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.event.io;

    27 

    28 import static jdk.test.lib.Asserts.assertEquals;

    29 import static jdk.test.lib.Asserts.assertNotEquals;

    30 

    31 import java.io.File;

    32 import java.io.FileInputStream;

    33 import java.io.FileOutputStream;

    34 import java.io.RandomAccessFile;

    35 import java.nio.ByteBuffer;

    36 import java.nio.channels.FileChannel;

    37 

    38 import jdk.jfr.Recording;

    39 import jdk.jfr.consumer.RecordedEvent;

    40 import jdk.test.lib.jfr.Events;

    41 

    42 /*

    43  * @test

    44  * @summary Test with FlightRecorder enabled but with the events disabled.

    45  * @key jfr

    46  * @library /test/lib /test/jdk

    47  * @run main/othervm jdk.jfr.event.io.TestDisabledEvents

    48  */

    49 

    50 // Verify that IO operations are correct and that no events are generated.

    51 public class TestDisabledEvents {

    52 

    53     private static final int writeInt = 'A';

    54     private static final byte[] writeBuf = { 'B', 'C', 'D' };

    55 

    56     public static void main(String[] args) throws Throwable {

    57         File tmp = File.createTempFile("TestDisabledEvents", ".tmp", new File("."));

    58         tmp.deleteOnExit();

    59         Recording recording = new Recording();

    60         recording.disable(IOEvent.EVENT_FILE_READ);

    61         recording.disable(IOEvent.EVENT_FILE_WRITE);

    62         recording.start();

    63 

    64         useRandomAccessFile(tmp);

    65         useFileStreams(tmp);

    66         useFileChannel(tmp);

    67 

    68         recording.stop();

    69         for (RecordedEvent event : Events.fromRecording(recording)) {

    70             final String eventName = event.getEventType().getName();

    71             System.out.println("Got eventName:" + eventName);

    72             assertNotEquals(eventName, IOEvent.EVENT_FILE_READ, "Got disabled read event");

    73             assertNotEquals(eventName, IOEvent.EVENT_FILE_WRITE, "Got disabled write event");

    74         }

    75     }

    76 

    77     private static void useRandomAccessFile(File tmp) throws Throwable {

    78         tmp.delete();

    79         try (RandomAccessFile ras = new RandomAccessFile(tmp, "rw")) {

    80             ras.write(writeInt);

    81             ras.write(writeBuf);

    82             ras.seek(0);

    83             int readInt = ras.read();

    84             assertEquals(readInt, writeInt, "Wrong readInt");

    85             byte[] readBuf = new byte[writeBuf.length];

    86             int readSize = ras.read(readBuf);

    87             assertEquals(readSize, writeBuf.length, "Wrong readSize");

    88             // Try to read more which should generate EOF.

    89             readInt = ras.read();

    90             assertEquals(readInt, -1, "Wrong readInt after EOF");

    91         }

    92     }

    93 

    94     private static void useFileStreams(File tmp) throws Throwable {

    95         tmp.delete();

    96         try (FileOutputStream fos = new FileOutputStream(tmp)) {

    97             fos.write(writeInt);

    98             fos.write(writeBuf);

    99         }

   100 

   101         try (FileInputStream fis = new FileInputStream(tmp)) {

   102             int readInt = fis.read();

   103             assertEquals(readInt, writeInt, "Wrong readInt");

   104             byte[] readBuf = new byte[writeBuf.length];

   105             int readSize = fis.read(readBuf);

   106             assertEquals(readSize, writeBuf.length, "Wrong readSize");

   107             // Try to read more which should generate EOF.

   108             readInt = fis.read();

   109             assertEquals(readInt, -1, "Wrong readInt after EOF");

   110         }

   111     }

   112 

   113     private static void useFileChannel(File tmp) throws Throwable {

   114         tmp.delete();

   115         try (RandomAccessFile rf = new RandomAccessFile(tmp, "rw");

   116                 FileChannel ch = rf.getChannel()) {

   117             final String bufContent = "0123456789";

   118             final int bufSize = bufContent.length();

   119             ByteBuffer writeBuf = ByteBuffer.allocateDirect(bufSize);

   120             writeBuf.put(bufContent.getBytes());

   121 

   122             writeBuf.flip();

   123             int writeSize = ch.write(writeBuf);

   124             assertEquals(writeSize, bufSize, "Wrong writeSize for FileChannel");

   125 

   126             ch.position(0);

   127             ByteBuffer readBuf = ByteBuffer.allocateDirect(bufSize);

   128             int readSize = ch.read(readBuf);

   129             assertEquals(readSize, bufSize, "Wrong readSize full for FileChannel");

   130             assertEquals(0, writeBuf.compareTo(readBuf), "Unexpected readBuf content");

   131         }

   132     }

   133 }