content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.wasp.master.balancer;
  
  import com.alibaba.wasp.FConstants;
  import com.alibaba.wasp.master.LoadBalancer;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.util.ReflectionUtils;
  
  /**
   * The class that creates a load balancer from a conf.
   */
  public class LoadBalancerFactory {
  
    /**
     * Create a loadblanacer from the given conf.
     * @param conf
     * @return A {@link com.alibaba.wasp.master.LoadBalancer}
     */
    public static LoadBalancer getLoadBalancer(Configuration conf) {
      // Create the balancer
      Class<? extends LoadBalancer> balancerClass = conf.getClass(
          FConstants.WASP_MASTER_LOADBALANCER_CLASS,
          DefaultLoadBalancer.class, LoadBalancer.class);
      return ReflectionUtils.newInstance(balancerClass, conf);
    }
  }
  