org.elasticsearch.common.util.CombinedRateLimiter Maven / Gradle / Ivy
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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;
import org.apache.lucene.store.RateLimiter;
import org.elasticsearch.common.unit.ByteSizeValue;
import java.util.concurrent.atomic.AtomicLong;
/**
* A rate limiter designed for multiple concurrent users.
*/
public class CombinedRateLimiter {
// TODO: This rate limiter has some concurrency issues between the two maybePause operations
private final AtomicLong bytesSinceLastPause = new AtomicLong();
private final RateLimiter.SimpleRateLimiter rateLimiter;
private volatile boolean rateLimit;
public CombinedRateLimiter(ByteSizeValue maxBytesPerSec) {
rateLimit = maxBytesPerSec.getBytes() > 0;
rateLimiter = new RateLimiter.SimpleRateLimiter(maxBytesPerSec.getMbFrac());
}
public long maybePause(int bytes) {
if (rateLimit) {
long bytesSincePause = bytesSinceLastPause.addAndGet(bytes);
if (bytesSincePause > rateLimiter.getMinPauseCheckBytes()) {
// Time to pause
bytesSinceLastPause.addAndGet(-bytesSincePause);
return Math.max(rateLimiter.pause(bytesSincePause), 0);
}
}
return 0;
}
public void setMBPerSec(ByteSizeValue maxBytesPerSec) {
rateLimit = maxBytesPerSec.getBytes() > 0;
rateLimiter.setMBPerSec(maxBytesPerSec.getMbFrac());
}
public double getMBPerSec() {
return rateLimiter.getMBPerSec();
}
}