new user question re: configuring log4j via code

[Dave Gomboc <da...@cs.ualberta.ca>]

I have code to launch several independent processes, which then set up
socket connections with each other.  I'd like to use log4j to acquire 
execution trace information to assist me in finding bugs in that code.

I have a LoggingConfiguration() that I call at the start of each
independent process to set up logging.  Currently the filename is fixed,
but I actually want to use the process id number as the name of the log
file (I just haven't done that yet).

Currently it's hardwired, but the file c:\trace.log doesn't showed up.
I assume I'm missing something simple?  Almost all of the examples I have 
seen use a configuration file (log4j.properties) instead of code setup, 
but I didn't want to do this because I wanted the name of the logfile to 
include the process id.

Here's LoggingConfiguration:

[package statement]

import org.apache.log4j.FileAppender;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.Logger;


public class LoggingConfiguration {

    LoggingConfiguration() {

        // Dump lots for now; figure out what I don't need later.
        PatternLayout layout = new PatternLayout("%d %x %t %p %l %throwable: %m%n");

        FileAppender fileAppender = new FileAppender();
        fileAppender.setFile("c:\\trace.log");
        fileAppender.setAppend(true);
        fileAppender.setImmediateFlush(true);
        fileAppender.setLayout(layout);
        fileAppender.activateOptions();

        Logger log = Logger.getRootLogger();
        log.addAppender(fileAppender);
    };

};


And in other files, I do:

[package...]
[imports...]

public class Foo.Bar {

    private static Logger log = Logger.getLogger(Foo.Bar.class);

[and for each routine I am interested in]

    public boolean someRoutine() {

        log.trace("Entered.");

        [boolean result = ....;]

        log.trace("Exited: result = |{}|.", result);
    };

};


1) What am I missing to make the log file (files, once I start using 
the process id for the name) show up?
2) Is there anything else an experienced user sees that I am doing 
incorrectly?

Thanks,
Dave


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Re: new user question re: configuring log4j via code

[Dave Gomboc <da...@cs.ualberta.ca>]

On Tue, 28 Jun 2005, Dave Gomboc wrote:

[small correction]

>     public boolean someRoutine() {
> 
>         log.trace("Entered.");
> 
>         [boolean result = ....;]
> 
          log.trace("Exiting: result = |{}|.", result);
          return result;
>     };
> 
> };


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