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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.profiler;
import static java.util.stream.Collectors.joining;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Range;
import java.text.DecimalFormat;
/**
* Metric data for {@code description} object. Contains count, average, standard deviation, max and
* histogram.
*/
public final class MetricData {
private final Object description;
private final ImmutableList<HistogramElement> histogram;
private final int count;
private final double avg;
private final double stdDev;
private final int max;
public MetricData(Object description, ImmutableList<HistogramElement> histogram, int count,
double avg, double stdDev, int max) {
this.description = description;
this.histogram = histogram;
this.count = count;
this.avg = avg;
this.stdDev = stdDev;
this.max = max;
}
public Object getDescription() {
return description;
}
public ImmutableList<HistogramElement> getHistogram() {
return histogram;
}
public int getCount() {
return count;
}
public double getAvg() {
return avg;
}
public double getStdDev() {
return stdDev;
}
public int getMax() {
return max;
}
@Override
public String toString() {
if (count == 0) {
return "'" + description + "'. Zero data recorded";
}
DecimalFormat fmt = new DecimalFormat("0.###");
return "'"
+ description
+ "'. "
+ " Count: "
+ count
+ " Avg: "
+ fmt.format(avg)
+ " StdDev: "
+ fmt.format(stdDev)
+ " Max: "
+ max
+ " Histogram:\n "
+ histogram
.stream()
.filter(element -> element.count > 0)
.map(Object::toString)
.collect(joining("\n "));
}
/** An histogram element that contains the range that applies to and the number of elements. */
public static final class HistogramElement {
private final Range<Integer> range;
private final int count;
HistogramElement(Range<Integer> range, int count) {
this.range = range;
this.count = count;
}
public Range<Integer> getRange() {
return range;
}
public int getCount() {
return count;
}
@Override
public String toString() {
return String.format("%-15s:%10s",
"[" + range.lowerEndpoint() + ".." + (range.hasUpperBound()
? range.upperEndpoint()
: "\u221e") // infinite symbol
+ " ms]", count);
}
}
}
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