turboFei commented on code in PR #6863:
URL: https://github.com/apache/kyuubi/pull/6863#discussion_r1897132509
##########
kyuubi-metrics/src/main/scala/org/apache/kyuubi/metrics/PrometheusReporterService.scala:
##########
@@ -100,4 +100,90 @@ class PrometheusReporterService(registry: MetricRegistry)
}
}
}
+
+ private def createPrometheusServlet(): HttpServlet = {
+ new HttpServlet {
+ override def doGet(request: HttpServletRequest, response:
HttpServletResponse): Unit = {
+ try {
+ response.setContentType("text/plain;charset=utf-8")
+ response.setStatus(HttpServletResponse.SC_OK)
+ response.getWriter.print(getMetricsSnapshot())
+ } catch {
+ case e: IllegalArgumentException =>
+ response.sendError(HttpServletResponse.SC_BAD_REQUEST,
e.getMessage)
+ case e: Exception =>
+ warn(s"GET ${request.getRequestURI} failed: $e", e)
+ throw e
+ }
+ }
+ // ensure TRACE is not supported
+ override protected def doTrace(req: HttpServletRequest, res:
HttpServletResponse): Unit = {
+ res.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED)
+ }
+ }
+ }
+
+ private def getMetricsSnapshot(): String = {
+ import scala.collection.JavaConverters._
+
+ val gaugesLabel = s"""{type="gauges",$instanceLabel}"""
+ val countersLabel = s"""{type="counters",$instanceLabel}"""
+ val metersLabel = countersLabel
+ val histogramslabels = s"""{type="histograms",$instanceLabel}"""
+ val timersLabels = s"""{type="timers",$instanceLabel}"""
+
+ val sb = new StringBuilder()
+ registry.getGauges.asScala.foreach { case (k, v) =>
+ if (!v.getValue.isInstanceOf[String]) {
+ sb.append(s"${normalizeKey(k)}$gaugesLabel ${v.getValue}\n")
+ }
+ }
+ registry.getCounters.asScala.foreach { case (k, v) =>
+ sb.append(s"${normalizeKey(k)}$countersLabel ${v.getCount}\n")
Review Comment:
Gauge and counter example
```
# HELP kyuubi_connection_opened_b_citrst Generated from Dropwizard metric
import (metric=kyuubi.connection.opened.b_citrst,
type=com.codahale.metrics.Counter)
# TYPE kyuubi_connection_opened_b_citrst gauge
kyuubi_connection_opened_b_citrst 0.0
```
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