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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 org.apache.cassandra.stress.settings;
  
  import java.io.Serializable;
  import java.util.List;
  import java.util.Map;
  
  import com.google.common.collect.ImmutableList;
  import com.google.common.primitives.Ints;
  
  import org.apache.cassandra.stress.util.ResultLogger;
  
  public class SettingsTokenRange implements Serializable
  {
      public final boolean wrap;
      public final int splitFactor;
      private final TokenRangeOptions options;
  
      private SettingsTokenRange(TokenRangeOptions options)
      {
          this.options = options;
          this.wrap = options.wrap.setByUser();
          this.splitFactor = Ints.checkedCast(OptionDistribution.parseLong(options.splitFactor.value()));
      }
  
      private static final class TokenRangeOptions extends GroupedOptions
      {
          final OptionSimple wrap = new OptionSimple("wrap", "", null, "Re-use token ranges in order to terminate stress iterations", false);
          final OptionSimple splitFactor = new OptionSimple("split-factor=", "[0-9]+[bmk]?", "1", "Split every token range by this factor", false);
  
  
          @Override
          public List<? extends Option> options()
          {
              return ImmutableList.<Option>builder().add(wrap, splitFactor).build();
          }
      }
  
      public static SettingsTokenRange get(Map<String, String[]> clArgs)
      {
          String[] params = clArgs.remove("-tokenrange");
          if (params == null)
          {
              return new SettingsTokenRange(new TokenRangeOptions());
          }
          TokenRangeOptions options = GroupedOptions.select(params, new TokenRangeOptions());
          if (options == null)
          {
              printHelp();
              System.out.println("Invalid -tokenrange options provided, see output for valid options");
              System.exit(1);
          }
          return new SettingsTokenRange(options);
      }
  
      public void printSettings(ResultLogger out)
      {
          out.printf("  Wrap: %b%n", wrap);
          out.printf("  Split Factor: %d%n", splitFactor);
      }
  
      public static void printHelp()
      {
          GroupedOptions.printOptions(System.out, "-tokenrange", new TokenRangeOptions());
      }
  
      public static Runnable helpPrinter()
      {
          return SettingsTokenRange::printHelp;
      }
  }
  