1 files changed, 0 insertions, 120 deletions
diff --git a/kamon-core/src/legacy-main/scala/kamon/metric/instrument/Gauge.scala b/kamon-core/src/legacy-main/scala/kamon/metric/instrument/Gauge.scala
deleted file mode 100644
index 39571d3d..00000000
--- a/kamon-core/src/legacy-main/scala/kamon/metric/instrument/Gauge.scala
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * =========================================================================================
- * 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.instrument
-
-import java.util.concurrent.atomic.{AtomicLong, AtomicLongFieldUpdater, AtomicReference}
-
-import akka.actor.Cancellable
-import kamon.metric.instrument.Gauge.CurrentValueCollector
-import kamon.metric.instrument.Histogram.DynamicRange
-
-import scala.concurrent.duration.FiniteDuration
-
-trait Gauge extends Instrument {
-  type SnapshotType = Histogram.Snapshot
-
-  def record(value: Long): Unit
-  def record(value: Long, count: Long): Unit
-  def refreshValue(): Unit
-}
-
-object Gauge {
-
-  def apply(dynamicRange: DynamicRange, refreshInterval: FiniteDuration, scheduler: RefreshScheduler, valueCollector: CurrentValueCollector): Gauge = {
-    val underlyingHistogram = Histogram(dynamicRange)
-    val gauge = new HistogramBackedGauge(underlyingHistogram, valueCollector)
-    val refreshValuesSchedule = scheduler.schedule(refreshInterval, () ⇒ {
-      gauge.refreshValue()
-    })
-
-    gauge.automaticValueCollectorSchedule.set(refreshValuesSchedule)
-    gauge
-  }
-
-  def create(dynamicRange: DynamicRange, refreshInterval: FiniteDuration, scheduler: RefreshScheduler, valueCollector: CurrentValueCollector): Gauge =
-    apply(dynamicRange, refreshInterval, scheduler, valueCollector)
-
-  trait CurrentValueCollector {
-    def currentValue: Long
-  }
-
-  implicit def functionZeroAsCurrentValueCollector(f: () ⇒ Long): CurrentValueCollector = new CurrentValueCollector {
-    def currentValue: Long = f.apply()
-  }
-
-  implicit def callByNameLongAsCurrentValueCollector(f: ⇒ Long): CurrentValueCollector = new CurrentValueCollector {
-    def currentValue: Long = f
-  }
-}
-
-/**
- *  Helper for cases in which a gauge shouldn't store the current value of a observed value but the difference between
- *  the current observed value and the previously observed value. Should only be used if the observed value is always
- *  increasing or staying steady, but is never able to decrease.
- *
- *  Note: The first time a value is collected, this wrapper will always return zero, afterwards, the difference between
- *        the current value and the last value will be returned.
- */
-class DifferentialValueCollector(wrappedValueCollector: CurrentValueCollector) extends CurrentValueCollector {
-  @volatile private var _readAtLeastOnce = false
-  private val _lastObservedValue = new AtomicLong(0)
-
-  def currentValue: Long = {
-    if (_readAtLeastOnce) {
-      val wrappedCurrent = wrappedValueCollector.currentValue
-      val diff = wrappedCurrent - _lastObservedValue.getAndSet(wrappedCurrent)
-
-      if (diff >= 0) diff else 0L
-
-    } else {
-      _lastObservedValue.set(wrappedValueCollector.currentValue)
-      _readAtLeastOnce = true
-      0L
-    }
-
-  }
-}
-
-object DifferentialValueCollector {
-  def apply(wrappedValueCollector: CurrentValueCollector): CurrentValueCollector =
-    new DifferentialValueCollector(wrappedValueCollector)
-
-  def apply(wrappedValueCollector: ⇒ Long): CurrentValueCollector =
-    new DifferentialValueCollector(new CurrentValueCollector {
-      def currentValue: Long = wrappedValueCollector
-    })
-}
-
-class HistogramBackedGauge(underlyingHistogram: Histogram, currentValueCollector: Gauge.CurrentValueCollector) extends Gauge {
-  private[kamon] val automaticValueCollectorSchedule = new AtomicReference[Cancellable]()
-
-  def record(value: Long): Unit = underlyingHistogram.record(value)
-
-  def record(value: Long, count: Long): Unit = underlyingHistogram.record(value, count)
-
-  def collect(context: CollectionContext): Histogram.Snapshot = underlyingHistogram.collect(context)
-
-  def cleanup: Unit = {
-    if (automaticValueCollectorSchedule.get() != null)
-      automaticValueCollectorSchedule.get().cancel()
-  }
-
-  def refreshValue(): Unit =
-    underlyingHistogram.record(currentValueCollector.currentValue)
-
-}
-