1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.util.ArrayList; 25 import java.util.Enumeration; 26 import java.util.List; 27 import java.util.jar.JarEntry; 28 import java.util.jar.JarFile; 29 import java.util.regex.Matcher; 30 import java.util.regex.Pattern; 31 32 abstract class Task<T> implements Runnable { 33 private transient boolean working = true; 34 private final List<T> methods; 35 private final Thread thread; 36 37 Task(List<T> methods) { 38 this.methods = methods; 39 this.thread = new Thread(this); 40 this.thread.start(); 41 } 42 43 boolean isAlive() { 44 return this.thread.isAlive(); 45 } 46 47 boolean isWorking() { 48 boolean working = this.working && this.thread.isAlive(); 49 this.working = false; 50 return working; 51 } 52 53 @Override 54 public void run() { 55 long time = -System.currentTimeMillis(); 56 for (T method : this.methods) { 57 this.working = true; 58 try { 59 for (int i = 0; i < 100; i++) { 60 process(method); 61 } 62 } catch (NoSuchMethodException ignore) { 63 } 64 } 65 time += System.currentTimeMillis(); 66 print("thread done in " + time / 1000 + " seconds"); 67 } 68 69 protected abstract void process(T method) throws NoSuchMethodException; 70 71 static synchronized void print(Object message) { 72 System.out.println(message); 73 System.out.flush(); 74 } 75 76 static List<Class<?>> getClasses(int count) throws Exception { 77 String resource = ClassLoader.getSystemClassLoader().getResource("java/lang/Object.class").toString(); 78 79 Pattern pattern = Pattern.compile("jar:file:(.*)!.*"); 80 Matcher matcher = pattern.matcher(resource); 81 matcher.matches(); 82 resource = matcher.group(1); 83 84 List<Class<?>> classes = new ArrayList<>(); 85 try (JarFile jarFile = new JarFile(resource)) { 86 Enumeration<JarEntry> entries = jarFile.entries(); 87 while (entries.hasMoreElements()) { 88 String name = entries.nextElement().getName(); 89 if (name.startsWith("java") && name.endsWith(".class")) { 90 classes.add(Class.forName(name.substring(0, name.indexOf(".")).replace('/', '.'))); 91 if (count == classes.size()) { 92 break; 93 } 94 } 95 } 96 } 97 return classes; 98 } 99 }