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 }