apollo-demo/src/main/java/com/ctrip/framework/apollo/demo/spring/common/bean/AnnotatedBean.java/AnnotatedBean/setTimeout
class AnnotatedBean:  @Value("${timeout:200}")
  public void setTimeout(int timeout) {
    logger.info("updating timeout, old value: {}, new value: {}", this.timeout, timeout);
    this.timeout = timeout;
  }