1 /* 2 * Copyright (c) 2012, 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 /* @test 25 * @bug 8005281 26 * @summary Test that the Properties storeToXML and loadFromXML methods are 27 * thread safe 28 */ 29 30 import java.io.*; 31 import java.util.Properties; 32 import java.util.Random; 33 import java.util.concurrent.Callable; 34 import java.util.concurrent.Executors; 35 import java.util.concurrent.ExecutorService; 36 import java.util.concurrent.Future; 37 38 public class ConcurrentLoadAndStoreXML { 39 40 static final Random RAND = new Random(); 41 42 static volatile boolean done; 43 44 /** 45 * Simple task that bashes on storeToXML and loadFromXML until the "done" 46 * flag is set. 47 */ 48 static class Basher implements Callable<Void> { 49 final Properties props; 50 51 Basher(Properties props) { 52 this.props = props; 53 } 54 55 public Void call() throws IOException { 56 while (!done) { 57 58 // store as XML format 59 ByteArrayOutputStream out = new ByteArrayOutputStream(); 60 props.storeToXML(out, null, "UTF-8"); 61 62 // load from XML format 63 Properties p = new Properties(); 64 ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray()); 65 p.loadFromXML(in); 66 67 // check that the properties are as expected 68 if (!p.equals(props)) 69 throw new RuntimeException("Properties not equal"); 70 } 71 return null; 72 } 73 } 74 75 public static void main(String[] args) throws Exception { 76 final int NTASKS = 4 + RAND.nextInt(4); 77 78 // create Bashers with Properties of random keys and values 79 Basher[] basher = new Basher[NTASKS]; 80 for (int i=0; i<NTASKS; i++) { 81 Properties props = new Properties(); 82 for (int j=0; j<RAND.nextInt(100); j++) { 83 String key = "k" + RAND.nextInt(1000); 84 String value = "v" + RAND.nextInt(1000); 85 props.put(key, value); 86 } 87 basher[i] = new Basher(props); 88 } 89 90 ExecutorService pool = Executors.newFixedThreadPool(NTASKS); 91 try { 92 // kick off the bashers 93 Future<Void>[] task = new Future[NTASKS]; 94 for (int i=0; i<NTASKS; i++) { 95 task[i] = pool.submit(basher[i]); 96 } 97 98 // give them time to interfere with each each 99 Thread.sleep(2000); 100 done = true; 101 102 // check the result 103 for (int i=0; i<NTASKS; i++) { 104 task[i].get(); 105 } 106 } finally { 107 done = true; 108 pool.shutdown(); 109 } 110 111 } 112 }