/**
  * Transmit the metrics in `$data` over UDP
  * 
  * @param string[]  $data
  * @param float     [$sampleRate=1]
  */
 public function send($data, $sampleRate = 1)
 {
     if ($sampleRate < 1) {
         $data = StatsD::getSampledData($data, $sampleRate);
     }
     if (empty($data)) {
         return;
     }
     try {
         $fp = fsockopen("udp://{$this->host}", 8125);
         if (!$fp) {
             return;
         }
         foreach ($data as $stat => $value) {
             fwrite($fp, "{$stat}:{$value}");
         }
         fclose($fp);
     } catch (Exception $e) {
     }
 }