1 /** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 package org.apache.hadoop.hbase.mob; 20 21 import org.apache.hadoop.hbase.classification.InterfaceAudience; 22 import org.apache.hadoop.conf.Configuration; 23 import org.apache.hadoop.hbase.HColumnDescriptor; 24 import org.apache.hadoop.hbase.io.hfile.CacheConfig; 25 26 /** 27 * The cache configuration for the mob. 28 */ 29 @InterfaceAudience.Private 30 public class MobCacheConfig extends CacheConfig { 31 32 private static MobFileCache mobFileCache; 33 34 public MobCacheConfig(Configuration conf, HColumnDescriptor family) { 35 super(conf, family); 36 instantiateMobFileCache(conf); 37 } 38 39 public MobCacheConfig(Configuration conf) { 40 super(conf); 41 instantiateMobFileCache(conf); 42 } 43 44 /** 45 * Instantiates the MobFileCache. 46 * @param conf The current configuration. 47 * @return The current instance of MobFileCache. 48 */ 49 public static synchronized MobFileCache instantiateMobFileCache(Configuration conf) { 50 if (mobFileCache == null) { 51 mobFileCache = new MobFileCache(conf); 52 } 53 return mobFileCache; 54 } 55 56 /** 57 * Gets the MobFileCache. 58 * @return The MobFileCache. 59 */ 60 public MobFileCache getMobFileCache() { 61 return mobFileCache; 62 } 63 }