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.recordingstream;

    27 

    28 import java.util.concurrent.CountDownLatch;

    29 import java.util.concurrent.atomic.AtomicBoolean;

    30 

    31 import jdk.jfr.Event;

    32 import jdk.jfr.consumer.RecordingStream;

    33 

    34 /**

    35  * @test

    36  * @summary Tests that events are not emitted in handlers

    37  * @key jfr

    38  * @requires vm.hasJFR

    39  * @library /test/lib

    40  * @run main/othervm jdk.jfr.api.consumer.recordingstream.TestRecursive

    41  */

    42 public class TestRecursive {

    43 

    44     static class NotRecorded extends Event {

    45     }

    46 

    47     static class Recorded extends Event {

    48     }

    49 

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

    51         CountDownLatch latchOne = new CountDownLatch(1);

    52         CountDownLatch latchTwo = new CountDownLatch(2);

    53         AtomicBoolean fail = new AtomicBoolean();

    54         try (RecordingStream r = new RecordingStream()) {

    55             r.onEvent(e -> {

    56                 System.out.println(e);

    57                 NotRecorded event = new NotRecorded();

    58                 event.commit();

    59                 if (e.getEventType().getName().equals(Recorded.class.getName())) {

    60                     latchOne.countDown();

    61                     latchTwo.countDown();

    62                 }

    63                 if (e.getEventType().getName().equals(NotRecorded.class.getName())) {

    64                     fail.set(true);

    65                 }

    66             });

    67             r.startAsync();

    68             Recorded e1 = new Recorded();

    69             e1.commit();

    70             latchOne.await();

    71             Recorded e2 = new Recorded();

    72             e2.commit();

    73             latchTwo.await();

    74             if (fail.get()) {

    75                 throw new Exception("Unexpected event found");

    76             }

    77         }

    78     }

    79 }