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Type safe Actor Model toolkit for reactive concurrency and resiliency using Java and other JVM languages.
// Copyright © 2012-2018 Vaughn Vernon. All rights reserved.
//
// This Source Code Form is subject to the terms of the
// Mozilla Public License, v. 2.0. If a copy of the MPL
// was not distributed with this file, You can obtain
// one at https://mozilla.org/MPL/2.0/.
package io.vlingo.actors;
public final class Backoff {
private static final long BACKOFF_CAP = 4096;
private static final long BACKOFF_RESET = 0L;
private static final long BACKOFF_START = 1L;
private long backoff;
private final boolean fixed;
public Backoff() {
backoff = BACKOFF_RESET;
fixed = false;
}
public Backoff(final long fixedBackoff) {
backoff = fixedBackoff;
fixed = true;
}
public void now() {
if (!fixed) {
if (backoff == BACKOFF_RESET) {
backoff = BACKOFF_START;
} else if (backoff < BACKOFF_CAP) {
backoff = backoff * 2;
}
}
yieldFor(backoff);
}
public void reset() {
backoff = BACKOFF_RESET;
}
private void yieldFor(long aMillis) {
try {
Thread.sleep(aMillis);
} catch (InterruptedException e) {
// ignore
}
}
}