File D:\maven-qcr-plugin-testsunitaires\qcr4java\jenkins-master\target\site\qc\core\src\main\java\hudson\util\io\ReopenableRotatingFileOutputStream.java.html

1 /*
2 * The MIT License
3 *
4 * Copyright (c) 2011, CloudBees, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 package hudson.util.io;
25
26 import java.io.File;
27 import java.io.IOException;
28
29 /**
30 * {@link ReopenableFileOutputStream} that does log rotation upon rewind.
31 *
32 * @author Kohsuke Kawaguchi
33 * @since 1.416
34 */
35 public class ReopenableRotatingFileOutputStream extends ReopenableFileOutputStream {
36 /**
37 * Number of log files to keep.
38 */
39 private final int size;
40
41 public ReopenableRotatingFileOutputStream(File out, int size) {
42 super(out);
43 this.size = size;
44 }
45
46 protected File getNumberedFileName(int n) {
47 if (n==0) return out;
48 return new File(out.getPath()+"."+n);
49 }
50
51 @Override
52 public void rewind() throws IOException {
53 super.rewind();
54 for (int i=size-1;i>=0;i--) {
55 File fi = getNumberedFileName(i);
56 if (fi.exists()) {
57 File next = getNumberedFileName(i+1);
58 next.delete();
59 fi.renameTo(next);
60 }
61 }
62 }
63
64 /**
65 * Deletes all the log files, including rotated files.
66 */
67 public void deleteAll() {
68 for (int i=0; i<=size; i++) {
69 getNumberedFileName(i).delete();
70 }
71 }
72 }
73