001 /*
002 * Java Genetic Algorithm Library (jenetics-1.6.0).
003 * Copyright (c) 2007-2014 Franz Wilhelmstötter
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 *
017 * Author:
018 * Franz Wilhelmstötter (franz.wilhelmstoetter@gmx.at)
019 */
020 package org.jenetics.internal.util;
021
022 import static java.lang.String.format;
023
024 import java.io.BufferedReader;
025 import java.io.IOException;
026 import java.io.InputStreamReader;
027 import java.io.OutputStream;
028 import java.text.SimpleDateFormat;
029 import java.util.ArrayList;
030 import java.util.Date;
031 import java.util.List;
032 import java.util.Objects;
033 import java.util.Random;
034
035
036 /**
037 * Class for testing a given random engine using the
038 * <a href="http://www.phy.duke.edu/~rgb/General/dieharder.php">dieharder</a>
039 * test application.
040 *
041 * @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
042 * @since 1.5
043 * @version 1.5 — <em>$Date: 2014-02-15 $</em>
044 */
045 public final class DieHarder {
046
047 /**
048 * Writes random numbers to an given data output stream.
049 *
050 * @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
051 * @since 1.5
052 * @version 1.5 — <em>$Date: 2014-02-15 $</em>
053 */
054 private static final class Randomizer implements Runnable {
055 private final Random _random;
056 private final OutputStream _out;
057
058 public Randomizer(final Random random, final OutputStream out) {
059 _random = Objects.requireNonNull(random);
060 _out = Objects.requireNonNull(out);
061 }
062
063 @Override
064 public void run() {
065 try {
066 final byte[] data = new byte[4096];
067 while (!Thread.currentThread().isInterrupted()) {
068 _random.nextBytes(data);
069 _out.write(data);
070 }
071 } catch (IOException ignore) {
072 }
073 }
074
075 }
076
077 public static void main(final String[] args) throws Exception {
078 if ( args.length < 1) {
079 println("Usage: java org.jenetics.internal.util.DieHarder <random-class-name>");
080 return;
081 }
082
083 final String randomName = args[0];
084 Random random = null;
085 try {
086 random = (Random)Class.forName(randomName).newInstance();
087 printt(
088 "Testing: %s (%s)",
089 randomName,
090 new SimpleDateFormat("yyyy-MM-dd HH:mm").format(new Date())
091 );
092 } catch (Exception e) {
093 System.out.println("Can't create random class " + randomName);
094 return;
095 }
096
097 final List<String> dieharderArgs = new ArrayList<>();
098 dieharderArgs.add("dieharder");
099 for (int i = 1; i < args.length; ++i) {
100 dieharderArgs.add(args[i]);
101 }
102 dieharderArgs.add("-g");
103 dieharderArgs.add("200");
104
105 printv();
106
107 final long start = System.currentTimeMillis();
108 final ProcessBuilder builder = new ProcessBuilder(dieharderArgs);
109 final Process dieharder = builder.start();
110
111 final Thread randomizer = new Thread(new Randomizer(
112 random,
113 dieharder.getOutputStream()
114 ));
115 randomizer.start();
116
117 final BufferedReader stdout = new BufferedReader (
118 new InputStreamReader(dieharder.getInputStream())
119 );
120 String line = null;
121 while ((line = stdout.readLine()) != null) {
122 System.out.println(line);
123 }
124
125 dieharder.waitFor();
126 randomizer.interrupt();
127 final long sec = (System.currentTimeMillis() - start)/1000;
128
129 printt("Runtime: %d:%02d:%02d", sec/3600, (sec%3600)/60, (sec%60));
130
131 }
132
133 private static void printt(final String title, final Object... args) {
134 println("#=============================================================================#");
135 println("# %-76s#", format(title, args));
136 println("#=============================================================================#");
137 }
138
139 private static void printv() {
140 println("#=============================================================================#");
141 println(
142 "# %-76s#",
143 format("%s %s (%s) ", p("os.name"), p("os.version"), p("os.arch"))
144 );
145 println(
146 "# %-76s#",
147 format("java version \"%s\"", p("java.version"))
148 );
149 println(
150 "# %-76s#",
151 format("%s (build %s)", p("java.runtime.name"), p("java.runtime.version"))
152 );
153 println(
154 "# %-76s#",
155 format("%s (build %s)", p("java.vm.name"), p("java.vm.version"))
156 );
157 println("#=============================================================================#");
158 }
159
160 private static String p(final String name) {
161 return System.getProperty(name);
162 }
163
164 private static void println(final String pattern, final Object... args) {
165 System.out.println(format(pattern, args));
166 }
167
168 }
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