1 /* 2 * Copyright (c) 2015, 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.io.IOException; 25 import java.nio.file.Files; 26 import java.nio.file.Path; 27 28 /* @test 29 * @summary Test probing content type simultaneously from multiple threads. 30 * @requires (os.family == "linux") | (os.family == "solaris") 31 * @run main/othervm ParallelProbes 10 32 */ 33 public class ParallelProbes { 34 35 private int threads = 0; 36 private static final int REPEATS = 1000; 37 38 public ParallelProbes(int threads) { 39 this.threads = threads; 40 System.out.println("Using <" + threads + "> threads."); 41 } 42 43 public void start() throws IOException { 44 for (int i = 0; i < threads; i++) { 45 final Path p = createTmpFile(); 46 Runnable r = createRunnable(p); 47 new Thread(r, "thread-" + i).start(); 48 } 49 } 50 51 private Runnable createRunnable(final Path p) { 52 Runnable r = new Runnable() { 53 public void run() { 54 for (int i = 0; i < REPEATS; i++) { 55 try { 56 System.out.println(Thread.currentThread().getName() 57 + " -> " + Files.probeContentType(p)); 58 } catch (IOException ioException) { 59 ioException.printStackTrace(); 60 } 61 } 62 } 63 }; 64 return r; 65 } 66 67 private Path createTmpFile() throws IOException { 68 final Path p = Files.createTempFile("prefix", ".json"); 69 Files.write(p, "{\"test\"}".getBytes()); 70 System.out.println("Write test file <" + p + ">"); 71 return p; 72 } 73 74 public static void main(String[] args) throws Exception { 75 if (args != null && args.length != 1) { 76 new ParallelProbes(1).start(); 77 } else { 78 new ParallelProbes(Integer.parseInt(args[0])).start(); 79 } 80 } 81 }