Java

Limiting log size

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Join Date: Aug 2007

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lookof2day lookof2day is offline

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Limiting log size

Dec 6th, 2007

Hi,

I'm trying to reproduce a Production Exception. In order to reproduce it I want to limit the size of my log file. Is there a way so that I can limit the size of my log i.e., my log should not grow beyond a limit. Is there a java class available for it? Please help.

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Join Date: May 2007

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Ezzaral

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Re: Limiting log size

Dec 6th, 2007

What are you using for logging currently? You might take a look at http://java.sun.com/javase/6/docs/ap...e-summary.html

or Log4J.

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Join Date: Jun 2006

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~s.o.s~

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Failure as a human

Re: Limiting log size

Dec 6th, 2007

Here is a crude example assuming that you are using the Logging API of Java and not some third party logging library.

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
public class Main {
 
    private static Logger _log = Logger.getLogger(Main.class.toString());
 
    public static void main(String[] args) throws Exception {
        FileHandler handler = new FileHandler("c:/abcd", 512, 512);
        handler.setFormatter(new SimpleFormatter());
        _log.addHandler(handler);
        LogManager manager = LogManager.getLogManager();
        manager.addLogger(_log);
        for (int i = 0; i < 128; ++i) {
            _log.info("hello to all the people out there: " + i);
        }
        handler.close();
    }
}
public class Main {

    private static Logger _log = Logger.getLogger(Main.class.toString());

    public static void main(String[] args) throws Exception {
        FileHandler handler = new FileHandler("c:/abcd", 512, 512);
        handler.setFormatter(new SimpleFormatter());
        _log.addHandler(handler);
        LogManager manager = LogManager.getLogManager();
        manager.addLogger(_log);
        for (int i = 0; i < 128; ++i) {
            _log.info("hello to all the people out there: " + i);
        }
        handler.close();
    }
}

Here we use the FileHandler class instance to set the logger to write to the file system. It's constructor takes three parameters in our case: the path or the pattern with which you want to name your log files, the limit on the size of log files in bytes and the number of files to use when rotating.

From all the log files created, the file with the highest count will contain the most recent log information i.e. abcd1.log will contain the most recent log information.

Just fiddle around with the program and the API's and you would be just file.

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