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
020import org.apache.commons.logging.LogFactory;
021
022public class SimpleDelay implements Retry.Policy {
023
024    protected final int base;
025
026    protected final long delay;
027
028    protected int elapsed;
029
030    public SimpleDelay(int base, int delay) {
031        this.base = base;
032        this.delay = TimeUnit.MILLISECONDS.convert(delay, TimeUnit.SECONDS);
033    }
034
035    @Override
036    public boolean allow() {
037        return elapsed < delay;
038    }
039
040    @Override
041    public void pause() {
042        long computed = computeDelay();
043        LogFactory.getLog(SimpleDelay.class).warn("pausing for " + computed + " ms");
044        try {
045            Thread.sleep(computed);
046        } catch (InterruptedException e) {
047            Thread.currentThread().interrupt();
048        }
049        elapsed += computed;
050    }
051
052    protected long computeDelay() {
053        return base;
054    }
055
056}