s-rpc-prometheus-client_2.11.0.15.1.source-code.ClientMetricsForMethod.scala Maven / Gradle / Ivy

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Freestyle RPC is a purely functional library for building RPC endpoint based services with support for RPC and HTTP/2

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/*
 * Copyright 2017-2018 47 Degrees, LLC. 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package freestyle.rpc
package prometheus
package client

import freestyle.rpc.interceptors.GrpcMethodInfo
import io.grpc.Status.Code
import io.prometheus.client.SimpleCollector

case class ClientMetricsForMethod(method: GrpcMethodInfo, clientMetrics: ClientMetrics) {

  import clientMetrics._

  def recordCallStarted(): Unit =
    addLabels(rpcStarted).inc()

  def recordClientHandled(code: Code): Unit =
    addLabels(rpcCompleted, code.toString).inc()

  def recordStreamMessageReceived(): Unit =
    addLabels(streamMessagesReceived).inc()

  def recordStreamMessageSent(): Unit =
    addLabels(streamMessagesSent).inc()

  def recordLatency(latencySec: Double): Unit =
    completedLatencySeconds foreach (_ =>
      addLabels(completedLatencySeconds.get).observe(latencySec))

  private def addLabels[T](collector: SimpleCollector[T], labels: String*): T =
    collector.labels(
      List(method.`type`.toString, method.serviceName, method.methodName) ++ labels.toList: _*)

}