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Diffstat (limited to 'kamon-core/src/main/scala/kamon/metrics/instruments/HdrRecorder.scala')
-rw-r--r-- | kamon-core/src/main/scala/kamon/metrics/instruments/HdrRecorder.scala | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/kamon-core/src/main/scala/kamon/metrics/instruments/HdrRecorder.scala b/kamon-core/src/main/scala/kamon/metrics/instruments/HdrRecorder.scala deleted file mode 100644 index ce4fd76d..00000000 --- a/kamon-core/src/main/scala/kamon/metrics/instruments/HdrRecorder.scala +++ /dev/null @@ -1,78 +0,0 @@ -/* - * ========================================================================================= - * 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 org.HdrHistogram - -import java.util.concurrent.atomic.AtomicLongFieldUpdater -import scala.annotation.tailrec -import kamon.metrics._ - -/** - * This implementation aims to be used for real time data collection where data snapshots are taken often over time. - * The snapshotAndReset() operation extracts all the recorded values from the histogram and resets the counts, but still - * leave it in a consistent state even in the case of concurrent modification while the snapshot is being taken. - */ -class HdrRecorder(highestTrackableValue: Long, significantValueDigits: Int, scale: Scale) - extends AtomicHistogram(1L, highestTrackableValue, significantValueDigits) with MetricRecorder { - - import HdrRecorder.totalCountUpdater - - def record(value: Long): Unit = recordValue(value) - - def collect(): MetricSnapshotLike = { - val entries = Vector.newBuilder[MetricSnapshot.Measurement] - val countsLength = counts.length() - - @tailrec def iterate(index: Int, previousValue: Long, nrOfRecordings: Long, bucketLimit: Long, increment: Long): Long = { - if (index < countsLength) { - val currentValue = previousValue + increment - val countAtValue = counts.getAndSet(index, 0) - - if (countAtValue > 0) - entries += MetricSnapshot.Measurement(currentValue, countAtValue) - - if (currentValue == bucketLimit) - iterate(index + 1, currentValue, nrOfRecordings + countAtValue, (bucketLimit << 1) + 1, increment << 1) - else - iterate(index + 1, currentValue, nrOfRecordings + countAtValue, bucketLimit, increment) - } else { - nrOfRecordings - } - } - - val nrOfRecordings = iterate(0, -1, 0, subBucketMask, 1) - - def tryUpdateTotalCount: Boolean = { - val previousTotalCount = getTotalCount - val newTotalCount = previousTotalCount - nrOfRecordings - - totalCountUpdater.compareAndSet(this, previousTotalCount, newTotalCount) - } - - while (!tryUpdateTotalCount) {} - - MetricSnapshot(InstrumentTypes.Histogram, nrOfRecordings, scale, entries.result()) - } - -} - -object HdrRecorder { - val totalCountUpdater = AtomicLongFieldUpdater.newUpdater(classOf[AtomicHistogram], "totalCount") - - def apply(highestTrackableValue: Long, significantValueDigits: Int, scale: Scale): HdrRecorder = - new HdrRecorder(highestTrackableValue, significantValueDigits, scale) - -} |