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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.metric
import kamon.Kamon
import kamon.metric.SubscriptionsDispatcher.TickMetricSnapshot
import kamon.metric.instrument.{ InstrumentFactory, Memory, Time, UnitOfMeasurement }
import kamon.testkit.BaseKamonSpec
import kamon.util.MilliTimestamp
import org.scalatest.OptionValues._
class MetricScaleDecoratorSpec extends BaseKamonSpec("metrics-scale-decorator-spec") with SnapshotFixtures {
"the MetricScaleDecorator" when {
"receives a snapshot" which {
val scaleDecorator = system.actorOf(MetricScaleDecorator.props(
Some(Time.Milliseconds), Some(Memory.KiloBytes), testActor))
"is empty" should {
"do nothing for empty snapshots" in {
scaleDecorator ! emptySnapshot
expectMsg(emptySnapshot)
}
}
"is non empty" should {
scaleDecorator ! nonEmptySnapshot
val scaled = expectMsgType[TickMetricSnapshot]
val snapshot = scaled.metrics(testEntity)
"scale time metrics" in {
snapshot.histogram("nano-time").value.max should be(10L +- 1L)
snapshot.counter("micro-time").value.count should be(1000L)
}
"scale memory metrics" in {
snapshot.histogram("byte-memory").value.max should be(1)
snapshot.counter("kbyte-memory").value.count should be(100L)
}
"do nothing with unknown metrics" in {
snapshot.histogram("unknown-histogram").value.max should be(1000L)
snapshot.counter("unknown-counter").value.count should be(10L)
}
"not change from and to" in {
scaled.from.millis should be(1000)
scaled.to.millis should be(2000)
}
}
}
}
}
trait SnapshotFixtures {
self: BaseKamonSpec ⇒
class ScaleDecoratorTestMetrics(instrumentFactory: InstrumentFactory)
extends GenericEntityRecorder(instrumentFactory) {
val nanoTime = histogram("nano-time", Time.Nanoseconds)
val microTime = counter("micro-time", Time.Microseconds)
val byteMemory = histogram("byte-memory", Memory.Bytes)
val kbyteMemory = counter("kbyte-memory", Memory.KiloBytes)
val unknownHistogram = histogram("unknown-histogram", UnitOfMeasurement.Unknown)
val unknownCounter = counter("unknown-counter", UnitOfMeasurement.Unknown)
}
object ScaleDecoratorTestMetrics extends EntityRecorderFactory[ScaleDecoratorTestMetrics] {
override def category: String = "decorator-spec"
override def createRecorder(instrumentFactory: InstrumentFactory): ScaleDecoratorTestMetrics =
new ScaleDecoratorTestMetrics(instrumentFactory)
}
val testEntity = Entity("metrics-scale-decorator-spec", "decorator-spec")
val recorder = Kamon.metrics.entity(ScaleDecoratorTestMetrics, "metrics-scale-decorator-spec")
val emptySnapshot = TickMetricSnapshot(new MilliTimestamp(1000), new MilliTimestamp(2000), Map.empty)
recorder.unknownCounter.increment(10)
recorder.unknownHistogram.record(1000L)
recorder.nanoTime.record(10000000L)
recorder.microTime.increment(1000000L)
recorder.byteMemory.record(1024L)
recorder.kbyteMemory.increment(100L)
val nonEmptySnapshot = TickMetricSnapshot(new MilliTimestamp(1000), new MilliTimestamp(2000), Map(
(testEntity -> recorder.collect(collectionContext))))
}
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