1 /* 2 * Copyright (c) 2019, 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.nio.file.Files; 25 import java.nio.file.Path; 26 import java.nio.file.Paths; 27 import jdk.jfr.Event; 28 import jdk.jfr.Description; 29 import jdk.jfr.Label; 30 31 32 // This class generates simple event in a loop for a specified time. 33 public class EventGeneratorLoop { 34 35 @Label("SimpleEvent") 36 @Description("Simple custom event") 37 static class SimpleEvent extends Event { 38 @Label("Message") 39 String msg; 40 41 @Label("Count") 42 int count; 43 } 44 45 46 // Arguments: 47 // - time to run (in seconds) - mandatory 48 // - full file path to signal the start of main - optional 49 public static void main(String[] args) throws Exception { 50 if ((args.length < 1) || (args[0] == null)) { 51 throw new IllegalArgumentException("Expecting one argument: time to run (seconds)"); 52 } 53 int howLong = Integer.parseInt(args[0]); 54 55 if ((args.length > 1) && (args[1] != null)) { 56 signalStartOfMain(args[1]); 57 } 58 59 for (int i=0; i < howLong; i++) { 60 SimpleEvent ev = new SimpleEvent(); 61 ev.msg = "Hello"; 62 ev.count = i; 63 ev.commit(); 64 65 try { Thread.sleep(1000); } catch (InterruptedException e) {} 66 System.out.print("."); 67 } 68 } 69 70 private static void signalStartOfMain(String fileName) throws Exception { 71 Path p = Paths.get(fileName); 72 Files.createFile(p); 73 p.toFile().deleteOnExit(); 74 } 75 }