001/* 002 * (C) Copyright 2014-2015 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 * 016 * Contributors: 017 * Thierry Delprat 018 * Florent Guillaume 019 */ 020package org.nuxeo.ecm.core.redis.contribs; 021 022import java.util.ArrayList; 023import java.util.List; 024 025import org.apache.commons.logging.Log; 026import org.apache.commons.logging.LogFactory; 027import org.nuxeo.ecm.core.api.NuxeoException; 028import org.nuxeo.ecm.core.redis.RedisAdmin; 029import org.nuxeo.ecm.core.redis.RedisExecutor; 030import org.nuxeo.ecm.core.uidgen.AbstractUIDSequencer; 031import org.nuxeo.runtime.api.Framework; 032 033import redis.clients.jedis.exceptions.JedisException; 034 035/** 036 * Redis-based UID generator. 037 * 038 * @since 7.4 039 */ 040public class RedisUIDSequencer extends AbstractUIDSequencer { 041 042 protected static final Log log = LogFactory.getLog(RedisUIDSequencer.class); 043 044 protected String namespace; 045 046 @Override 047 public void init() { 048 RedisAdmin redisAdmin = Framework.getService(RedisAdmin.class); 049 namespace = redisAdmin.namespace("counters"); 050 } 051 052 @Override 053 public void dispose() { 054 } 055 056 @Override 057 public void initSequence(String key, long id) { 058 RedisExecutor executor = Framework.getService(RedisExecutor.class); 059 try { 060 executor.execute(jedis -> jedis.set(namespace + key, String.valueOf(id))); 061 } catch (JedisException e) { 062 throw new NuxeoException(e); 063 } 064 } 065 066 @Override 067 public long getNextLong(String key) { 068 RedisExecutor executor = Framework.getService(RedisExecutor.class); 069 try { 070 return executor.execute(jedis -> jedis.incr(namespace + key)); 071 } catch (JedisException e) { 072 throw new NuxeoException(e); 073 } 074 } 075 076 @Override 077 public List<Long> getNextBlock(String key, int blockSize) { 078 List<Long> ret = new ArrayList<>(blockSize); 079 if (blockSize == 1) { 080 ret.add(getNextLong(key)); 081 return ret; 082 } 083 RedisExecutor executor = Framework.getService(RedisExecutor.class); 084 long last; 085 try { 086 last = executor.execute(jedis -> jedis.incrBy(namespace + key, blockSize)); 087 } catch (JedisException e) { 088 throw new NuxeoException(e); 089 } 090 for (int i = blockSize - 1; i >= 0; i--) { 091 ret.add(last - i); 092 } 093 return ret; 094 } 095}