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.master.normalizer;
20
21 import org.apache.hadoop.conf.Configuration;
22 import org.apache.hadoop.hbase.HConstants;
23 import org.apache.hadoop.hbase.classification.InterfaceAudience;
24 import org.apache.hadoop.util.ReflectionUtils;
25
26 /**
27 * Factory to create instance of {@link RegionNormalizer} as configured.
28 */
29 @InterfaceAudience.Private
30 public final class RegionNormalizerFactory {
31
32 private RegionNormalizerFactory() {
33 }
34
35 /**
36 * Create a region normalizer from the given conf.
37 * @param conf configuration
38 * @return {@link RegionNormalizer} implementation
39 */
40 public static RegionNormalizer getRegionNormalizer(Configuration conf) {
41
42 // Create instance of Region Normalizer
43 Class<? extends RegionNormalizer> balancerKlass =
44 conf.getClass(HConstants.HBASE_MASTER_NORMALIZER_CLASS, SimpleRegionNormalizer.class,
45 RegionNormalizer.class);
46 return ReflectionUtils.newInstance(balancerKlass, conf);
47 }
48 }