001/*
002 * (C) Copyright 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 *
016 * Contributors:
017 *     Maxime Hilaire
018 *
019 */
020package org.nuxeo.ecm.core.cache;
021
022import java.io.Serializable;
023import java.util.concurrent.TimeUnit;
024
025import org.apache.commons.logging.Log;
026import org.apache.commons.logging.LogFactory;
027
028import com.google.common.cache.Cache;
029import com.google.common.cache.CacheBuilder;
030
031/**
032 * Default in memory implementation for cache management based on guava
033 *
034 * @since 6.0
035 */
036public class InMemoryCacheImpl extends AbstractCache {
037
038    public InMemoryCacheImpl(CacheDescriptor desc) {
039        super(desc);
040        CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
041        builder = builder.expireAfterWrite(desc.ttl, TimeUnit.MINUTES);
042        if (desc.options.containsKey("concurrencyLevel")) {
043            builder = builder.concurrencyLevel(Integer.valueOf(desc.options.get("concurrencyLevel")).intValue());
044        }
045        if (desc.options.containsKey("maxSize")) {
046            builder = builder.maximumSize(Integer.valueOf(desc.options.get("maxSize")).intValue());
047        }
048        cache = builder.build();
049    }
050
051    protected static final Log log = LogFactory.getLog(InMemoryCacheImpl.class);
052
053    protected final Cache<String, Serializable> cache;
054
055    /**
056     * Get the instance cache
057     *
058     * @return the Guava instance cache used in this nuxeo cache
059     * @since 6.0
060     */
061    public Cache<String, Serializable> getGuavaCache() {
062        return cache;
063    }
064
065    @Override
066    public Serializable get(String key) {
067        if (key == null) {
068            return null;
069        } else {
070            return cache.getIfPresent(key);
071        }
072    }
073
074    @Override
075    public void invalidate(String key) {
076        if (key != null) {
077            cache.invalidate(key);
078        } else {
079            log.warn(String.format("Can't invalidate a null key for the cache '%s'!", name));
080        }
081    }
082
083    @Override
084    public void invalidateAll() {
085        cache.invalidateAll();
086    }
087
088    @Override
089    public void put(String key, Serializable value) {
090        if (key != null && value != null) {
091            cache.put(key, value);
092        } else {
093            log.warn(String.format("Can't put a null key nor a null value in the cache '%s'!", name));
094        }
095    }
096
097    @Override
098    public boolean hasEntry(String key) {
099        return cache.asMap().containsKey(key);
100    }
101
102}