Logger and file lock

[segolas]

Hi again,

I have a problem with the Logger object.

I have a single file "log.txt" and many classes write to it via a logger object. I notice that if the log file is locked, than the application create a new log.txt.1 file and write to it.

Why the new "writer" doesn't wait until the lock is gone? It would be better to have a single log file instead of many.

Another issue is that in a big for loop I have lots of objects writing the log. So when the app reach log.txt.99 an exception i raised (java.io.IOException: Couldn't get lock for log.txt).

In the API I didn't found any way for synchronizing the log, do I have to do it by myself??

Just a note I think may be useful, for avoiding repeate the same code for retrieving a new Logger in every class, I created another class "LoadDefault" with this method:

public Logger getLogger(String className) {

        Logger newLogger = Logger.getLogger(className);
        FileHandler fh = null;
        try {
            // append to the default log file
            fh = new FileHandler("log.txt", true);
            fh.setFormatter(new SimpleFormatter());

        } catch (IOException ex) {
            Logger.getLogger(MailManager.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SecurityException ex) {
            Logger.getLogger(MailManager.class.getName()).log(Level.SEVERE, null, ex);
        }
        newLogger.addHandler(fh);
        
        newLogger.info("##########################################################");
        return newLogger;

    }

Could this be the problem?

[segolas]

the solution is to use Log4j

[StormyWaters]

I would agree that the Log4j.jar is a much better for logging and would recommend using that instead.

But with regards to your current code try making the FileHandler a variable outside the method so you can use the same instance of it for each logger

[segolas]

mmm I think you're right!

but now I've modify all of my code to use log4j... maybe I'll try tomorrow (right now I'm going to throw my case out of the window!!)