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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.common.util.concurrent;
import org.elasticsearch.common.Priority;
import java.util.concurrent.TimeUnit;
import java.util.function.LongSupplier;
public abstract class PrioritizedRunnable implements Runnable, Comparable {
private final Priority priority;
private final long creationDate;
private final LongSupplier relativeTimeProvider;
public static WrappedRunnable wrap(Runnable runnable, Priority priority) {
return new Wrapped(runnable, priority);
}
protected PrioritizedRunnable(Priority priority) {
this(priority, System::nanoTime);
}
// package visible for testing
PrioritizedRunnable(Priority priority, LongSupplier relativeTimeProvider) {
this.priority = priority;
this.creationDate = relativeTimeProvider.getAsLong();
this.relativeTimeProvider = relativeTimeProvider;
}
public long getCreationDateInNanos() {
return creationDate;
}
/**
* The elapsed time in milliseconds since this instance was created,
* as calculated by the difference between {@link System#nanoTime()}
* at the time of creation, and {@link System#nanoTime()} at the
* time of invocation of this method
*
* @return the age in milliseconds calculated
*/
public long getAgeInMillis() {
return TimeUnit.MILLISECONDS.convert(relativeTimeProvider.getAsLong() - creationDate, TimeUnit.NANOSECONDS);
}
@Override
public int compareTo(PrioritizedRunnable pr) {
return priority.compareTo(pr.priority);
}
public Priority priority() {
return priority;
}
static class Wrapped extends PrioritizedRunnable implements WrappedRunnable {
private final Runnable runnable;
private Wrapped(Runnable runnable, Priority priority) {
super(priority);
this.runnable = runnable;
}
@Override
public void run() {
runnable.run();
}
@Override
public Runnable unwrap() {
return runnable;
}
}
}