public HttpResponse send()

in spectator-ext-sandbox/src/main/java/com/netflix/spectator/sandbox/HttpRequestBuilder.java [209:250]
32 lines of code
9 McCabe index (conditional complexity)

  public HttpResponse send() throws IOException {
    HttpResponse response = null;
    for (int attempt = 1; attempt <= numAttempts; ++attempt) {
      entry.withAttempt(attempt);
      try {
        response = sendImpl();
        int s = response.status();
        if (s == 429 || s == 503) {
          // Request is getting throttled, exponentially back off
          // - 429 client sending too many requests
          // - 503 server unavailable
          try {
            long delay = initialRetryDelay << (attempt - 1);
            LOGGER.debug("request throttled, delaying for {}ms: {} {}", delay, method, uri);
            Thread.sleep(delay);
          } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            throw new IOException("request failed " + method + " " + uri, e);
          }
        } else if (s < 500) {
          // 4xx errors other than 429 are not considered retriable, so for anything
          // less than 500 just return the response to the user
          return response;
        }
      } catch (IOException e) {
        // All exceptions are considered retriable. Some like UnknownHostException are
        // debatable, but we have seen them in some cases if there is a high latency for
        // DNS lookups. So for now assume all exceptions are transient issues.
        if (attempt == numAttempts) {
          throw e;
        } else {
          LOGGER.warn("attempt {} of {} failed: {} {}", attempt, numAttempts, method, uri);
        }
      }
    }

    if (response == null) {
      // Should not get here
      throw new IOException("request failed " + method + " " + uri);
    }
    return response;
  }