| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license |
| * agreements. See the NOTICE file distributed with this work for additional information regarding |
| * copyright ownership. The ASF licenses this file to You 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.apache.geode.internal; |
| |
| import org.apache.geode.StatisticDescriptor; |
| import org.apache.geode.Statistics; |
| import org.apache.geode.StatisticsFactory; |
| import org.apache.geode.StatisticsType; |
| |
| |
| |
| public class HistogramStats { |
| /** stat type description */ |
| private static final String hist_typeDesc = "A bucketed histogram of values with unit "; |
| |
| private final int statCounterIndex[]; |
| |
| private final long bp[]; |
| |
| private final Statistics stats; |
| |
| /** |
| * Create a set of statistics to capture a histogram of values with the given break points. |
| * |
| * @param name a unique name for the histogram type |
| * @param unit the unit of data collected |
| * @param breakPoints the breakpoints for each bucket |
| */ |
| public HistogramStats(String name, String unit, StatisticsFactory factory, long[] breakPoints, |
| boolean largerIsBetter) { |
| this.bp = breakPoints; |
| StatisticDescriptor[] fieldDescriptors = new StatisticDescriptor[this.bp.length * 2]; |
| int k = 0; |
| for (int bucketNumber = 0; bucketNumber < this.bp.length; bucketNumber++) { |
| String desc = |
| (bucketNumber < this.bp.length - 1 ? "ForLTE" : "ForGT") + this.bp[bucketNumber]; |
| fieldDescriptors[k] = factory.createIntCounter("BucketCount" + desc, |
| "Number of data points in Bucket " + bucketNumber, "count", !largerIsBetter); |
| k++; |
| fieldDescriptors[k] = factory.createLongCounter("BucketTotal" + desc, |
| "Sum of Bucket " + bucketNumber, unit, !largerIsBetter); |
| k++; |
| } |
| StatisticsType hist_type = factory.createType("HistogramWith" + breakPoints.length + "Buckets", |
| hist_typeDesc + unit + " for " + breakPoints.length + " breakpoints", fieldDescriptors); |
| this.statCounterIndex = new int[this.bp.length * 2]; |
| k = 0; |
| for (int bucketNumber = 0; bucketNumber < this.bp.length; bucketNumber++) { |
| String desc = |
| (bucketNumber < this.bp.length - 1 ? "ForLTE" : "ForGT") + this.bp[bucketNumber]; |
| this.statCounterIndex[k] = hist_type.nameToId("BucketCount" + desc); |
| k++; |
| this.statCounterIndex[k] = hist_type.nameToId("BucketTotal" + desc); |
| k++; |
| } |
| this.stats = factory.createAtomicStatistics(hist_type, name, 0L); |
| } |
| |
| public void endOp(long delta) { |
| int index = this.statCounterIndex.length - 2; |
| for (int i = 0; i < this.bp.length; i++) { |
| if (delta <= this.bp[i]) { |
| index = i * 2; |
| break; |
| } |
| } |
| this.stats.incInt(this.statCounterIndex[index], 1); |
| this.stats.incLong(this.statCounterIndex[index + 1], delta); |
| } |
| } |