According to https://about.codecov.io/security-update/

**WARNING**, since Apr 21, 2021, **Grafana** project has been relicensed to **AGPL-v3**, no as Apache 2.0 anymore. Check the LICENSE details.
The following Prometheus + Grafana solution is optional, not a recommendation.

1.take 'getUrl' out of inner loop for better performance
2.use try-with-resources auto close CloseableHttpClient