/*
* The MIT License
*
* Copyright (c) 2011, CloudBees, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.util.io;
import java.io.File;
import java.io.IOException;
/**
* {@link ReopenableFileOutputStream} that does log rotation upon rewind.
*
* @author Kohsuke Kawaguchi
* @since 1.416
*/
public class ReopenableRotatingFileOutputStream extends ReopenableFileOutputStream {
/**
* Number of log files to keep.
*/
private final int size;
public ReopenableRotatingFileOutputStream(File out, int size) {
super(out);
this.size = size;
}
protected File getNumberedFileName(int n) {
if (n==0) return out;
return new File(out.getPath()+"."+n);
}
@Override
public void rewind() throws IOException {
super.rewind();
for (int i=size-1;i>=0;i--) {
File fi = getNumberedFileName(i);
if (fi.exists()) {
File next = getNumberedFileName(i+1);
next.delete();
fi.renameTo(next);
}
}
}
/**
* Deletes all the log files, including rotated files.
*/
public void deleteAll() {
for (int i=0; i<=size; i++) {
getNumberedFileName(i).delete();
}
}
}