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 }