1 /*
   2  * Copyright (c) 2018, 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.  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.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.testlibrary.Asserts;
  35 import jdk.testlibrary.jfr.Events;
  36 
  37 /*
  38  * @test
  39  * @summary Test event threshold.
  40  * @key jfr
  41  * @library /lib/testlibrary
  42  * @run main/othervm jdk.jfr.api.recording.event.TestThreshold
  43  */
  44 public class TestThreshold {
  45 
  46     public static void main(String[] args) throws Throwable {
  47         Recording r = new Recording();
  48 
  49         r.start();
  50         r.enable(MyEvent.class).withThreshold(Duration.ofMillis(500));
  51         createEvent(0, 100);
  52         createEvent(1, 600);
  53         createEvent(2, 100);
  54         r.stop();
  55 
  56         List<RecordedEvent> events = Events.fromRecording(r);
  57         Asserts.assertTrue(1 <= events.size(), "Should get at most 1 event");
  58         r.close();
  59     }
  60 
  61     private static void createEvent(int id, long duration) throws Exception {
  62         MyEvent event = new MyEvent(id);
  63         long start = System.currentTimeMillis();
  64 
  65         event.begin();
  66         sleepUntil(start + duration);
  67         event.end();
  68 
  69         long actualDuration = System.currentTimeMillis() - start;
  70         System.out.printf("targetDuration=%d, actualDuration=%d, shouldCommit=%b%n",
  71         duration, actualDuration, event.shouldCommit());
  72         event.commit();
  73     }
  74 
  75     private static void sleepUntil(long endTime) throws Exception {
  76         long sleepTime = endTime - System.currentTimeMillis();
  77         while(sleepTime > 0) {
  78             Thread.sleep(sleepTime);
  79             sleepTime = endTime - System.currentTimeMillis();
  80         }
  81     }
  82 
  83     static class MyEvent extends Event {
  84         public int id;
  85         public MyEvent(int id) {
  86             this.id = id;
  87         }
  88     }
  89 
  90 }