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/*
* =========================================================================================
* Copyright © 2013-2015 the kamon project <http://kamon.io/>
*
* 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 kamon.trace
import kamon.util.ConfigTools.Syntax
import com.typesafe.config.Config
import kamon.util.NanoInterval
case class TraceSettings(levelOfDetail: LevelOfDetail, sampler: Sampler, tokenGenerator: () ⇒ String)
object TraceSettings {
def apply(config: Config): TraceSettings = {
val tracerConfig = config.getConfig("kamon.trace")
val detailLevel: LevelOfDetail = tracerConfig.getString("level-of-detail") match {
case "metrics-only" ⇒ LevelOfDetail.MetricsOnly
case "simple-trace" ⇒ LevelOfDetail.SimpleTrace
case other ⇒ sys.error(s"Unknown tracer level of detail [$other] present in the configuration file.")
}
val sampler: Sampler =
if (detailLevel == LevelOfDetail.MetricsOnly) NoSampling
else tracerConfig.getString("sampling") match {
case "all" ⇒ SampleAll
case "random" ⇒ new RandomSampler(tracerConfig.getInt("random-sampler.chance"))
case "ordered" ⇒ new OrderedSampler(tracerConfig.getInt("ordered-sampler.sample-interval"))
case "threshold" ⇒ new ThresholdSampler(new NanoInterval(tracerConfig.getFiniteDuration("threshold-sampler.minimum-elapsed-time").toNanos))
case "clock" ⇒ new ClockSampler(new NanoInterval(tracerConfig.getFiniteDuration("clock-sampler.pause").toNanos))
}
val dynamic = new akka.actor.ReflectiveDynamicAccess(getClass.getClassLoader)
val tokenGeneratorFQN = tracerConfig.getString("token-generator")
val tokenGenerator = dynamic.createInstanceFor[() ⇒ String](tokenGeneratorFQN, Nil).get // let's bubble up any problems.
TraceSettings(detailLevel, sampler, tokenGenerator)
}
}
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