io.micrometer.core.instrument.composite.CompositeLongTaskTimer Maven / Gradle / Ivy
/*
* Copyright 2017 VMware, 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
*
* https://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 io.micrometer.core.instrument.composite;
import io.micrometer.core.instrument.LongTaskTimer;
import io.micrometer.core.instrument.Meter;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.distribution.DistributionStatisticConfig;
import io.micrometer.core.instrument.distribution.HistogramSnapshot;
import io.micrometer.core.instrument.noop.NoopLongTaskTimer;
import java.time.Duration;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
class CompositeLongTaskTimer extends AbstractCompositeMeter implements LongTaskTimer {
private final DistributionStatisticConfig distributionStatisticConfig;
CompositeLongTaskTimer(Meter.Id id, DistributionStatisticConfig distributionStatisticConfig) {
super(id);
this.distributionStatisticConfig = distributionStatisticConfig;
}
@Override
public Sample start() {
List samples = new ArrayList<>();
for (LongTaskTimer ltt : getChildren()) {
samples.add(ltt.start());
}
return new CompositeSample(samples);
}
@Override
public double duration(TimeUnit unit) {
return firstChild().duration(unit);
}
@Override
public int activeTasks() {
return firstChild().activeTasks();
}
@Override
public double max(TimeUnit unit) {
return firstChild().max(unit);
}
@Override
public TimeUnit baseTimeUnit() {
return TimeUnit.SECONDS;
}
@Override
public HistogramSnapshot takeSnapshot() {
return firstChild().takeSnapshot();
}
@Override
LongTaskTimer newNoopMeter() {
return new NoopLongTaskTimer(getId());
}
@SuppressWarnings("ConstantConditions")
@Override
LongTaskTimer registerNewMeter(MeterRegistry registry) {
LongTaskTimer.Builder builder = LongTaskTimer.builder(getId().getName())
.tags(getId().getTagsAsIterable())
.description(getId().getDescription())
.maximumExpectedValue(
Duration.ofNanos(distributionStatisticConfig.getMaximumExpectedValueAsDouble().longValue()))
.minimumExpectedValue(
Duration.ofNanos(distributionStatisticConfig.getMinimumExpectedValueAsDouble().longValue()))
.publishPercentiles(distributionStatisticConfig.getPercentiles())
.publishPercentileHistogram(distributionStatisticConfig.isPercentileHistogram())
.distributionStatisticBufferLength(distributionStatisticConfig.getBufferLength())
.distributionStatisticExpiry(distributionStatisticConfig.getExpiry())
.percentilePrecision(distributionStatisticConfig.getPercentilePrecision());
final double[] sloNanos = distributionStatisticConfig.getServiceLevelObjectiveBoundaries();
if (sloNanos != null) {
Duration[] slo = new Duration[sloNanos.length];
for (int i = 0; i < sloNanos.length; i++) {
slo[i] = Duration.ofNanos((long) sloNanos[i]);
}
builder = builder.serviceLevelObjectives(slo);
}
return builder.register(registry);
}
static class CompositeSample extends Sample {
private final List samples;
private CompositeSample(List samples) {
this.samples = samples;
}
@Override
public long stop() {
return samples.stream().reduce(0L, (stopped, sample) -> sample.stop(), (s1, s2) -> s1);
}
@Override
public double duration(TimeUnit unit) {
return samples.stream().findAny().map(s -> s.duration(unit)).orElse(0.0);
}
}
}