com.uber.m3.tally.ValueBuckets Maven / Gradle / Ivy
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package com.uber.m3.tally;
import com.uber.m3.util.Duration;
/**
* {@link Buckets} implementation backed by {@code Double} values.
*/
public class ValueBuckets extends AbstractBuckets {
public ValueBuckets(Double[] values) {
super(values);
}
public ValueBuckets() {
super();
}
@Override
public Double[] asValues() {
return buckets.toArray(new Double[buckets.size()]);
}
@Override
public Duration[] asDurations() {
Duration[] durations = new Duration[buckets.size()];
for (int i = 0; i < durations.length; i++) {
durations[i] = Duration.ofNanos((long) (buckets.get(i) * Duration.NANOS_PER_SECOND));
}
return durations;
}
/**
* Helper function to create {@link ValueBuckets} of linear spacing.
* @param start the starting bucket's value
* @param width the width of each bucket
* @param numBuckets the number of buckets to create
* @return {@link ValueBuckets} of the specified parameters
*/
public static ValueBuckets linear(double start, double width, int numBuckets) {
if (numBuckets <= 0) {
throw new IllegalArgumentException("Must have a positive number of buckets");
}
if (width <= 0) {
throw new IllegalArgumentException("Bucket width must be positive");
}
Double[] buckets = new Double[numBuckets];
for (int i = 0; i < numBuckets; i++) {
buckets[i] = start + (i * width);
}
return new ValueBuckets(buckets);
}
/**
* Helper function to create {@link ValueBuckets} of exponential spacing.
* @param start the starting bucket's value}
* @param factor the factor between each bucket
* @param numBuckets the number of buckets to create
* @return {@link ValueBuckets} of the specified paramters
*/
public static ValueBuckets exponential(double start, double factor, int numBuckets) {
if (numBuckets <= 0) {
throw new IllegalArgumentException("Must have a positive number of buckets");
}
if (factor <= 1) {
throw new IllegalArgumentException("Factor must be greater than 1");
}
Double[] buckets = new Double[numBuckets];
Double curDuration = start;
for (int i = 0; i < numBuckets; i++) {
buckets[i] = curDuration;
curDuration *= factor;
}
return new ValueBuckets(buckets);
}
}