001/**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.hadoop.hbase.mob;
020
021import org.apache.hadoop.conf.Configuration;
022import org.apache.yetus.audience.InterfaceAudience;
023import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;
024import org.apache.hadoop.hbase.io.hfile.CacheConfig;
025
026/**
027 * The cache configuration for the mob.
028 */
029@InterfaceAudience.Private
030public class MobCacheConfig extends CacheConfig {
031
032  private static MobFileCache mobFileCache;
033
034  public MobCacheConfig(Configuration conf, ColumnFamilyDescriptor family) {
035    super(conf, family);
036    instantiateMobFileCache(conf);
037  }
038
039  public MobCacheConfig(Configuration conf) {
040    super(conf);
041    instantiateMobFileCache(conf);
042  }
043
044  /**
045   * Instantiates the MobFileCache.
046   * @param conf The current configuration.
047   * @return The current instance of MobFileCache.
048   */
049  public static synchronized MobFileCache instantiateMobFileCache(Configuration conf) {
050    if (mobFileCache == null) {
051      mobFileCache = new MobFileCache(conf);
052    }
053    return mobFileCache;
054  }
055
056  /**
057   * Gets the MobFileCache.
058   * @return The MobFileCache.
059   */
060  public MobFileCache getMobFileCache() {
061    return mobFileCache;
062  }
063}