1 /*

     2  * Copyright (c) 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.consumer.streaming;

    27 

    28 import java.util.concurrent.CountDownLatch;

    29 

    30 import jdk.jfr.Event;

    31 import jdk.jfr.FlightRecorder;

    32 import jdk.jfr.Period;

    33 import jdk.jfr.consumer.RecordingStream;

    34 

    35 /**

    36  * @test

    37  * @summary Verifies that it is possible to stream contents of ongoing

    38  *          recordings

    39  * @key jfr

    40  * @requires vm.hasJFR

    41  * @library /test/lib

    42  * @run main/othervm -Xlog:jfr+system+streaming=trace

    43  *      jdk.jfr.api.consumer.streaming.TestStartSingleChunk

    44  */

    45 public class TestStartSingleChunk {

    46 

    47     @Period("500 ms")

    48     static class ElkEvent extends Event {

    49     }

    50 

    51     static class FrogEvent extends Event {

    52     }

    53 

    54     static class LionEvent extends Event {

    55     }

    56 

    57     public static void main(String... args) throws Exception {

    58         CountDownLatch frogLatch = new CountDownLatch(1);

    59         CountDownLatch lionLatch = new CountDownLatch(1);

    60         CountDownLatch elkLatch = new CountDownLatch(3);

    61 

    62         FlightRecorder.addPeriodicEvent(ElkEvent.class, () -> {

    63             ElkEvent ee = new ElkEvent();

    64             ee.commit();

    65         });

    66         try (RecordingStream s = new RecordingStream()) {

    67             s.onEvent(ElkEvent.class.getName(), e -> {

    68                 System.out.println("Found elk!");

    69                 elkLatch.countDown();

    70             });

    71             s.onEvent(LionEvent.class.getName(), e -> {

    72                 System.out.println("Found lion!");

    73                 lionLatch.countDown();

    74             });

    75             s.onEvent(FrogEvent.class.getName(), e -> {

    76                 System.out.println("Found frog!");

    77                 frogLatch.countDown();

    78             });

    79             s.startAsync();

    80             FrogEvent fe = new FrogEvent();

    81             fe.commit();

    82 

    83             LionEvent le = new LionEvent();

    84             le.commit();

    85 

    86             frogLatch.await();

    87             lionLatch.await();

    88             elkLatch.await();

    89         }

    90     }

    91 }