com.alibaba.wasp.master.balancer.LoadBalancerFactory.java Source code

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Here is the source code for com.alibaba.wasp.master.balancer.LoadBalancerFactory.java

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/**
 * 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);
    }
}