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 import jdk.jfr.Event; 24 import jdk.jfr.Description; 25 import jdk.jfr.Label; 26 27 28 // This class generates simple event in a loop 29 // for a specified time. 30 // Pass the time in seconds as a parameter. 31 public class EventGeneratorLoop { 32 33 @Label("SimpleEvent") 34 @Description("Simple custom event") 35 static class SimpleEvent extends Event { 36 @Label("Message") 37 String msg; 38 39 @Label("Count") 40 int count; 41 } 42 43 44 public static void main(String[] args) throws Exception { 45 if ((args.length < 1) || (args[0] == null)) { 46 throw new IllegalArgumentException("Expecting one argument: time to run (seconds)"); 47 } 48 int howLong = Integer.parseInt(args[0]); 49 50 for (int i=0; i < howLong; i++) { 51 SimpleEvent ev = new SimpleEvent(); 52 ev.msg = "Hello"; 53 ev.count = i; 54 ev.commit(); 55 56 try { Thread.sleep(1000); } catch (InterruptedException e) {} 57 System.out.print("."); 58 } 59 } 60 }