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 package jdk.jfr.api.consumer.recordingstream;

    26 

    27 import java.util.concurrent.CountDownLatch;

    28 

    29 import jdk.jfr.Event;

    30 import jdk.jfr.Name;

    31 import jdk.jfr.consumer.RecordingStream;

    32 

    33 /**

    34  * @test

    35  * @summary Tests RecordingStream::onEvent(...)

    36  * @key jfr

    37  * @requires vm.hasJFR

    38  * @library /test/lib

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

    40  */

    41 public class TestOnEvent {

    42 

    43     @Name("A")

    44     static class EventA extends Event {

    45     }

    46 

    47     @Name("A")

    48     static class EventAlsoA extends Event {

    49     }

    50 

    51     @Name("C")

    52     static class EventC extends Event {

    53     }

    54 

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

    56         testOnEventNull();

    57         testOnEvent();

    58         testNamedEvent();

    59         testTwoEventWithSameName();

    60     }

    61 

    62     private static void testOnEventNull() {

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

    64            try {

    65                rs.onEvent(null);

    66                throw new AssertionError("Expected NullPointerException from onEvent(null)");

    67            } catch (NullPointerException npe) {

    68                // OK; as expected

    69            }

    70            try {

    71                rs.onEvent("A", null);

    72                throw new AssertionError("Expected NullPointerException from onEvent(\"A\", null)");

    73 

    74            } catch (NullPointerException npe) {

    75                // OK; as expected

    76            }

    77            try {

    78                String s = null;

    79                rs.onEvent(s, null);

    80                throw new AssertionError("Expected NullPointerException from onEvent(null, null)");

    81            } catch (NullPointerException npe) {

    82                // OK; as expected

    83            }

    84         }

    85      }

    86 

    87     private static void testTwoEventWithSameName() throws Exception {

    88         CountDownLatch eventA = new CountDownLatch(2);

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

    90             r.onEvent("A", e -> {

    91                 System.out.println("testTwoEventWithSameName" +  e);

    92                 eventA.countDown();

    93             });

    94             r.startAsync();

    95             EventA a1 = new EventA();

    96             a1.commit();

    97             EventAlsoA a2 = new EventAlsoA();

    98             a2.commit();

    99             eventA.await();

   100         }

   101     }

   102 

   103     private static void testNamedEvent() throws Exception {

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

   105             CountDownLatch eventA = new CountDownLatch(1);

   106             CountDownLatch eventC = new CountDownLatch(1);

   107             r.onEvent("A", e -> {

   108                 System.out.println("TestNamedEvent:" + e);

   109                 if (e.getEventType().getName().equals("A")) {

   110                     eventA.countDown();

   111                 }

   112             });

   113             r.onEvent("C", e -> {

   114                 System.out.println("TestNamedEvent:" + e);

   115                 if (e.getEventType().getName().equals("C")) {

   116                     eventC.countDown();

   117                 }

   118             });

   119 

   120             r.startAsync();

   121             EventA a = new EventA();

   122             a.commit();

   123             EventC c = new EventC();

   124             c.commit();

   125             eventA.await();

   126             eventC.await();

   127         }

   128     }

   129 

   130     private static void testOnEvent() throws Exception {

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

   132             CountDownLatch event = new CountDownLatch(1);

   133             r.onEvent(e -> {

   134                 event.countDown();

   135             });

   136             r.startAsync();

   137             EventA a = new EventA();

   138             a.commit();

   139             event.await();

   140         }

   141     }

   142 }