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author | Egil Moeller <egil.moller@freecode.no> | 2010-03-22 00:16:53 +0100 |
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committer | Egil Moeller <egil.moller@freecode.no> | 2010-03-22 00:16:53 +0100 |
commit | fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7 (patch) | |
tree | 928419d6bfe794865e4b8f0634bd792f795c4b8a /trunk/infrastructure/net.appjet.oui/stats.scala | |
parent | 0fdab3db005c4fa31fb8306b573c0b35073d3e56 (diff) | |
parent | d56b9b3b82cdebcaeb00eec0fcb4326ad21adaa8 (diff) | |
download | etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.tar.gz etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.tar.xz etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.zip |
Merge branch 'master' into plugin-framework
Diffstat (limited to 'trunk/infrastructure/net.appjet.oui/stats.scala')
-rw-r--r-- | trunk/infrastructure/net.appjet.oui/stats.scala | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/trunk/infrastructure/net.appjet.oui/stats.scala b/trunk/infrastructure/net.appjet.oui/stats.scala deleted file mode 100644 index 075182f..0000000 --- a/trunk/infrastructure/net.appjet.oui/stats.scala +++ /dev/null @@ -1,220 +0,0 @@ -/** - * Copyright 2009 Google Inc. - * - * 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 net.appjet.oui; - -import java.util.Date; - -import scala.collection.mutable.{HashMap, HashSet, Set, Map, ArrayBuffer}; -import scala.util.Sorting; - -trait BucketMap extends scala.collection.mutable.Map[int, BucketedLastHits] { - def t = 1000*60; - override def apply(s: int) = synchronized { getOrElseUpdate(s, new BucketedLastHits(t)) }; - def counts = { val p = this; new scala.collection.Map.Projection[int, int] { - def size = p.size; - def get(s: int) = p.get(s).map(_.count); - def elements = p.elements.map(o => (o._1, o._2.count)); - }}; -} - -abstract class BucketKeeper[A, B](val size: Long, val numbuckets: int, val noUpdate: Boolean) { - def this(size: Long, noUpdate: Boolean) = - this(size, Math.max(100, if (noUpdate) 1 else (size/60000).toInt), noUpdate) - def this(size: Long) = this(size, false); - - val buckets = new Array[A](numbuckets); - - val millisPerBucket = size/numbuckets; - var lastSwitch = System.currentTimeMillis(); - var currentBucket = 0; - - def withSyncUpdate[E](block: E): E = synchronized { - updateBuckets(); - block; - } - - protected def bucketAtTime(d: Date) = { - val msAgo = lastSwitch - d.getTime(); - val bucketsAgo = Math.floor(msAgo/millisPerBucket).asInstanceOf[Int]; - if (bucketsAgo < numbuckets) { - val bucket = (currentBucket - bucketsAgo + numbuckets) % numbuckets - // println("Applying to old bucket: "+bucket+" / current: "+currentBucket+", old count: "+count); - Some(bucket); - } else { - // println("No bucket found for: "+d); - None; - } - } - - protected def updateBuckets(): Unit = { - if (! noUpdate) { - val now = System.currentTimeMillis(); - while (now > lastSwitch + millisPerBucket) { - lastSwitch += millisPerBucket; - currentBucket = (currentBucket + 1) % numbuckets; - bucketClear(currentBucket); - } - } - } - - protected def bucketClear(index: Int); - protected def bucketsInOrder: Seq[A] = - buckets.slice((currentBucket+1)%numbuckets, numbuckets) ++ - buckets.slice(0, currentBucket) - - def mergeBuckets(b: Seq[A]): B; - - def history(bucketsPerSample: Int, numSamples: Int): Array[B] = withSyncUpdate { - val bseq = bucketsInOrder.reverse.take(bucketsPerSample*numSamples); - val sampleCount = Math.min(numSamples, bseq.length); - val samples = - for (i <- 0 until sampleCount) yield { - mergeBuckets(bseq.slice(i*bucketsPerSample, (i+1)*bucketsPerSample)); - } - samples.reverse.toArray; - } - def latest(bucketsPerSample: Int): B = history(bucketsPerSample, 1)(0); - def count: B = withSyncUpdate { mergeBuckets(buckets); } - - for (i <- 0 until numbuckets) { - bucketClear(i); - } -} - -class BucketedUniques(size: Long, noUpdate: Boolean) -extends BucketKeeper[Set[Any], Int](size, noUpdate) { - def this(size: Long) = this(size, false); - - override protected def bucketClear(index: Int): Unit = { - buckets(index) = new HashSet[Any]; - } - - override def mergeBuckets(b: Seq[Set[Any]]) = { - b.foldLeft(scala.collection.immutable.Set[Any]())(_ ++ _).size; - } - - def hit(d: Date, value: Any): Unit = withSyncUpdate { - for (bucket <- bucketAtTime(d)) { - buckets(bucket) += value; - } - } -} - -class BucketedValueCounts(size: Long, noUpdate: Boolean) -extends BucketKeeper[HashMap[String, Int], (Int, Map[String, Int])](size, noUpdate) { - def this(size: Long) = this(size, false); - - override protected def bucketClear(index: Int): Unit = { - buckets(index) = new HashMap[String, Int]; - } - - override def mergeBuckets(b: Seq[HashMap[String, Int]]) = { - val out = new HashMap[String, Int]; - var total = 0; - for (m <- b) { - for ((k, v) <- m) { - out(k) = out.getOrElse(k, 0) + v; - total += v; - } - } - (total, out); - } - - def hit(d: Date, value: String, increment: Int): Unit = withSyncUpdate { - for (bucket <- bucketAtTime(d)) { - buckets(bucket)(value) = - buckets(bucket).getOrElse(value, 0)+increment; - } - } - - def hit(d: Date, value: String): Unit = hit(d, value, 1); -} - - -/** - * Keeps track of how many "hits" in the last size milliseconds. - * Has granularity speicified by numbuckets. - */ -class BucketedLastHits(size: Long, noUpdate: Boolean) -extends BucketKeeper[Int, Int](size, noUpdate) { - def this(size: Long) = this(size, false); - - override protected def bucketClear(index: int): Unit = { - buckets(index) = 0; - } - - override def mergeBuckets(b: Seq[Int]) = { - b.foldRight(0)(_+_); - } - - def hit(d: Date): Unit = hit(d, 1); - def hit(d: Date, n: Int): Unit = withSyncUpdate { - for (bucket <- bucketAtTime(d)) { - buckets(bucket) = buckets(bucket) + n; - } - } -} - -class BucketedLastHitsHistogram(size: Long, noUpdate: Boolean) -extends BucketKeeper[ArrayBuffer[Int], Function1[Float, Int]](size, noUpdate) { - def this(size: Long) = this(size, false); - - override protected def bucketClear(index: Int): Unit = { - buckets(index) = new ArrayBuffer[Int]; - } - - // elements will end up sorted. - protected def histogramFunction(elements: Array[Int]): Function1[Float, Int] = { - Sorting.quickSort(elements); - (percentile: Float) => { - if (elements.length == 0) { - 0 - } else { - elements( - Math.round(percentile/100.0f*(elements.length-1))); - } - } - } - - override def mergeBuckets(b: Seq[ArrayBuffer[Int]]) = { - val elements = new Array[Int](b.foldRight(0)(_.size + _)); - var currentIndex = 0; - for (bucket <- b if bucket.length > 0) { - // copyToArray is broken through scala 2.7.5, fixed in trunk. - // bucket.copyToArray(allElements, currentIndex); - val bucketArray = bucket.toArray; - System.arraycopy(bucketArray, 0, elements, currentIndex, bucketArray.length); - currentIndex += bucket.size - } - histogramFunction(elements); - } - - def hit(d: Date): Unit = hit(d, 1); - def hit(d: Date, n: Int): Unit = withSyncUpdate { - for (bucket <- bucketAtTime(d)) { - buckets(bucket) += n; - } - } -} - -object appstats { - val minutelyStatus = new HashMap[int, BucketedLastHits] with BucketMap; - val hourlyStatus = new HashMap[int, BucketedLastHits] with BucketMap { override val t = 1000*60*60 }; - val dailyStatus = new HashMap[int, BucketedLastHits] with BucketMap { override val t = 1000*60*60*24 }; - val weeklyStatus = new HashMap[int, BucketedLastHits] with BucketMap { override val t = 1000*60*60*24*7 }; - val stati = Array(minutelyStatus, hourlyStatus, dailyStatus, weeklyStatus); -} |