PropertySourcesProcessor.java 文件源码

protected void initializePropertySources() {
  if (environment.getPropertySources().contains(APOLLO_PROPERTY_SOURCE_NAME)) {
    //already initialized
    return;
  }
  CompositePropertySource composite = new CompositePropertySource(APOLLO_PROPERTY_SOURCE_NAME);

  //sort by order asc
  ImmutableSortedSet<Integer> orders = ImmutableSortedSet.copyOf(NAMESPACE_NAMES.keySet());
  Iterator<Integer> iterator = orders.iterator();

  while (iterator.hasNext()) {
    int order = iterator.next();
    for (String namespace : NAMESPACE_NAMES.get(order)) {
      Config config = ConfigService.getConfig(namespace);

      composite.addPropertySource(new ConfigPropertySource(namespace, config));
    }
  }
  environment.getPropertySources().addFirst(composite);
}