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.function.Consumer;

    30 

    31 import jdk.jfr.Enabled;

    32 import jdk.jfr.Event;

    33 import jdk.jfr.consumer.RecordingStream;

    34 

    35 /**

    36  * @test

    37  * @summary Tests RecordingStream::enable(...)

    38  * @key jfr

    39  * @requires vm.hasJFR

    40  * @library /test/lib

    41  * @run main/othervm jdk.jfr.api.consumer.recordingstream.TestEnable

    42  */

    43 public class TestEnable {

    44 

    45     @Enabled(false)

    46     private static class EnabledEvent extends Event {

    47     }

    48 

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

    50         testEnableWithClass();

    51         testEnableWithEventName();

    52     }

    53 

    54     private static void testEnableWithEventName() {

    55         test(r -> r.enable(EnabledEvent.class.getName()));

    56     }

    57 

    58     private static void testEnableWithClass() {

    59         test(r -> r.enable(EnabledEvent.class));

    60     }

    61 

    62     private static void test(Consumer<RecordingStream> enablement) {

    63         CountDownLatch event = new CountDownLatch(1);

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

    65             r.onEvent(e -> {

    66                 event.countDown();

    67             });

    68             enablement.accept(r);

    69             r.startAsync();

    70             EnabledEvent e = new EnabledEvent();

    71             e.commit();

    72             try {

    73                 event.await();

    74             } catch (InterruptedException ie) {

    75                 throw new RuntimeException("Unexpected interruption of latch", ie);

    76             }

    77         }

    78     }

    79 }