content: package org.apache.cassandra.stress.settings;
  /*
   *
   * 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.
   *
   */
  
  
  import java.io.Serializable;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.cassandra.stress.util.ResultLogger;
  
  public class SettingsRate implements Serializable
  {
  
      public final boolean auto;
      public final int minThreads;
      public final int maxThreads;
      public final int threadCount;
      public final int opsPerSecond;
      public final boolean isFixed;
  
      public SettingsRate(ThreadOptions options)
      {
          auto = false;
          threadCount = Integer.parseInt(options.threads.value());
          String throttleOpt = options.throttle.value();
          String fixedOpt = options.fixed.value();
          int throttle = Integer.parseInt(throttleOpt.substring(0, throttleOpt.length() - 2));
          int fixed = Integer.parseInt(fixedOpt.substring(0, fixedOpt.length() - 2));
          if(throttle != 0 && fixed != 0)
              throw new IllegalArgumentException("can't have both fixed and throttle set, choose one.");
          opsPerSecond = Math.max(fixed, throttle);
          isFixed = (opsPerSecond == fixed);
  
          minThreads = -1;
          maxThreads = -1;
      }
  
      public SettingsRate(AutoOptions auto)
      {
          this.auto = auto.auto.setByUser();
          this.minThreads = Integer.parseInt(auto.minThreads.value());
          this.maxThreads = Integer.parseInt(auto.maxThreads.value());
          this.threadCount = -1;
          this.opsPerSecond = 0;
          isFixed = false;
      }
  
  
      // Option Declarations
  
      private static final class AutoOptions extends GroupedOptions
      {
          final OptionSimple auto = new OptionSimple("auto", "", null, "stop increasing threads once throughput saturates", false);
          final OptionSimple minThreads = new OptionSimple("threads>=", "[0-9]+", "4", "run at least this many clients concurrently", false);
          final OptionSimple maxThreads = new OptionSimple("threads<=", "[0-9]+", "1000", "run at most this many clients concurrently", false);
  
          @Override
          public List<? extends Option> options()
          {
              return Arrays.asList(minThreads, maxThreads, auto);
          }
      }
  
      private static final class ThreadOptions extends GroupedOptions
      {
          final OptionSimple threads = new OptionSimple("threads=", "[0-9]+", null, "run this many clients concurrently", true);
          final OptionSimple throttle = new OptionSimple("throttle=", "[0-9]+/s", "0/s", "throttle operations per second across all clients to a maximum rate (or less) with no implied schedule", false);
          final OptionSimple fixed = new OptionSimple("fixed=", "[0-9]+/s", "0/s", "expect fixed rate of operations per second across all clients with implied schedule", false);
  
          @Override
          public List<? extends Option> options()
          {
              return Arrays.asList(threads, throttle, fixed);
          }
      }
  
      // CLI Utility Methods
  
      public void printSettings(ResultLogger out)
      {
          out.printf("  Auto: %b%n", auto);
          if (auto)
          {
              out.printf("  Min Threads: %d%n", minThreads);
              out.printf("  Max Threads: %d%n", maxThreads);
          } else {
              out.printf("  Thread Count: %d%n", threadCount);
              out.printf("  OpsPer Sec: %d%n", opsPerSecond);
          }
      }
  
      public static SettingsRate get(Map<String, String[]> clArgs, SettingsCommand command)
      {
          String[] params = clArgs.remove("-rate");
          if (params == null)
          {
              switch (command.type)
              {
                  case WRITE:
                  case COUNTER_WRITE:
                      if (command.count > 0)
                      {
                          ThreadOptions options = new ThreadOptions();
                          options.accept("threads=200");
                          return new SettingsRate(options);
                      }
              }
              AutoOptions options = new AutoOptions();
              options.accept("auto");
              return new SettingsRate(options);
          }
          GroupedOptions options = GroupedOptions.select(params, new AutoOptions(), new ThreadOptions());
          if (options == null)
          {
              printHelp();
              System.out.println("Invalid -rate options provided, see output for valid options");
              System.exit(1);
          }
          if (options instanceof AutoOptions)
              return new SettingsRate((AutoOptions) options);
          else if (options instanceof ThreadOptions)
              return new SettingsRate((ThreadOptions) options);
          else
              throw new IllegalStateException();
      }
  
      public static void printHelp()
      {
          GroupedOptions.printOptions(System.out, "-rate", new ThreadOptions(), new AutoOptions());
      }
  
      public static Runnable helpPrinter()
      {
          return SettingsRate::printHelp;
      }
  }
  
  