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 

    30 import jdk.jfr.Event;

    31 import jdk.jfr.consumer.RecordingStream;

    32 

    33 /**

    34  * @test

    35  * @summary Tests RecordingStream::startAsync()

    36  * @key jfr

    37  * @requires vm.hasJFR

    38  * @library /test/lib

    39  * @run main/othervm jdk.jfr.api.consumer.recordingstream.TestStartAsync

    40  */

    41 public class TestStartAsync {

    42     static class StartEvent extends Event {

    43     }

    44 

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

    46         testStart();

    47         testStartTwice();

    48         testStartClosed();

    49     }

    50 

    51     private static void testStartTwice() throws Exception {

    52         try (RecordingStream rs = new RecordingStream()) {

    53             rs.startAsync();

    54             try {

    55                 rs.startAsync();

    56                 throw new AssertionError("Expected IllegalStateException if started twice");

    57             } catch (IllegalStateException ise) {

    58                 // OK, as expected

    59             }

    60         }

    61     }

    62 

    63     static void testStart() throws Exception {

    64         CountDownLatch started = new CountDownLatch(1);

    65         try (RecordingStream rs = new RecordingStream()) {

    66             rs.onEvent(e -> {

    67                 started.countDown();

    68             });

    69             rs.startAsync();

    70             StartEvent e = new StartEvent();

    71             e.commit();

    72             started.await();

    73         }

    74     }

    75 

    76     static void testStartClosed() {

    77         RecordingStream rs = new RecordingStream();

    78         rs.close();

    79         try {

    80             rs.startAsync();

    81             throw new AssertionError("Expected IllegalStateException");

    82         } catch (IllegalStateException ise) {

    83             // OK, as expected.

    84         }

    85     }

    86 }