001/*
002 * (C) Copyright 2014-2015 Nuxeo SA (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Thierry Delprat
016 *     Florent Guillaume
017 */
018package org.nuxeo.ecm.core.redis.contribs;
019
020import org.apache.commons.logging.Log;
021import org.apache.commons.logging.LogFactory;
022import org.nuxeo.ecm.core.api.NuxeoException;
023import org.nuxeo.ecm.core.redis.RedisAdmin;
024import org.nuxeo.ecm.core.redis.RedisCallable;
025import org.nuxeo.ecm.core.redis.RedisExecutor;
026import org.nuxeo.ecm.core.uidgen.AbstractUIDSequencer;
027import org.nuxeo.runtime.api.Framework;
028
029import redis.clients.jedis.Jedis;
030import redis.clients.jedis.exceptions.JedisException;
031
032/**
033 * Redis-based UID generator.
034 *
035 * @since 7.4
036 */
037public class RedisUIDSequencer extends AbstractUIDSequencer {
038
039    protected static final Log log = LogFactory.getLog(RedisUIDSequencer.class);
040
041    protected String namespace;
042
043    @Override
044    public void init() {
045        RedisAdmin redisAdmin = Framework.getService(RedisAdmin.class);
046        namespace = redisAdmin.namespace("counters");
047    }
048
049    @Override
050    public void dispose() {
051    }
052
053    @Override
054    public int getNext(String key) {
055        RedisExecutor executor = Framework.getService(RedisExecutor.class);
056        try {
057            return executor.execute(new RedisCallable<Long>() {
058                @Override
059                public Long call(Jedis jedis) {
060                    return jedis.incr(namespace + key);
061                }
062            }).intValue();
063        } catch (JedisException e) {
064            throw new NuxeoException(e);
065        }
066    }
067
068}