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/* =========================================================================================
* Copyright © 2013-2017 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.testkit
import kamon.metric.{BaseMetric, _}
import _root_.scala.collection.concurrent.TrieMap
trait MetricInspection {
implicit class MetricSyntax(metric: Metric[_]) {
def valuesForTag(tag: String): Seq[String] = {
val instrumentsField = classOf[BaseMetric[_, _]].getDeclaredField("instruments")
instrumentsField.setAccessible(true)
val instruments = instrumentsField.get(metric).asInstanceOf[TrieMap[Map[String, String], _]]
val instrumentsWithTheTag = instruments.keys.filter(_.keys.exists(_ == tag))
instrumentsWithTheTag.map(t => t(tag)).toSeq
}
def partialRefine(tags: Map[String, String]): Seq[Map[String, String]] = {
val instrumentsField = classOf[BaseMetric[_, _]].getDeclaredField("instruments")
instrumentsField.setAccessible(true)
val instruments = instrumentsField.get(metric).asInstanceOf[TrieMap[Map[String, String], _]]
instruments.keys.filter { metricKey =>
tags.toSeq.forall { case (k, v) =>
metricKey.contains(k) && metricKey(k) == v
}
}.toSeq
}
def partialRefineKeys(tags: Set[String]): Seq[Map[String, String]] = {
val instrumentsField = classOf[BaseMetric[_, _]].getDeclaredField("instruments")
instrumentsField.setAccessible(true)
val instruments = instrumentsField.get(metric).asInstanceOf[TrieMap[Map[String, String], _]]
instruments.keys.filter(key => tags.subsetOf(key.keySet)).toSeq
}
}
implicit class HistogramMetricSyntax(histogram: Histogram) {
def distribution(resetState: Boolean = true): Distribution =
histogram match {
case hm: HistogramMetric => hm.refine(Map.empty[String, String]).distribution(resetState)
case h: AtomicHdrHistogram => h.snapshot(resetState).distribution
case h: HdrHistogram => h.snapshot(resetState).distribution
}
}
implicit class MinMaxCounterMetricSyntax(mmCounter: MinMaxCounter) {
def distribution(resetState: Boolean = true): Distribution =
mmCounter match {
case mmcm: MinMaxCounterMetric => mmcm.refine(Map.empty[String, String]).distribution(resetState)
case mmc: SimpleMinMaxCounter => mmc.snapshot(resetState).distribution
}
}
implicit class CounterMetricSyntax(counter: Counter) {
def value(resetState: Boolean = true): Long =
counter match {
case cm: CounterMetric => cm.refine(Map.empty[String, String]).value(resetState)
case c: LongAdderCounter => c.snapshot(resetState).value
}
}
implicit class GaugeMetricSyntax(gauge: Gauge) {
def value(resetState: Boolean = true): Long =
gauge match {
case gm: GaugeMetric => gm.refine(Map.empty[String, String]).value(resetState)
case g: AtomicLongGauge => g.snapshot().value
}
}
}
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