1 /*

     2  * Copyright (c) 2013, 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.internal.instrument;

    27 

    28 import java.io.IOException;

    29 

    30 import jdk.jfr.events.FileWriteEvent;

    31 

    32 /**

    33  * See {@link JITracer} for an explanation of this code.

    34  */

    35 @JIInstrumentationTarget("java.io.FileOutputStream")

    36 final class FileOutputStreamInstrumentor {

    37 

    38     private FileOutputStreamInstrumentor() {

    39     }

    40 

    41     private String path;

    42 

    43     @SuppressWarnings("deprecation")

    44     @JIInstrumentationMethod

    45     public void write(int b) throws IOException {

    46         FileWriteEvent event = FileWriteEvent.EVENT.get();

    47         if (!event.isEnabled()) {

    48             write(b);

    49             return;

    50         }

    51         try {

    52             event.begin();

    53             write(b);

    54             event.bytesWritten = 1;

    55         } finally {

    56             event.path = path;

    57             event.commit();

    58             event.reset();

    59         }

    60     }

    61 

    62     @SuppressWarnings("deprecation")

    63     @JIInstrumentationMethod

    64     public void write(byte b[]) throws IOException {

    65         FileWriteEvent event = FileWriteEvent.EVENT.get();

    66         if (!event.isEnabled()) {

    67             write(b);

    68             return;

    69         }

    70         try {

    71             event.begin();

    72             write(b);

    73             event.bytesWritten = b.length;

    74         } finally {

    75             event.path = path;

    76             event.commit();

    77             event.reset();

    78         }

    79     }

    80 

    81     @SuppressWarnings("deprecation")

    82     @JIInstrumentationMethod

    83     public void write(byte b[], int off, int len) throws IOException {

    84         FileWriteEvent event = FileWriteEvent.EVENT.get();

    85         if (!event.isEnabled()) {

    86             write(b, off, len);

    87             return;

    88         }

    89         try {

    90             event.begin();

    91             write(b, off, len);

    92             event.bytesWritten = len;

    93         } finally {

    94             event.path = path;

    95             event.commit();

    96             event.reset();

    97         }

    98     }

    99 }