1 /*

     2  * Copyright (c) 2018, 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.recorder;

    27 

    28 import java.io.IOException;

    29 import java.nio.file.Files;

    30 import java.nio.file.LinkOption;

    31 import java.nio.file.Path;

    32 

    33 import jdk.jfr.Configuration;

    34 import jdk.jfr.Recording;

    35 

    36 /*

    37  * @test TestStartStopRecording

    38  *

    39  * @key jfr

    40  * @run main/othervm jdk.jfr.api.recorder.TestStartStopRecording

    41  */

    42 public class TestStartStopRecording {

    43 

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

    45         Configuration defaultConfig = Configuration.getConfiguration("default");

    46         // Memory

    47         Recording inMemory = new Recording(defaultConfig);

    48         inMemory.setToDisk(false);

    49 

    50         inMemory.start();

    51 

    52         Path memoryFile = Files.createTempFile("memory-recording", ".jfr");

    53         inMemory.dump(memoryFile);

    54         assertValid(memoryFile, "Not a valid memory file.");

    55         inMemory.stop();

    56         inMemory.close();

    57         // Disk

    58         Recording toDisk = new Recording(defaultConfig);

    59         toDisk.setToDisk(true);

    60 

    61         toDisk.start();

    62         toDisk.stop();

    63         Path diskFile = Files.createTempFile("disk-recording", ".jfr");

    64         toDisk.dump(diskFile);

    65         assertValid(diskFile, "Not a valid disk file.");

    66         toDisk.close();

    67     }

    68 

    69     private static void assertValid(Path path, String message) throws IOException {

    70         if (!Files.exists(path, LinkOption.NOFOLLOW_LINKS)) {

    71             throw new AssertionError(message + " Could not find file " + path);

    72         }

    73         if (Files.size(path) == 0) {

    74             throw new AssertionError(message + " File size = 0 for " + path);

    75         }

    76     }

    77 }