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 }