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.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.Asserts;
  35 import jdk.test.lib.jfr.Events;
  36 
  37 /**
  38  * @test
  39  * @summary Test event threshold.
  40  * @key jfr
  41  *
  42  * @library /lib /
  43  * @run main/othervm jdk.jfr.api.recording.event.TestThreshold
  44  */
  45 public class TestThreshold {
  46 
  47     public static void main(String[] args) throws Throwable {
  48         Recording r = new Recording();
  49 
  50         r.start();
  51         r.enable(MyEvent.class).withThreshold(Duration.ofMillis(500));
  52         createEvent(0, 100);
  53         createEvent(1, 600);
  54         createEvent(2, 100);
  55         r.stop();
  56 
  57         List<RecordedEvent> events = Events.fromRecording(r);
  58         Asserts.assertTrue(1 <= events.size(), "Should get at most 1 event");
  59         r.close();
  60     }
  61 
  62     private static void createEvent(int id, long duration) throws Exception {
  63         MyEvent event = new MyEvent(id);
  64         long start = System.currentTimeMillis();
  65 
  66         event.begin();
  67         sleepUntil(start + duration);
  68         event.end();
  69 
  70         long actualDuration = System.currentTimeMillis() - start;
  71         System.out.printf("targetDuration=%d, actualDuration=%d, shouldCommit=%b%n",
  72         duration, actualDuration, event.shouldCommit());
  73         event.commit();
  74     }
  75 
  76     private static void sleepUntil(long endTime) throws Exception {
  77         long sleepTime = endTime - System.currentTimeMillis();
  78         while(sleepTime > 0) {
  79             Thread.sleep(sleepTime);
  80             sleepTime = endTime - System.currentTimeMillis();
  81         }
  82     }
  83 
  84     static class MyEvent extends Event {
  85         public int id;
  86         public MyEvent(int id) {
  87             this.id = id;
  88         }
  89     }
  90 
  91 }