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 }