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.master.normalizer;
020
021import org.apache.hadoop.conf.Configuration;
022import org.apache.hadoop.hbase.HConstants;
023import org.apache.yetus.audience.InterfaceAudience;
024import org.apache.hadoop.util.ReflectionUtils;
025
026/**
027 * Factory to create instance of {@link RegionNormalizer} as configured.
028 */
029@InterfaceAudience.Private
030public final class RegionNormalizerFactory {
031
032  private RegionNormalizerFactory() {
033  }
034
035  /**
036   * Create a region normalizer from the given conf.
037   * @param conf configuration
038   * @return {@link RegionNormalizer} implementation
039   */
040  public static RegionNormalizer getRegionNormalizer(Configuration conf) {
041
042    // Create instance of Region Normalizer
043    Class<? extends RegionNormalizer> balancerKlass =
044      conf.getClass(HConstants.HBASE_MASTER_NORMALIZER_CLASS, SimpleRegionNormalizer.class,
045        RegionNormalizer.class);
046    return ReflectionUtils.newInstance(balancerKlass, conf);
047  }
048}