001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.core.util;
015
016/**
017 * A default {@link DelayStrategy} that implements a simple fixed delay.
018 *
019 * @author Carl Harris
020 * @since 1.1.0
021 */
022public class FixedDelay implements DelayStrategy {
023
024    private final long subsequentDelay;
025    private long nextDelay;
026
027    /**
028     * Initialize a new {@code FixedDelay} with a given {@code initialDelay} and
029     * {@code subsequentDelay}.
030     *
031     * @param initialDelay    value for the initial delay
032     * @param subsequentDelay value for all other delays
033     */
034    public FixedDelay(long initialDelay, long subsequentDelay) {
035        this.nextDelay = initialDelay;
036        this.subsequentDelay = subsequentDelay;
037    }
038
039    /**
040     * Initialize a new {@code FixedDelay} with fixed delay value given by
041     * {@code delay} parameter.
042     *
043     * @param delay value for all delays
044     */
045    public FixedDelay(int delay) {
046        this(delay, delay);
047    }
048
049    /**
050     * {@inheritDoc}
051     */
052    public long nextDelay() {
053        long delay = nextDelay;
054        nextDelay = subsequentDelay;
055        return delay;
056    }
057
058}