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From Ceki Gülcü <c...@qos.ch>
Subject Re: improving PropertyConfigurator.configureAndWatch
Date Mon, 08 Dec 2003 14:43:56 GMT

I think that Mark will find this fascinating. I sure do.

At 03:00 PM 12/8/2003 +0100, ROQUES Arnaud - NTR ( 
ARoques@nanterre.sema.slb.com ) wrote:
>log4j is great, but I think that
>PropertyConfigurator.configureAndWatch(String configFilename) is not good
>enough for
>dynamic modification, as you have to wait until the delay so that your
>modification are taken into account.
>So I imagine a solution: to put a *very* little FTP server in the
>application on a particular port (example:2100).
>When you put a file on this server, the file is not saved on disk, but sent
>to PropertyConfigurator, so that modifications of the configu are taken into
>account immediatly. (You can log with any username and password)
>(Some text editor have embedded FTP client, so it can be very easy to change
>the log4j configuration with them)
>I have coded this little FTP server, so if you want to use it, all you have
>to do is:
>                 PropertyConfigurator.configure("myconf.properties"); // 
> As usually
>                 new FTPServer(2100, "myconf.properties"); // Launch the 
> server on the 2100
>Note that when you put some files on the FTP server, data are *not* saved to
>disk. It's only sent to log4j PropertyConfigurator. (You can also get the
>last config from the FTP server).
>Please free to improve it, or to integrate it in next version of log4j!
>Arnaud Roques
>FTPServer.java file:
>import java.io.*;
>import java.net.*;
>import java.util.*;
>import org.apache.log4j.*;
>public class FTPServer extends Thread
>         ServerSocket server;
>         ArrayList data;
>         FTPServer(int port, String fileName) throws Exception
>         {
>                 data = new ArrayList();
>                 File f = new File(fileName);
>                 BufferedReader br = new BufferedReader(new FileReader(f));
>                 String s;
>                 while ((s=br.readLine())!=null)
>                         data.add(s);
>                 server = new ServerSocket(port);
>                 System.err.println("FTP Server on " +
>InetAddress.getLocalHost().getHostAddress()+" "+port);
>                 start();
>         }

Ceki Gülcü

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