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         log("Entering testCloseMySelf()");

    58         CountDownLatch l1 = new CountDownLatch(1);

    59         CountDownLatch l2 = new CountDownLatch(1);

    60         RecordingStream r = new RecordingStream();

    61         r.onEvent(e -> {

    62             try {

    63                 l1.await();

    64                 r.close();

    65                 l2.countDown();

    66             } catch (InterruptedException ie) {

    67                 throw new Error(ie);

    68             }

    69         });

    70         r.startAsync();

    71         CloseEvent c = new CloseEvent();

    72         c.commit();

    73         l1.countDown();

    74         l2.await();

    75         log("Leaving testCloseMySelf()");

    76     }

    77 

    78     private static void testCloseStreaming() throws Exception {

    79         log("Entering testCloseStreaming()");

    80         CountDownLatch streaming = new CountDownLatch(1);

    81         RecordingStream r = new RecordingStream();

    82         AtomicLong count = new AtomicLong();

    83         r.onEvent(e -> {

    84             if (count.incrementAndGet() > 100) {

    85                 streaming.countDown();

    86             }

    87         });

    88         r.startAsync();

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

    90             while (true) {

    91                 CloseEvent c = new CloseEvent();

    92                 c.commit();

    93             }

    94         });

    95         streaming.await();

    96         r.close();

    97         streamingLoop.cancel(true);

    98         log("Leaving testCloseStreaming()");

    99     }

   100 

   101     private static void testCloseStarted() {

   102         log("Entering testCloseStarted()");

   103         RecordingStream r = new RecordingStream();

   104         r.startAsync();

   105         r.close();

   106         log("Leaving testCloseStarted()");

   107     }

   108 

   109     private static void testCloseUnstarted() {

   110         log("Entering testCloseUnstarted()");

   111         RecordingStream r = new RecordingStream();

   112         r.close();

   113         log("Leaving testCloseUnstarted()");

   114     }

   115 

   116     private static void testCloseTwice() {

   117         log("Entering testCloseTwice()");

   118         RecordingStream r = new RecordingStream();

   119         r.startAsync();

   120         r.close();

   121         r.close();

   122         log("Leaving testCloseTwice()");

   123     }

   124 

   125     private static void log(String msg) {

   126         System.out.println(msg);

   127     }

   128 }