import org.apache.commons.configuration.EnvironmentConfiguration; //导入依赖的package包/类
public static ConcurrentCompositeConfiguration createLocalConfig(List<ConfigModel> configModelList) {
  ConcurrentCompositeConfiguration config = new ConcurrentCompositeConfiguration();

  duplicateServiceCombConfigToCse(config,
      new ConcurrentMapConfiguration(new SystemConfiguration()),
      "configFromSystem");
  duplicateServiceCombConfigToCse(config,
      convertEnvVariable(new ConcurrentMapConfiguration(new EnvironmentConfiguration())),
      "configFromEnvironment");
  duplicateServiceCombConfigToCse(config,
      new DynamicConfiguration(
          new MicroserviceConfigurationSource(configModelList), new NeverStartPollingScheduler()),
      "configFromYamlFile");

  return config;
}
 

import org.apache.commons.configuration.EnvironmentConfiguration; //导入依赖的package包/类
private Optional<String> getUserConfigFilename() throws NamingException {
    CompositeConfiguration cc = new CompositeConfiguration();
    JNDIConfiguration jndi = new JNDIConfiguration();
    EnvironmentConfiguration env = new EnvironmentConfiguration();
    SystemConfiguration jvm = new SystemConfiguration();
    cc.addConfiguration(jvm);
    cc.addConfiguration(env);
    cc.addConfiguration(jndi);
    //
    final String CONFIG_FILENAME = (String) cc.getProperty("gladosWiki_configFile");
    if (false == Strings.isNullOrEmpty(CONFIG_FILENAME)) {
        LOG.debug(String.format("LOCAL-CONFIG CONFIG_FILENAME = %s", CONFIG_FILENAME));
        return Optional.of(CONFIG_FILENAME);
    } else {
        return Optional.absent();
    }
}
 

import org.apache.commons.configuration.EnvironmentConfiguration; //导入依赖的package包/类
private void append(Map<String, Object> map, Configuration config) {
	if (config instanceof ConfigurableEnvironmentConfiguration) {
		return;
	}
	if (config instanceof SystemConfiguration) {
		return;
	}
	if (config instanceof EnvironmentConfiguration) {
		return;
	}
	for (Iterator<String> iter = config.getKeys(); iter.hasNext();) {
		String key = iter.next();
		map.put(key, config.getProperty(key));
	}
}
 

import org.apache.commons.configuration.EnvironmentConfiguration; //导入依赖的package包/类
/**
 * Returns the configuration data. If configuration data is null, method first attempts to
 * create a configuration data from JVM's system properties.<br>
 * 
 * @return test configuration data
 */
public synchronized Configuration getData() {
    if (data != null) {
        return data;
    }
    final HierarchicalConfiguration cfg = new HierarchicalConfiguration();
    cfg.copy(new EnvironmentConfiguration());// copy the environment variables.
    cfg.copy(new SystemConfiguration());// JVM args
    log.debug("Configuration data from Env:\n" + ConfigurationUtils.toString(cfg));
    return data = prepareData(cfg);
}
 

import org.apache.commons.configuration.EnvironmentConfiguration; //导入依赖的package包/类
protected static void configureArchaius(ConfigurableEnvironmentConfiguration envConfig, ConfigurableEnvironment env, List<AbstractConfiguration> externalConfigurations) {
	if (initialized.compareAndSet(false, true)) {
		String appName = env.getProperty("spring.application.name");
		if (appName == null) {
			appName = "application";
			log.warn("No spring.application.name found, defaulting to 'application'");
		}
		System.setProperty(DeploymentContext.ContextKey.appId.getKey(), appName);

		ConcurrentCompositeConfiguration config = new ConcurrentCompositeConfiguration();

		// support to add other Configurations (Jdbc, DynamoDb, Zookeeper, jclouds,
		// etc...)
		if (externalConfigurations != null) {
			for (AbstractConfiguration externalConfig : externalConfigurations) {
				config.addConfiguration(externalConfig);
			}
		}
		config.addConfiguration(envConfig,
				ConfigurableEnvironmentConfiguration.class.getSimpleName());

		defaultURLConfig = new DynamicURLConfiguration();
		try {
			config.addConfiguration(defaultURLConfig, URL_CONFIG_NAME);
		}
		catch (Throwable ex) {
			log.error("Cannot create config from " + defaultURLConfig, ex);
		}

		// TODO: sys/env above urls?
		if (!Boolean.getBoolean(DISABLE_DEFAULT_SYS_CONFIG)) {
			SystemConfiguration sysConfig = new SystemConfiguration();
			config.addConfiguration(sysConfig, SYS_CONFIG_NAME);
		}
		if (!Boolean.getBoolean(DISABLE_DEFAULT_ENV_CONFIG)) {
			EnvironmentConfiguration environmentConfiguration = new EnvironmentConfiguration();
			config.addConfiguration(environmentConfiguration, ENV_CONFIG_NAME);
		}

		ConcurrentCompositeConfiguration appOverrideConfig = new ConcurrentCompositeConfiguration();
		config.addConfiguration(appOverrideConfig, APPLICATION_PROPERTIES);
		config.setContainerConfigurationIndex(
				config.getIndexOfConfiguration(appOverrideConfig));

		addArchaiusConfiguration(config);
	}
	else {
		// TODO: reinstall ConfigurationManager
		log.warn(
				"Netflix ConfigurationManager has already been installed, unable to re-install");
	}
}