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.PrintStream;
import java.io.Serializable;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import org.apache.cassandra.stress.generate.Distribution;
public class SettingsMisc implements Serializable
{
static boolean maybeDoSpecial(Map<String, String[]> clArgs)
{
if (maybePrintHelp(clArgs))
return true;
if (maybePrintDistribution(clArgs))
return true;
return false;
}
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);
}
}
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;
}
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");
}
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", cmd.toString().toLowerCase(), cmd.description));
}
System.out.println();
System.out.println("---Options---");
for (CliOption cmd : CliOption.values())
{
System.out.println(String.format("-%-20s : %s", cmd.toString().toLowerCase(), 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");
}
public static Runnable helpHelpPrinter()
{
return new Runnable()
{
@Override
public void run()
{
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(" -" + op.toString().toLowerCase() + (op.extraName != null ? ", " + op.extraName : ""));
}
};
}
public static Runnable printHelpPrinter()
{
return new Runnable()
{
@Override
public void run()
{
GroupedOptions.printOptions(System.out, "print", new GroupedOptions()
{
@Override
public List<? extends Option> options()
{
return Arrays.asList(new OptionDistribution("dist=", null, "A mathematical distribution"));
}
});
}
};
}
public static Runnable sendToDaemonHelpPrinter()
{
return new Runnable()
{
@Override
public void run()
{
System.out.println("Usage: -sendToDaemon <host>");
System.out.println();
System.out.println("Specify a host running the stress server to send this stress command to");
}
};
}
public static String getSendToDaemon(Map<String, String[]> clArgs)
{
String[] params = clArgs.remove("-send-to");
if (params == null)
params = clArgs.remove("-sendto");
if (params == null)
return null;
if (params.length != 1)
{
sendToDaemonHelpPrinter().run();
System.out.println("Invalid -send-to specifier: " + Arrays.toString(params));
System.exit(1);
}
return params[0];
}
}