How to use

entrySet

method

in

io.gravitee.common.http.HttpHeaders

  private void writeHeaders() {
    headers.entrySet().forEach(
        headerEntry -> httpServerResponse.putHeader(headerEntry.getKey(), headerEntry.getValue()));
    headersWritten = true;
  }
}

protected void writeResponse(HttpServletResponse response, Response proxyResponse) {
  response.setStatus(proxyResponse.status());
  HttpHeaders headers = proxyResponse.headers();
  for (Map.Entry<String, List<String>> header : headers.entrySet()) {
    header.getValue().forEach(headerValue -> response.addHeader(header.getKey(), headerValue));
  }
}