com.jagrosh.discordipc.impl.Backoff Maven / Gradle / Ivy

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package com.jagrosh.discordipc.impl;

import java.util.Random;

public class Backoff {
    private final long minAmount;
    private final long maxAmount;
    private final Random randGenerator;
    private long current;
    private int fails;

    public Backoff(long min, long max) {
        this.minAmount = min;
        this.maxAmount = max;
        this.current = min;
        this.fails = 0;
        this.randGenerator = new Random();
    }

    public void reset() {
        fails = 0;
        current = minAmount;
    }

    public long nextDelay() {
        fails++;
        double delay = current * 2.0 * rand01();
        current = Math.min(current + (long) delay, maxAmount);
        return current;
    }

    private double rand01() {
        return randGenerator.nextDouble();
    }
}