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.recording.event;
  27 
  28 import java.lang.reflect.Constructor;
  29 import java.time.Duration;
  30 import java.util.ArrayList;
  31 import java.util.List;
  32 
  33 import jdk.jfr.Event;
  34 import jdk.jfr.Recording;
  35 import jdk.jfr.consumer.RecordedEvent;
  36 import jdk.test.lib.Asserts;
  37 import jdk.test.lib.jfr.Events;
  38 
  39 /*
  40  * @test
  41  * @summary Load event class after recording started.
  42  * @key jfr
  43  * @library /test/lib
  44  * @build jdk.test.lib.jfr.SimpleEvent
  45  * @run main/othervm jdk.jfr.api.recording.event.TestLoadEventAfterStart
  46  */
  47 public class TestLoadEventAfterStart {
  48 
  49     public static void main(String[] args) throws Throwable {
  50         Recording r = new Recording();
  51         r.start();
  52 
  53         ClassLoader classLoader = TestLoadEventAfterStart.class.getClassLoader();
  54         Class<? extends Event> eventClass =
  55             classLoader.loadClass("jdk.test.lib.jfr.SimpleEvent").asSubclass(Event.class);
  56 
  57         r.enable(eventClass).withThreshold(Duration.ofMillis(0)).withoutStackTrace();
  58         createEvent(eventClass, 1);
  59         r.disable(eventClass);
  60         createEvent(eventClass, 2);
  61         r.enable(eventClass).withThreshold(Duration.ofMillis(0)).withoutStackTrace();
  62         createEvent(eventClass, 3);
  63 
  64         r.stop();
  65         verifyEvents(r, 1, 3);
  66     }
  67 
  68     private static void verifyEvents(Recording r, int ... ids) throws Exception {
  69         List<Integer> eventIds = new ArrayList<>();
  70         for (RecordedEvent event : Events.fromRecording(r)) {
  71             int id = Events.assertField(event, "id").getValue();
  72             System.out.println("Event id:" + id);
  73             eventIds.add(id);
  74         }
  75         Asserts.assertEquals(eventIds.size(), ids.length, "Wrong number of events");
  76         for (int i = 0; i < ids.length; ++i) {
  77             Asserts.assertEquals(eventIds.get(i).intValue(), ids[i], "Wrong id in event");
  78         }
  79     }
  80 
  81     private static void createEvent(Class<? extends Event> eventClass, int id) throws Exception {
  82         Constructor<? extends Event> constructor = eventClass.getConstructor();
  83         Event event = (Event) constructor.newInstance();
  84         event.begin();
  85         eventClass.getDeclaredField("id").setInt(event, id);
  86         event.end();
  87         event.commit();
  88     }
  89 }