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.CompletableFuture;

    29 import java.util.concurrent.CountDownLatch;

    30 import java.util.concurrent.atomic.AtomicLong;

    31 

    32 import jdk.jfr.Event;

    33 import jdk.jfr.consumer.RecordingStream;

    34 

    35 /**

    36  * @test

    37  * @summary Tests RecordingStream::close()

    38  * @key jfr

    39  * @requires vm.hasJFR

    40  * @library /test/lib

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

    42  */

    43 public class TestClose {

    44 

    45     private static class CloseEvent extends Event {

    46     }

    47 

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

    49         testCloseUnstarted();

    50         testCloseStarted();

    51         testCloseTwice();

    52         testCloseStreaming();

    53         testCloseMySelf();

    54     }

    55 

    56     private static void testCloseMySelf() throws Exception {

    57         CountDownLatch l1 = new CountDownLatch(1);

    58         CountDownLatch l2 = new CountDownLatch(1);

    59         RecordingStream r = new RecordingStream();

    60         r.onEvent(e -> {

    61             try {

    62                 l1.await();

    63                 r.close();

    64                 l2.countDown();

    65             } catch (InterruptedException ie) {

    66                 throw new Error(ie);

    67             }

    68         });

    69         r.startAsync();

    70         CloseEvent c = new CloseEvent();

    71         c.commit();

    72         l1.countDown();

    73         l2.await();

    74     }

    75 

    76     private static void testCloseStreaming() throws Exception {

    77         CountDownLatch streaming = new CountDownLatch(1);

    78         RecordingStream r = new RecordingStream();

    79         AtomicLong count = new AtomicLong();

    80         r.onEvent(e -> {

    81             if (count.incrementAndGet() == 100) {

    82                 streaming.countDown();

    83             }

    84         });

    85         r.startAsync();

    86         var streamingLoop = CompletableFuture.runAsync(() -> {

    87             while (true) {

    88                 CloseEvent c = new CloseEvent();

    89                 c.commit();

    90             }

    91         });

    92         streaming.await();

    93         r.close();

    94         streamingLoop.cancel(true);

    95     }

    96 

    97     private static void testCloseStarted() {

    98         RecordingStream r = new RecordingStream();

    99         r.startAsync();

   100         r.close();

   101     }

   102 

   103     private static void testCloseUnstarted() {

   104         RecordingStream r = new RecordingStream();

   105         r.close();

   106     }

   107 

   108     private static void testCloseTwice() {

   109         RecordingStream r = new RecordingStream();

   110         r.startAsync();

   111         r.close();

   112         r.close();

   113     }

   114 

   115 }