Re: [Mav-user] Logging from controller

Louis Malenica Thu, 11 May 2006 03:15:00 -0700

Hi Jeff,

Thanks for responding. I have written a simple Listener class that is loaded at startup by Tomcat, which makes a static logger available to the web-app (both as a static getter and a servlet context param), and I have no problem using it from other areas such as jsp or servlets or non-maverick pojo's. The logger itself is a simple custom jdk1.4 logger (ie not log4j) and uses a very simple formatter. It uses a FileHandler that points to a txt file in WEB-INF. No errors appear to be generated and as far as I'm aware there are no weird classloader issues.

here is the Listener that creates the logger:

public class SiteLogger implements ServletContextListener {

    private static Logger logger;

    public static Logger getLogger() {
        return logger;
    }

    public void contextInitialized(ServletContextEvent e) {

        ServletContext sc = e.getServletContext();

        // get logger instance.
        logger = Logger.getLogger("global");
        // TODO: Should really be injected.
        logger.setLevel(Level.INFO);

        try {
            FileHandler fh = null;
            String root = sc.getRealPath("/");
            // TODO: Again value should be injected.
            fh = new FileHandler(root+"WEB-INF/log.txt");
            CustomFormatter cf = new CustomFormatter();
            fh.setFormatter(cf);

            logger.addHandler(fh);
        } catch(IOException ioe) {
            System.err.println("Can't load logger" + ioe.getMessage());
        }
        sc.setAttribute("fw.logging.SiteLogger", logger);
    }
...etc

here is the web.xml entry for the listener:

    <listener>
        <listener-class>fw.logging.SiteLogger</listener-class>
    </listener>

here is the code that does the logging in the controller's perform() method:

import fw.logging.SiteLogger;
...
SiteLogger.getLogger().log(Level.INFO, obj);

LM

Jeff Schnitzer wrote:

Unfortunately I'm pretty sure that's going to be far too general a question. You need to explain how your logging framework works if anyone's going to be able to help you. Does it do anything weird with classloaders?

Jeff

Louis Malenica wrote:

Hi,

I am trying to log via a standard custom logger from within the
perform() method of a controller that extends ThrowawayBean2. HOwever
nothing is being logged. My logging framework seems ok as it is
logging elsewhere in the app. Anyone come across this before?

thanks.

LM
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Re: [Mav-user] Logging from controller

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