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/*
* =========================================================================================
* Copyright © 2013 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.metrics
import org.scalatest.{ Matchers, WordSpecLike }
import akka.testkit.TestKit
import akka.actor.ActorSystem
import scala.concurrent.duration._
import kamon.metrics.Subscriptions.TickMetricSnapshot
import kamon.metrics.MetricSnapshot.Measurement
class TickMetricSnapshotBufferSpec extends TestKit(ActorSystem("tick-metric-snapshot-buffer")) with WordSpecLike with Matchers {
"the TickMetricSnapshotBuffer" should {
"merge TickMetricSnapshots received until the flush timeout is reached and fix the from/to fields" in new SnapshotFixtures {
val buffer = system.actorOf(TickMetricSnapshotBuffer.props(3 seconds, testActor))
buffer ! firstEmpty
buffer ! secondEmpty
buffer ! thirdEmpty
within(2 seconds)(expectNoMsg())
val mergedSnapshot = expectMsgType[TickMetricSnapshot]
mergedSnapshot.from should equal(1000)
mergedSnapshot.to should equal(4000)
mergedSnapshot.metrics should be('empty)
}
"merge empty and non-empty snapshots" in new SnapshotFixtures {
val buffer = system.actorOf(TickMetricSnapshotBuffer.props(3 seconds, testActor))
buffer ! firstNonEmpty
buffer ! secondNonEmpty
buffer ! thirdEmpty
within(2 seconds)(expectNoMsg())
val mergedSnapshot = expectMsgType[TickMetricSnapshot]
mergedSnapshot.from should equal(1000)
mergedSnapshot.to should equal(4000)
mergedSnapshot.metrics should not be ('empty)
val testMetricSnapshot = mergedSnapshot.metrics(CustomMetric("test-metric")).metrics(CustomMetric.RecordedValues)
testMetricSnapshot.min should equal(1)
testMetricSnapshot.max should equal(10)
testMetricSnapshot.numberOfMeasurements should equal(35)
testMetricSnapshot.measurements should contain allOf (Measurement(1, 10), Measurement(4, 9), Measurement(10, 16))
}
}
trait SnapshotFixtures {
val firstEmpty = TickMetricSnapshot(1000, 2000, Map.empty)
val secondEmpty = TickMetricSnapshot(2000, 3000, Map.empty)
val thirdEmpty = TickMetricSnapshot(3000, 4000, Map.empty)
val firstNonEmpty = TickMetricSnapshot(1000, 2000,
Map((CustomMetric("test-metric") -> SimpleGroupSnapshot(Map(CustomMetric.RecordedValues -> MetricSnapshot(InstrumentTypes.Histogram, 20, Scale.Unit, Vector(Measurement(1, 10), Measurement(10, 10))))))))
val secondNonEmpty = TickMetricSnapshot(1000, 2000,
Map((CustomMetric("test-metric") -> SimpleGroupSnapshot(Map(CustomMetric.RecordedValues -> MetricSnapshot(InstrumentTypes.Histogram, 15, Scale.Unit, Vector(Measurement(4, 9), Measurement(10, 6))))))))
}
case class SimpleGroupSnapshot(metrics: Map[MetricIdentity, MetricSnapshotLike]) extends MetricGroupSnapshot
}
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