chore: add more gravsearch metrics (#2666)

webapi/src/main/scala/org/knora/webapi/routing/v2/SearchRouteV2.scala

@@ -11,6 +11,8 @@ import akka.http.scaladsl.server.Route
 import zio._
 import zio.metrics._
 
+import java.time.temporal.ChronoUnit
+
 import dsp.errors.BadRequestException
 import org.knora.webapi._
 import org.knora.webapi.config.AppConfig
@@ -238,27 +240,28 @@ final case class SearchRouteV2(searchValueMinLength: Int)(
     post(entity(as[String])(query => requestContext => gravsearch(query, requestContext)))
   }
 
+  private val gravsearchDuration = Metric.timer("gravsearch", ChronoUnit.MILLIS, Chunk.iterate(1.0, 17)(_ * 2))
+  private val gravsearchDurationSummary =
+    Metric.summary("gravsearch_summary", 1.day, 100, 0.03d, Chunk(0.01, 0.1, 0.2, 0.5, 0.8, 0.9, 0.99))
+  private val gravsearchFailCounter    = Metric.counter("gravsearch_fail").fromConst(1)
+  private val gravsearchTimeoutCounter = Metric.counter("gravsearch_timeout").fromConst(1)
+
   private def gravsearch(query: String, requestContext: RequestContext) = {
-    val start = java.lang.System.currentTimeMillis().toDouble
-    val durationMetric =
-      Metric.histogram("gravsearch", MetricKeyType.Histogram.Boundaries.fromChunk(Chunk(0, 10, 100, 1000, 5000, 20000)))
-    val failConter        = Metric.counter("gravsearch_fail").fromConst(1)
-    val timeoutConter     = Metric.counter("gravsearch_timeout").fromConst(1)
     val constructQuery    = GravsearchParser.parseQuery(query)
     val targetSchemaTask  = RouteUtilV2.getOntologySchema(requestContext)
     val schemaOptionsTask = RouteUtilV2.getSchemaOptions(requestContext)
-    val request = for {
+    val task = for {
+      start          <- Clock.instant.map(_.toEpochMilli).map(_.toDouble)
       targetSchema   <- targetSchemaTask
       requestingUser <- Authenticator.getUserADM(requestContext)
       schemaOptions  <- schemaOptionsTask
-    } yield GravsearchRequestV2(constructQuery, targetSchema, schemaOptions, requestingUser)
-    val task = request
-      .flatMap(request => MessageRelay.ask[KnoraResponseV2](request))
-      .tapError {
-        case _: TriplestoreTimeoutException => ZIO.unit @@ timeoutConter
-        case _                              => ZIO.unit @@ failConter
-      }
-      .tap(_ => Clock.instant.map(_.toEpochMilli).map(_.-(start)).debug @@ durationMetric)
+      request         = GravsearchRequestV2(constructQuery, targetSchema, schemaOptions, requestingUser)
+      response <- MessageRelay.ask[KnoraResponseV2](request).tapError {
+                    case _: TriplestoreTimeoutException => ZIO.unit @@ gravsearchTimeoutCounter
+                    case _                              => ZIO.unit @@ gravsearchFailCounter
+                  } @@ gravsearchDuration.trackDuration
+      _ <- Clock.instant.map(_.toEpochMilli).map(_.-(start)) @@ gravsearchDurationSummary
+    } yield response
     RouteUtilV2.completeResponse(task, requestContext, targetSchemaTask, schemaOptionsTask.map(Some(_)))
   }