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 org.apache.calcite.avatica.ha;
  
  import org.apache.calcite.avatica.ConnectionConfig;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Random;
  
  /**
   * Random Select strategy for client side load balancing.
   */
  public class RandomSelectLBStrategy implements LBStrategy {
    private static final Logger LOG = LoggerFactory.getLogger(RandomSelectLBStrategy.class);
    public static final String URL_SEPERATOR_CHAR = ",";
    private final Random random = new Random();
    @Override
    public String getLbURL(ConnectionConfig config) {
      String[] urls = config.getLbURLs().split(URL_SEPERATOR_CHAR);
      String url = urls[random.nextInt(urls.length)];
      LOG.info("Selected URL:{}", url);
      return url;
    }
  }
  