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.IOException;
  import java.io.PrintStream;
  import java.io.Serializable;
  import java.net.URL;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Map;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import com.google.common.base.Charsets;
  import com.google.common.io.Resources;
  
  import org.apache.cassandra.stress.generate.Distribution;
  
  import static org.apache.cassandra.utils.LocalizeString.toLowerCaseLocalized;
  
  class SettingsMisc implements Serializable
  {
  
      static boolean maybeDoSpecial(Map<String, String[]> clArgs)
      {
          if (maybePrintHelp(clArgs))
              return true;
          if (maybePrintDistribution(clArgs))
              return true;
          if (maybePrintVersion(clArgs))
              return true;
          return false;
      }
  
      private static final class PrintDistribution extends GroupedOptions
      {
          final OptionDistribution dist = new OptionDistribution("dist=", null, "A mathematical distribution");
  
          @Override
          public List<? extends Option> options()
          {
              return Arrays.asList(dist);
          }
      }
  
  
      private static boolean maybePrintDistribution(Map<String, String[]> clArgs)
      {
          final String[] args = clArgs.get("print");
          if (args == null)
              return false;
          final PrintDistribution dist = new PrintDistribution();
          if (null == GroupedOptions.select(args, dist))
          {
              printHelpPrinter().run();
              System.out.println("Invalid print options provided, see output for valid options");
              System.exit(1);
          }
          printDistribution(dist.dist.get().get());
          return true;
      }
  
      private static void printDistribution(Distribution dist)
      {
          PrintStream out = System.out;
          out.println("% of samples    Range       % of total");
          String format = "%-16.1f%-12d%12.1f";
          double rangemax = dist.inverseCumProb(1d) / 100d;
          for (double d : new double[]{ 0.1d, 0.2d, 0.3d, 0.4d, 0.5d, 0.6d, 0.7d, 0.8d, 0.9d, 0.95d, 0.99d, 1d })
          {
              double sampleperc = d * 100;
              long max = dist.inverseCumProb(d);
              double rangeperc = max / rangemax;
              out.println(String.format(format, sampleperc, max, rangeperc));
          }
      }
  
      private static boolean maybePrintHelp(Map<String, String[]> clArgs)
      {
          if (!clArgs.containsKey("-?") && !clArgs.containsKey("help"))
              return false;
          String[] params = clArgs.remove("-?");
          if (params == null)
              params = clArgs.remove("help");
          if (params.length == 0)
          {
              if (!clArgs.isEmpty())
              {
                  if (clArgs.size() == 1)
                  {
                      String p = clArgs.keySet().iterator().next();
                      if (clArgs.get(p).length == 0)
                          params = new String[]{ p };
                  }
              }
              else
              {
                  printHelp();
                  return true;
              }
          }
          if (params.length == 1)
          {
              printHelp(params[0]);
              return true;
          }
          throw new IllegalArgumentException("Invalid command/option provided to help");
      }
  
      private static boolean maybePrintVersion(Map<String, String[]> clArgs)
      {
          if (clArgs.containsKey("version"))
          {
              try
              {
                  URL url = Resources.getResource("org/apache/cassandra/config/version.properties");
                  System.out.println(parseVersionFile(Resources.toString(url, Charsets.UTF_8)));
              }
              catch (IOException e)
              {
                  e.printStackTrace(System.err);
              }
              return true;
          }
          return false;
      }
  
      static String parseVersionFile(String versionFileContents)
      {
          Matcher matcher = Pattern.compile(".*?CassandraVersion=(.*?)$").matcher(versionFileContents);
          if (matcher.find())
          {
              return "Version: " + matcher.group(1);
          }
          else
          {
              return "Unable to find version information";
          }
      }
  
      public static void printHelp()
      {
          System.out.println("Usage:      cassandra-stress <command> [options]");
          System.out.println("Help usage: cassandra-stress help <command>");
          System.out.println();
          System.out.println("---Commands---");
          for (Command cmd : Command.values())
          {
              System.out.println(String.format("%-20s : %s", toLowerCaseLocalized(cmd.toString()), cmd.description));
          }
          System.out.println();
          System.out.println("---Options---");
          for (CliOption cmd : CliOption.values())
          {
              System.out.println(String.format("-%-20s : %s", toLowerCaseLocalized(cmd.toString()), cmd.description));
          }
      }
  
      public static void printHelp(String command)
      {
          Command cmd = Command.get(command);
          if (cmd != null)
          {
              cmd.printHelp();
              return;
          }
          CliOption opt = CliOption.get(command);
          if (opt != null)
          {
              opt.printHelp();
              return;
          }
          printHelp();
          throw new IllegalArgumentException("Invalid command or option provided to command help");
      }
  
      static Runnable helpHelpPrinter()
      {
          return () -> {
              System.out.println("Usage: ./bin/cassandra-stress help <command|option>");
              System.out.println("Commands:");
              for (Command cmd : Command.values())
                  System.out.println("    " + cmd.names.toString().replaceAll("\\[|\\]", ""));
              System.out.println("Options:");
              for (CliOption op : CliOption.values())
                  System.out.println("    -" + toLowerCaseLocalized(op.toString()) + (op.extraName != null ? ", " + op.extraName : ""));
          };
      }
  
      static Runnable printHelpPrinter()
      {
          return () -> GroupedOptions.printOptions(System.out, "print", new GroupedOptions()
          {
              @Override
              public List<? extends Option> options()
              {
                  return Arrays.asList(new OptionDistribution("dist=", null, "A mathematical distribution"));
              }
          });
      }
  }
  