public class ConfigLocator implements Extension {
  private Config config;

  public void initConfig(@Observes BeforeBeanDiscovery bbd, BeanManager bm) {
    List<ConfigSource> collectedConfigSources = new ArrayList<>();
    bm.fireEvent(new CollectConfig(collectedConfigSources));
    this.config = ConfigProvider.newConfig()......;


    bm.fireEvent(config);
  }
}


and then use

CDI.current().getBeanManager().getExtension(ConfigLocator.class);