationType.NONE);
        AnnotationConfigApplicationContext applicationContext =
                (AnnotationConfigApplicationContext) super.createApplicationContext();
//        applicationContext.setParent(mainApplicationContext);
        hackBeanFactory(applicationContext);
        applicationContext.setClassLoader(pluginClassLoader);

        applicationContext.getBeanFactory().registerSingleton(BEAN_PLUGIN, plugin);
        applicationContext.getBeanFactory().autowireBean(plugin);

        if (!CollectionUtils.isEmpty(sharedBeanNames)) {
            for (String beanName : sharedBeanNames) {
                registerBeanFromMainContext(applicationContext, beanName);
            }
        }

        return applicationContext;
    }
 

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;
}
 

@Override
protected ApplicationContext createApplicationContext() {
    AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
    applicationContext.setClassLoader(getWrapper().getPluginClassLoader());
    applicationContext.register(ApplicationConfiguration.class);
    applicationContext.refresh();
    return applicationContext;
}
 

@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);
    }
}
 

@Override
protected ApplicationContext createApplicationContext() {
    AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
    applicationContext.setClassLoader(getWrapper().getPluginClassLoader());
    applicationContext.register(SpringConfiguration.class);
    applicationContext.refresh();

    return applicationContext;
}