com.netflix.spectator.api.DefaultLongTaskTimer Maven / Gradle / Ivy
/**
* Copyright 2015 Netflix, 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.netflix.spectator.api;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
/** Long task timer implementation used by the extended registry. */
final class DefaultLongTaskTimer implements LongTaskTimer {
private static final double NANOS_PER_SECOND = (double) TimeUnit.SECONDS.toNanos(1L);
private final Clock clock;
private final Id id;
private final ConcurrentMap tasks = new ConcurrentHashMap<>();
private final AtomicLong nextTask = new AtomicLong(0L);
/** Create a new instance. */
DefaultLongTaskTimer(Clock clock, Id id) {
this.clock = clock;
this.id = id;
}
@Override public Id id() {
return id;
}
@Override public boolean hasExpired() {
return false;
}
@Override public long start() {
long task = nextTask.getAndIncrement();
tasks.put(task, clock.monotonicTime());
return task;
}
@Override public long stop(long task) {
Long startTime = tasks.get(task);
if (startTime != null) {
tasks.remove(task);
return clock.monotonicTime() - startTime;
} else {
return -1L;
}
}
@Override public long duration(long task) {
Long startTime = tasks.get(task);
return (startTime != null) ? (clock.monotonicTime() - startTime) : -1L;
}
@Override public long duration() {
long now = clock.monotonicTime();
long sum = 0L;
for (long startTime : tasks.values()) {
sum += now - startTime;
}
return sum;
}
@Override public int activeTasks() {
return tasks.size();
}
@Override public Iterable measure() {
final List ms = new ArrayList<>(2);
final long now = clock.wallTime();
final double durationSeconds = duration() / NANOS_PER_SECOND;
ms.add(new Measurement(id.withTag(Statistic.duration), now, durationSeconds));
ms.add(new Measurement(id.withTag(Statistic.activeTasks), now, activeTasks()));
return ms;
}
}