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comparison src/org/prevayler/implementation/ByteCountStream.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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-1:000000000000 0:3dc0c5604566
1 /*
2 The copyright of all source code included in this Prevayler distribution is
3 held by Klaus Wuestefeld, except the files that specifically state otherwise.
4 All rights are reserved. "PREVAYLER" is a trademark of Klaus Wuestefeld.
5
6
7 BSD License:
8
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are met:
11
12 - Redistributions of source code must retain the above copyright notice, this
13 list of conditions and the following disclaimer.
14
15 - Redistributions in binary form must reproduce the above copyright notice,
16 this list of conditions and the following disclaimer in the documentation
17 and/or other materials provided with the distribution.
18
19 - Neither the name of Prevayler nor the names of its contributors may be used
20 to endorse or promote products derived from this software without specific
21 prior written permission.
22
23
24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 package org.prevayler.implementation;
38
39 import java.io.*;
40
41 /** A FileOutputStream that counts the number of bytes written and forces all buffers to synchronize with the underlying device when flushed.
42 */
43 final class ByteCountStream extends FileOutputStream {
44
45 public ByteCountStream(File file) throws IOException {
46 super(file);
47 }
48
49 public void flush() throws IOException {
50 /*
51 "The flush method of OutputStream does nothing." - JDK1.3 API
52 documentation. I'm calling it just in case it starts doing something
53 in a future version of FileOutputStream or OutputStream.
54 */
55 super.flush();
56
57 /*
58 As we're JDK 1.4, this saves a bit of time because we don't bother
59 flushing meta data (we only care about flushing content)
60 */
61 getChannel().force(false);
62
63 // Original
64 // getFD().sync(); //"Force all system buffers to synchronize with the underlying device." - JDK1.3 API documentation.
65 }
66
67 public void write(byte[] b) throws IOException {
68 super.write(b);
69 bytesWritten += b.length;
70 }
71
72 public void write(byte[] b, int off, int len) throws IOException {
73 super.write(b, off, len);
74 bytesWritten += len;
75 }
76
77 public void write(int b) throws IOException {
78 super.write(b);
79 ++bytesWritten;
80 }
81
82 public long bytesWritten() {
83 return bytesWritten;
84 }
85
86 private long bytesWritten;
87 }