1 /*
   2  * Copyright (c) 2012, 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 sun.misc;
  27 
  28 import java.net.InetAddress;
  29 
  30 /**
  31  * Utility class that can be used to trace I/O calls.
  32  */
  33 public final class IoTrace {
  34     private IoTrace() { }
  35 
  36     private static IoTraceListener listener = null;
  37 
  38     public static void setListener(IoTraceListener l) {
  39         listener = l;
  40     }
  41 
  42     // Socket Read
  43     public static Object socketReadBegin(InetAddress address, int port, int timeout) {
  44         IoTraceListener l = listener;
  45         if (l != null) {
  46             return l.socketReadBegin(address, port, timeout);
  47         }
  48         return null;
  49     }
  50     public static void socketReadEnd(Object handle, long bytesRead) {
  51         IoTraceListener l = listener;
  52         if (l != null) {
  53             l.socketReadEnd(handle, bytesRead);
  54         }
  55     }
  56 
  57     // Socket Write
  58     public static Object socketWriteBegin(InetAddress address, int port) {
  59         IoTraceListener l = listener;
  60         if (l != null) {
  61             return l.socketWriteBegin(address, port);
  62         }
  63         return null;
  64     }
  65     public static void socketWriteEnd(Object handle, long bytesRead) {
  66         IoTraceListener l = listener;
  67         if (l != null) {
  68             l.socketWriteEnd(handle, bytesRead);
  69         }
  70     }
  71 
  72     // File Read
  73     public static Object fileReadBegin(String path) {
  74         IoTraceListener l = listener;
  75         if (l != null) {
  76             return l.fileReadBegin(path);
  77         }
  78         return null;
  79     }
  80     public static void fileReadEnd(Object handle, long bytesRead) {
  81         IoTraceListener l = listener;
  82         if (l != null) {
  83             l.fileReadEnd(handle, bytesRead);
  84         }
  85     }
  86 
  87     // File Write
  88     public static Object fileWriteBegin(String path) {
  89         IoTraceListener l = listener;
  90         if (l != null) {
  91             return l.fileWriteBegin(path);
  92         }
  93         return null;
  94     }
  95     public static void fileWriteEnd(Object handle, long bytesWritten) {
  96         IoTraceListener l = listener;
  97         if (l != null) {
  98             l.fileWriteEnd(handle, bytesWritten);
  99         }
 100     }
 101 }