Good stuff.
I was considering it a need and find someone post the code this morning !
The rest is as easy as writing a similar code using gzip and add it
to my logging package.
One question: Why no fileEntry.close() in stream close code ?
I know nothing about how zip compression works and gzip appears to
require no such ZipEntry stuff, so I use gzip instead.
Thanks to Oleg.
Jin
Hello everyone.
I am using log4j already in my second project.
At last time we found very big problem to manage logs on remote
machine with
low-band connection.
So before open the log I have to commpress it and than download.
So I extend the RillingFileAppender like shown later:
If I am right , or you going to make more flexible
rollingfileappender that
will be more easy to extend?
Thank you for you.
With best wishes Oleg Zaidiner.
mailto:[EMAIL PROTECTED]
Software Engineer InirU Ltd.
public class RollingZipFileAppender extends RollingFileAppender
{
/**
* move current file to current.1.zip and rename all the files ".x.zip"
* to ".x+1.zip"...
*/
public // synchronization not necessary since doAppend is already
synched
void rollOver() {
File target;
File file;
// If maxBackups <= 0, then there is no file renaming to be done.
if(maxBackupIndex > 0) {
// Delete the oldest file, to keep Windows happy.
file = new File(fileName + '.' + maxBackupIndex + ".zip"); //
added by
Oleg
if (file.exists())
file.delete();
// Map {(maxBackupIndex - 1), ..., 2, 1} to {maxBackupIndex, ..., 3,
2}
for (int i = maxBackupIndex - 1; i >= 1; i--) {
file = new File(fileName + "." + i + ".zip" ); // added by Oleg
if (file.exists()) {
target = new File(fileName + '.' + (i + 1) + ".zip" ); //
added by
Oleg
file.renameTo(target);
}
}
// Rename fileName to fileName.1
target = new File(fileName + "." + 1);
this.closeFile(); // keep windows happy.
file = new File(fileName);
file.renameTo(target);
zipFile(target.getPath()); // added by Oleg
}
try {
// This will also close the file. This is OK since multiple
// close operations are safe.
this.setFile(fileName, false);
}
catch(IOException e) {
LogLog.error("setFile("+fileName+", false) call failed.", e);
}
}
public void zipFile(String filePath) {
// Using try is required because of file io.
FileOutputStream fos = null;
ZipOutputStream zos = null;
try {
// Init Zip file stream.
fos = new FileOutputStream(filePath+".zip");
zos = new ZipOutputStream(fos);
// Create a file input stream and a buffered input
stream.
FileInputStream fis = new
FileInputStream(filePath);
BufferedInputStream bis = new
BufferedInputStream(fis);
// Create a Zip Entry and put it into the archive
(no data yet).
ZipEntry fileEntry = new ZipEntry(filePath);
zos.putNextEntry(fileEntry);
// Create a byte array object named data and
declare
byte count variable.
byte[] data = new byte[1024];
int byteCount;
// Create a loop that reads from the
buffered input
stream and writes
// to the zip output stream until the bis has been
entirely read.
while ((byteCount = bis.read(data, 0, 1024))
> -1) {
zos.write(data, 0, byteCount);
}
// Close Zip output Stream
zos.flush();
zos.close();
fos.close();
} catch (IOException e) {
}
System.out.println(filePath);
}
}
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