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.streaming;

    27 

    28 import java.util.Random;

    29 

    30 import jdk.jfr.Event;

    31 import jdk.jfr.consumer.RecordingStream;

    32 

    33 /**

    34  * @test

    35  * @summary Test that it is possible to iterate over chunk with normal events

    36  * @key jfr

    37  * @requires vm.hasJFR

    38  * @library /test/lib

    39  * @run main/othervm jdk.jfr.api.consumer.streaming.TestFilledChunks

    40  */

    41 public class TestFilledChunks {

    42 

    43     static class FillEvent extends Event {

    44         String message;

    45         int value;

    46         int id;

    47     }

    48 

    49     static class EndEvent extends Event {

    50     }

    51 

    52     // Will generate about 100 MB of data, or 8-9 chunks

    53     private static final int EVENT_COUNT = 5_000_000;

    54 

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

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

    57             rs.onEvent(FillEvent.class.getName(), e -> {

    58                 int id = e.getInt("id");

    59                 // Some events may get lost due to

    60                 // buffer being full.

    61                 if (id > EVENT_COUNT / 2) {

    62                     rs.close();

    63                 }

    64             });

    65             rs.startAsync();

    66             long seed = System.currentTimeMillis();

    67             System.out.println("Random seed: " + seed);

    68             Random r = new Random(seed);

    69             for (int i = 1; i < EVENT_COUNT; i++) {

    70                 FillEvent f = new FillEvent();

    71                 f.message = i % 2 == 0 ? "hello, hello, hello, hello, hello!" : "hi!";

    72                 f.value = r.nextInt(10000);

    73                 f.id = i;

    74                 f.commit();

    75                 if (i % 1_000_000 == 0) {

    76                     System.out.println("Emitted " + i + " events");

    77                 }

    78             }

    79             rs.awaitTermination();

    80         }

    81     }

    82 }