1 /**
2 * Copyright 2011 The Apache Software Foundation
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package org.apache.hadoop.hbase.master;
22
23 import org.apache.hadoop.conf.Configuration;
24 import org.apache.hadoop.util.ReflectionUtils;
25
26 /**
27 * The class that creates a load balancer from a conf.
28 */
29 public class LoadBalancerFactory {
30
31 /**
32 * Create a loadblanacer from the given conf.
33 * @param conf
34 * @return A {@link LoadBalancer}
35 */
36 public static LoadBalancer getLoadBalancer(Configuration conf) {
37
38 // Create the balancer
39 Class<? extends LoadBalancer> balancerKlass = conf.getClass("hbase.maser.loadBalancer.class",DefaultLoadBalancer.class, LoadBalancer.class);
40 return ReflectionUtils.newInstance(balancerKlass, conf);
41
42 }
43 }