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.nio.file.Path;

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

    30 

    31 import jdk.jfr.Event;

    32 import jdk.jfr.consumer.EventStream;

    33 

    34 /**

    35  * @test

    36  * @summary Verifies that it is possible to stream contents from a file

    37  * @key jfr

    38  * @requires vm.hasJFR

    39  * @library /test/lib

    40  * @run main/othervm jdk.jfr.api.consumer.streaming.TestFromFile

    41  */

    42 public class TestFromFile {

    43 

    44     static class SnakeEvent extends Event {

    45         int id;

    46     }

    47 

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

    49 //        Path path = Paths.get("./using-file.jfr");

    50 //        try (Recording r1 = new Recording()) {

    51 //            r1.start();

    52 //            emitSnakeEvent(1);

    53 //            emitSnakeEvent(2);

    54 //            emitSnakeEvent(3);

    55 //            // Force a chunk rotation

    56 //            try (Recording r2 = new Recording()) {

    57 //                r2.start();

    58 //                emitSnakeEvent(4);

    59 //                emitSnakeEvent(5);

    60 //                emitSnakeEvent(6);

    61 //                r2.stop();

    62 //            }

    63 //            r1.stop();

    64 //            r1.dump(path);

    65 //

    66 //            testIterator(path);

    67 //            testConsumer(path);

    68 //        }

    69     }

    70 

    71     static void testConsumer(Path path) throws Exception {

    72         AtomicLong counter = new AtomicLong();

    73         try (EventStream es = EventStream.openFile(path)) {

    74             es.onEvent(e -> {

    75                 counter.incrementAndGet();

    76             });

    77             es.startAsync();

    78             if (counter.get() != 6) {

    79                 throw new Exception("Expected 6 event, but got " + counter.get());

    80             }

    81             es.awaitTermination();

    82         }

    83     }

    84 

    85     static void emitSnakeEvent(int id) {

    86         SnakeEvent e = new SnakeEvent();

    87         e.id = id;

    88         e.commit();

    89     }

    90 

    91 }