001package org.apache.commons.jcs.auxiliary.disk.indexed;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import org.apache.commons.jcs.auxiliary.AbstractAuxiliaryCacheFactory;
023import org.apache.commons.jcs.auxiliary.AuxiliaryCacheAttributes;
024import org.apache.commons.jcs.engine.behavior.ICompositeCacheManager;
025import org.apache.commons.jcs.engine.behavior.IElementSerializer;
026import org.apache.commons.jcs.engine.logging.behavior.ICacheEventLogger;
027import org.apache.commons.logging.Log;
028import org.apache.commons.logging.LogFactory;
029
030/**
031 * Creates disk cache instances.
032 */
033public class IndexedDiskCacheFactory
034    extends AbstractAuxiliaryCacheFactory
035{
036    /** The logger. */
037    private static final Log log = LogFactory.getLog( IndexedDiskCacheFactory.class );
038
039    /**
040     * Create an instance of an IndexedDiskCache.
041     * <p>
042     * @param iaca cache attributes of this cache instance
043     * @param cacheMgr This allows auxiliaries to reference the manager without assuming that it is
044     *            a singleton. This will allow JCS to be a non-singleton. Also, it makes it easier to
045     *            test.
046     * @param cacheEventLogger
047     * @param elementSerializer
048     * @return IndexedDiskCache
049     */
050    @Override
051    public <K, V> IndexedDiskCache<K, V> createCache( AuxiliaryCacheAttributes iaca, ICompositeCacheManager cacheMgr,
052                                       ICacheEventLogger cacheEventLogger, IElementSerializer elementSerializer )
053    {
054        IndexedDiskCacheAttributes idca = (IndexedDiskCacheAttributes) iaca;
055        if ( log.isDebugEnabled() )
056        {
057            log.debug( "Creating DiskCache for attributes = " + idca );
058        }
059
060        IndexedDiskCache<K, V> cache = new IndexedDiskCache<K, V>( idca, elementSerializer );
061        cache.setCacheEventLogger( cacheEventLogger );
062
063        return cache;
064    }
065}