apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/component/ConfigReleaseWebhookNotifier.java/ConfigReleaseWebhookNotifier/notify
class ConfigReleaseWebhookNotifier:  public void notify(String[] webHookUrls, Env env, ReleaseHistoryBO releaseHistory) {
    if (webHookUrls == null) {
      return;
    }

    for (String webHookUrl : webHookUrls) {
      HttpHeaders headers = new HttpHeaders();
      headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
      HttpEntity entity = new HttpEntity(releaseHistory, headers);
      String url = webHookUrl + "?env={env}";
      try {
        restTemplate.postForObject(url, entity, String.class, env);
      } catch (Exception e) {
        logger.error("Notify webHook server failed, env: {}, webHook server url:{}", env, url, e);
      }
    }
  }