1 /*
   2  * Copyright (c) 2018, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.api.event;
  27 
  28 import java.time.Duration;
  29 import java.util.List;
  30 
  31 import jdk.jfr.Event;
  32 import jdk.jfr.Recording;
  33 import jdk.jfr.consumer.RecordedEvent;
  34 import jdk.test.lib.jfr.Events;
  35 
  36 /*
  37  * @test
  38  * @summary Enable an event from a static function in the event.
  39  * @key jfr
  40  * @library /test/lib
  41  * @run main/othervm jdk.jfr.api.event.TestStaticEnable
  42  */
  43 public class TestStaticEnable {
  44 
  45     public static void main(String[] args) throws Exception {
  46         Recording r = new Recording();
  47         MyEvent.enable(r, true);
  48         r.start();
  49         MyEvent.create("Hello", 1);
  50         r.stop();
  51 
  52         List<RecordedEvent> events = Events.fromRecording(r);
  53         Events.hasEvents(events);
  54         for (RecordedEvent event : events) {
  55             System.out.println("Event:" + event);
  56             Events.assertField(event, "msg").equal("Hello");
  57             Events.assertField(event, "id").equal(1L);
  58         }
  59         r.close();
  60     }
  61 
  62 
  63     public static class MyEvent extends Event {
  64         public String msg;
  65         long id;
  66 
  67         public static void enable(Recording r, boolean isEnabled) {
  68             if (isEnabled) {
  69                 r.enable(MyEvent.class).withThreshold(Duration.ofMillis(0)).withoutStackTrace();
  70             } else {
  71                 r.disable(MyEvent.class);
  72             }
  73         }
  74 
  75         public static void create(String msg, long id) {
  76             MyEvent event = new MyEvent();
  77             event.msg = msg;
  78             event.id = id;
  79             event.begin();
  80             event.end();
  81             event.commit();
  82         }
  83     }
  84 
  85 }