/*
 * Copyright © Red Gate Software Ltd 2010-2020
 *
 * 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 org.flywaydb.core.internal.strategy;

public class BackoffStrategy {

    private int current;
    private final int exponent;

    
Constructs an exponential backoff counter.
Params:
initial –   The initial integer to start the counter with
exponent –  The exponent by which to increase the counter value with on each call to next()/**
     * Constructs an exponential backoff counter.
     *
     * @param initial   The initial integer to start the counter with
     * @param exponent  The exponent by which to increase the counter value with on each call to {@link #next()}
     */
    public BackoffStrategy(int initial, int exponent) {
        this.current = initial;
        this.exponent = exponent;
    }

    
Returns:
The current value of the counter and immediately updates it with the next value/**
     *
     * @return The current value of the counter and immediately updates it with the next value
     */
    public int next() {
        int temp = current;
        current *= exponent;
        return temp;
    }

    
Returns:
The current value of the counter without updating it/**
     *
     * @return The current value of the counter without updating it
     */
    public int peek() {
        return current;
    }
}