/*
* Copyright 2010 Proofpoint, 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 com.facebook.presto.jdbc.internal.airlift.stats;
import com.facebook.presto.jdbc.internal.airlift.units.Duration;
import org.weakref.jmx.Managed;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
/**
* @deprecated Replaced by {@link TimeStat}
*/
@Deprecated
public class TimedStat
{
private final AtomicLong sum = new AtomicLong(0);
private final AtomicLong count = new AtomicLong(0);
private final ExponentiallyDecayingSample sample = new ExponentiallyDecayingSample(1028, 0.015);
@Managed
public long getCount()
{
return count.get();
}
@Managed
public double getSum()
{
return sum.get();
}
@Managed
public double getMin()
{
List<Long> values = sample.values();
if (!values.isEmpty()) {
return Collections.min(values);
}
return Double.NaN;
}
@Managed
public double getMax()
{
List<Long> values = sample.values();
if (!values.isEmpty()) {
return Collections.max(values);
}
return Double.NaN;
}
@Managed
public double getMean()
{
List<Long> values = sample.values();
if (!values.isEmpty()) {
long sum = 0;
for (long value : values) {
sum += value;
}
return sum * 1.0 / values.size();
}
return Double.NaN;
}
@Managed
public double getPercentile(double percentile)
{
if (percentile < 0 || percentile > 1) {
throw new IllegalArgumentException("percentile must be between 0 and 1");
}
return sample.percentiles(percentile)[0];
}
@Managed(description = "50th Percentile Measurement")
public double getTP50()
{
return sample.percentiles(0.5)[0];
}
@Managed(description = "90th Percentile Measurement")
public double getTP90()
{
return sample.percentiles(0.9)[0];
}
@Managed(description = "99th Percentile Measurement")
public double getTP99()
{
return sample.percentiles(0.99)[0];
}
@Managed(description = "99.9th Percentile Measurement")
public double getTP999()
{
return sample.percentiles(0.999)[0];
}
public void addValue(double value, TimeUnit timeUnit)
{
addValue(new Duration(value, timeUnit));
}
public void addValue(Duration duration)
{
sample.update(duration.toMillis());
sum.addAndGet(duration.toMillis());
count.incrementAndGet();
}
public <T> T time(Callable<T> callable)
throws Exception
{
long start = System.nanoTime();
T result = callable.call();
addValue(Duration.nanosSince(start));
return result;
}
}