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modules/loader/src/main/scala/com/snowplowanalytics/snowplow/rdbloader/dsl/StatsD.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * Copyright (c) 2021-2021 Snowplow Analytics Ltd. All rights reserved. | ||
| * | ||
| * This program is licensed to you under the Apache License Version 2.0, | ||
| * and you may not use this file except in compliance with the Apache License Version 2.0. | ||
| * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0. | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the Apache License Version 2.0 is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under. | ||
| */ | ||
| package com.snowplowanalytics.snowplow.rdbloader.dsl | ||
|
|
||
| import java.time.Duration | ||
| import java.net.{DatagramPacket, DatagramSocket, InetAddress} | ||
| import java.nio.charset.StandardCharsets.UTF_8 | ||
|
|
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| import cats.Monad | ||
| import cats.implicits._ | ||
|
|
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| import cats.effect.{Blocker, ContextShift, Resource, Sync, Timer} | ||
|
|
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| import com.snowplowanalytics.snowplow.rdbloader.common.LoaderMessage | ||
| import com.snowplowanalytics.snowplow.rdbloader.common.config.Config | ||
|
|
||
| trait StatsD[F[_]] { | ||
| def sendMetrics(loaded: LoaderMessage.ShreddingComplete): F[Unit] | ||
| } | ||
|
|
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| object StatsD { | ||
|
|
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| final case class KVMetric(key: String, value: String) | ||
|
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| private val MinLatencyName = "latency.min" | ||
| private val MaxLatencyName = "latency.max" | ||
| private val CountGoodName = "count.good" | ||
|
|
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| def getInstance[F[_]: ContextShift: Monad: Sync: Timer](statsDConfig: Option[Config.StatsD], blocker: Blocker): StatsD[F] = | ||
| statsDConfig match { | ||
| case Some(config) => | ||
| new StatsD[F] { | ||
| def sendMetrics(loaded: LoaderMessage.ShreddingComplete): F[Unit] = | ||
| mkSocket[F](blocker).use { socket => | ||
| for { | ||
| metrics <- getMetrics[F](loaded) | ||
| formatted = metrics.map(statsDFormat(config)) | ||
| ip <- blocker.delay(InetAddress.getByName(config.hostname)) | ||
| _ <- formatted.traverse_(sendMetric[F](blocker, socket, ip, config.port)) | ||
| } yield () | ||
| } | ||
| } | ||
| case None => | ||
| new StatsD[F] { | ||
| def sendMetrics(loaded: LoaderMessage.ShreddingComplete): F[Unit] = Monad[F].unit | ||
| } | ||
| } | ||
| private def mkSocket[F[_]: ContextShift: Sync](blocker: Blocker): Resource[F, DatagramSocket] = | ||
| Resource.fromAutoCloseableBlocking(blocker)(Sync[F].delay(new DatagramSocket)) | ||
|
|
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| private def getMetrics[F[_]: Monad: Timer](loaded: LoaderMessage.ShreddingComplete): F[List[KVMetric]] = | ||
| Timer[F].clock.instantNow.map { now => | ||
| List( | ||
| loaded.timestamps.min.map(min => Duration.between(min, now).toSeconds()).map(l => KVMetric(MaxLatencyName, l.toString)), | ||
| loaded.timestamps.max.map(max => Duration.between(max, now).toSeconds()).map(l => KVMetric(MinLatencyName, l.toString)), | ||
| loaded.count.map(c => KVMetric(CountGoodName, c.toString)) | ||
| ) | ||
| .collect { case Some(m) => m } | ||
| } | ||
|
|
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| private def sendMetric[F[_]: ContextShift: Sync]( | ||
| blocker: Blocker, | ||
| socket: DatagramSocket, | ||
| addr: InetAddress, | ||
| port: Int | ||
| )( | ||
| metric: String | ||
| ): F[Unit] = { | ||
| val bytes = metric.getBytes(UTF_8) | ||
| val packet = new DatagramPacket(bytes, bytes.length, addr, port) | ||
| blocker.delay(socket.send(packet)) | ||
| } | ||
|
|
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| private def statsDFormat(config: Config.StatsD)(metric: KVMetric): String = { | ||
| val tagStr = config.tags.map { case (k, v) => s"$k:$v" }.mkString(",") | ||
| val prefix = config.metricsPrefix | ||
| s"${prefix}${metric.key}:${metric.value}|g|#$tagStr" | ||
| } | ||
| } |
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