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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.metric
import com.typesafe.config.ConfigFactory
import kamon.Kamon
import kamon.metric.instrument.Histogram.MutableRecord
import kamon.testkit.BaseKamonSpec
import kamon.util.MilliTimestamp
import akka.testkit.ImplicitSender
import scala.concurrent.duration._
import kamon.metric.SubscriptionsDispatcher.TickMetricSnapshot
class TickMetricSnapshotBufferSpec extends BaseKamonSpec("trace-metrics-spec") with ImplicitSender {
"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.millis should equal(1000)
mergedSnapshot.to.millis 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.millis should equal(1000)
mergedSnapshot.to.millis should equal(4000)
mergedSnapshot.metrics should not be ('empty)
val testMetricSnapshot = mergedSnapshot.metrics(testTraceIdentity).histogram("elapsed-time").get
testMetricSnapshot.min should equal(10)
testMetricSnapshot.max should equal(300)
testMetricSnapshot.numberOfMeasurements should equal(6)
testMetricSnapshot.recordsIterator.toStream should contain allOf (
MutableRecord(10, 3),
MutableRecord(20, 1),
MutableRecord(30, 1),
MutableRecord(300, 1))
}
}
trait SnapshotFixtures {
val collectionContext = Kamon.metrics.buildDefaultCollectionContext
val testTraceIdentity = Entity("buffer-spec-test-trace", "trace")
val traceRecorder = Kamon.metrics.entity(TraceMetrics, "buffer-spec-test-trace")
val firstEmpty = TickMetricSnapshot(new MilliTimestamp(1000), new MilliTimestamp(2000), Map.empty)
val secondEmpty = TickMetricSnapshot(new MilliTimestamp(2000), new MilliTimestamp(3000), Map.empty)
val thirdEmpty = TickMetricSnapshot(new MilliTimestamp(3000), new MilliTimestamp(4000), Map.empty)
traceRecorder.elapsedTime.record(10L)
traceRecorder.elapsedTime.record(20L)
traceRecorder.elapsedTime.record(30L)
val firstNonEmpty = TickMetricSnapshot(new MilliTimestamp(1000), new MilliTimestamp(2000), Map(
(testTraceIdentity -> traceRecorder.collect(collectionContext))))
traceRecorder.elapsedTime.record(10L)
traceRecorder.elapsedTime.record(10L)
traceRecorder.elapsedTime.record(300L)
val secondNonEmpty = TickMetricSnapshot(new MilliTimestamp(1000), new MilliTimestamp(2000), Map(
(testTraceIdentity -> traceRecorder.collect(collectionContext))))
}
}
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