001/*
002 * (C) Copyright 2006-2014 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.nuxeo.ecm.core.redis.retry;
017
018import java.util.concurrent.TimeUnit;
019
020public class ExponentialBackofDelay extends SimpleDelay {
021
022    protected int attempt;
023
024    public ExponentialBackofDelay(int base, int delay) {
025        super(base, delay);
026    }
027
028    @Override
029    protected long computeDelay() {
030        int delay = base * (1 << ++attempt);
031        return TimeUnit.MILLISECONDS.convert(delay, TimeUnit.SECONDS);
032    }
033
034}