apollo-client/src/main/java/com/ctrip/framework/apollo/internals/LocalFileConfigRepository.java/LocalFileConfigRepository/onRepositoryChange
class LocalFileConfigRepository:  @Override
  public void onRepositoryChange(String namespace, Properties newProperties) {
    if (newProperties.equals(m_fileProperties)) {
      return;
    }
    Properties newFileProperties = propertiesFactory.getPropertiesInstance();
    newFileProperties.putAll(newProperties);
    updateFileProperties(newFileProperties, m_upstream.getSourceType());
    this.fireRepositoryChange(namespace, newProperties);
  }