Alien4CloudSpringContext.java 文件源码

public static ApplicationContext newApplicationContext(ManagementContext mgmt, ResourceLoader resourceLoader) throws Exception {
    log.info("Loading Alien4Cloud platform...");
    // TODO if ES cannot find a config file, it will hang waiting for peers; should warn if does not complete in 1m
    try {
        Stopwatch s = Stopwatch.createStarted();

        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();

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

        // messy, but seems we must manually load the properties before loading the beans; otherwise we get e.g.
        // Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'directories.alien' in string value "${directories.alien}/plugins"
        final YamlPropertiesFactoryBean yamlPropertiesFactoryBean = AlienBrooklynYamlPropertiesFactoryBeanFactory.get(mgmt, ctx);
        if (yamlPropertiesFactoryBean == null) {
            throw new IllegalStateException("Could not load configuration for A4C. Expected either a value for ConfigKey " +
                    AlienBrooklynYamlPropertiesFactoryBeanFactory.ALIEN_CONFIG_FILE.getName() + " or for a resource named " +
                    AlienYamlPropertiesFactoryBeanFactory.ALIEN_CONFIGURATION_YAML + " to be available.");
        }


        ctx.getEnvironment().getPropertySources().addFirst(new PropertiesPropertySource("user",
                yamlPropertiesFactoryBean.getObject()));
        ctx.getBeanFactory().registerSingleton("brooklynManagementContext", mgmt);

        ctx.register(Alien4CloudSpringContext.class, Alien4CloudSpringConfig.class);
        ctx.refresh();
        ctx.registerShutdownHook();
        log.info("Finished loading Alien4Cloud platform (" + Duration.of(s) + ")");
        return ctx;

    } catch (Throwable t) {
        log.warn("Errors loading Alien4Cloud platform (rethrowing): " + t, t);
        throw Exceptions.propagate(t);
    }
}