customizePropertySources method

void customizePropertySources(MutablePropertySources sources)

Adds the sources a new environment starts with: the environment variables. Override it in a subclass that should always start with more sources.

It runs inside the constructor, before the subclass's own fields are initialized, so it must not use them.

class AppEnvironment extends StandardEnvironment {
  @override
  void customizePropertySources(MutablePropertySources sources) {
    sources.addLast(MapPropertySource('defaults', {'port': '8080'}));
    super.customizePropertySources(sources);
  }
}

Implementation

void customizePropertySources(MutablePropertySources sources) {
  sources.addLast(
    SystemEnvironmentPropertySource(
      SystemEnvironmentPropertySource.defaultName,
      systemEnvironment,
    ),
  );
}