public abstract class ApplicationPropertiesConfigSource extends PropertiesConfigSource {
    private static final long serialVersionUID = -4694780118527396798L;
    static final String APPLICATION_PROPERTIES = "application.properties";
    static final String MP_PROPERTIES = "META-INF/microprofile-config.properties";
    ApplicationPropertiesConfigSource(InputStream is, int ordinal) {
        super(readProperties(is), APPLICATION_PROPERTIES, ordinal);
    }
    ApplicationPropertiesConfigSource(InputStream is, String nm, int ordinal) {
        super(readProperties(is), nm, ordinal);
    }
    private static Map readProperties(final InputStream is) {
        if (is == null) {
            return Collections.emptyMap();
        }
        try (Closeable ignored = is) {
            try (InputStreamReader isr = new InputStreamReader(is, StandardCharsets.UTF_8)) {
                try (BufferedReader br = new BufferedReader(isr)) {
                    final Properties properties = new Properties();
                    properties.load(br);
                    return (Map) (Map) properties;
                }
            }
        } catch (IOException e) {
            throw new IOError(e);
        }
    }
}

/**
 * @author kl : http://kailing.pub
 * @version 1.0
 * @date 2020/7/8 11:15
 */
public class ApolloConfigSource implements ConfigSource {
    private final static String CONFIG_SOURCE_NAME = "Apollo";
    private final Config config = ConfigService.getAppConfig();
    @Override
    public SetgetPropertyNames() {
        return config.getPropertyNames();
    }
    @Override
    public int getOrdinal() {
        return 600;
    }
    @Override
    public Map getProperties() {
        Map properties = new HashMap<>(6);
        for (String key : getPropertyNames()) {
            properties.put(key, config.getProperty(key, null));
        }
        return properties;
    }
    @Override
    public String getValue(String propertyName) {
        return config.getProperty(propertyName, null);
    }
    @Override
    public String getName() {
        return CONFIG_SOURCE_NAME;
    }
}