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.io.IOException;
  29 import java.time.Duration;
  30 import java.time.Instant;
  31 import java.util.List;
  32 
  33 import jdk.jfr.FlightRecorder;
  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 import jdk.test.lib.jfr.SimpleEvent;
  39 
  40 /*
  41  * @test
  42  * @summary Test periodic setting that involves chunks.
  43  * @key jfr
  44  * @library /test/lib
  45  * @run main/othervm jdk.jfr.api.recording.event.TestChunkPeriod
  46  */
  47 public class TestChunkPeriod {
  48 
  49     // Margin of error is to avoid issues where JFR and
  50     // System.currentMillis take the clock differently
  51     private static final Duration MARGIN_OF_ERROR = Duration.ofNanos(1_000_000_000); // 1 s
  52 
  53     public static void main(String[] args) throws Throwable {
  54         FlightRecorder.addPeriodicEvent(SimpleEvent.class, () -> {
  55             SimpleEvent  pe = new SimpleEvent();
  56             pe.commit();
  57         });
  58         testBeginChunk();
  59         testEndChunk();
  60         testEveryChunk();
  61     }
  62 
  63     private static void testBeginChunk() throws IOException {
  64         Recording r = new Recording();
  65         r.enable(SimpleEvent.class).with("period", "beginChunk");
  66         Instant beforeStart = Instant.now().minus(MARGIN_OF_ERROR);
  67         r.start();
  68         Instant afterStart = Instant.now().plus(MARGIN_OF_ERROR);
  69         r.stop();
  70         List<RecordedEvent> events = Events.fromRecording(r);
  71         Asserts.assertEquals(events.size(), 1, "Expected one event with beginChunk");
  72         RecordedEvent event = events.get(0);
  73         Asserts.assertGreaterThanOrEqual(event.getStartTime(), beforeStart);
  74         Asserts.assertGreaterThanOrEqual(afterStart, event.getStartTime());
  75         r.close();
  76     }
  77 
  78     private static void testEndChunk() throws IOException {
  79         Recording r = new Recording();
  80         r.enable(SimpleEvent.class).with("period", "endChunk");
  81         r.start();
  82         Instant beforeStop = Instant.now().minus(MARGIN_OF_ERROR);
  83         r.stop();
  84         Instant afterStop =  Instant.now().plus(MARGIN_OF_ERROR);
  85         List<RecordedEvent> events = Events.fromRecording(r);
  86         Asserts.assertEquals(events.size(), 1, "Expected one event with endChunk");
  87         RecordedEvent event = events.get(0);
  88         Asserts.assertGreaterThanOrEqual(event.getStartTime(), beforeStop);
  89         Asserts.assertGreaterThanOrEqual(afterStop, event.getStartTime());
  90         r.close();
  91     }
  92 
  93     private static void testEveryChunk() throws IOException {
  94         Recording r = new Recording();
  95         r.enable(SimpleEvent.class).with("period", "everyChunk");
  96         r.start();
  97         r.stop();
  98         List<RecordedEvent> events = Events.fromRecording(r);
  99         Asserts.assertEquals(events.size(), 2, "Expected two events with everyChunk");
 100         r.close();
 101     }
 102 }