CPD Results

public class ServletContextCleaner implements ServletContextListener {

    private static final Class<?>[] RELEASE_SIGNATURE = { ClassLoader.class };

    /**
     * Constructs a new instance.
     */
    public ServletContextCleaner() {
        // empty
    }

    /**
     * Invoked when a webapp is undeployed, this tells the LogFactory
     * class to release any logging information related to the current
     * contextClassloader.
     */
    @Override
    public void contextDestroyed(final ServletContextEvent sce) {
        final ClassLoader tccl = Thread.currentThread().getContextClassLoader();

        final Object[] params = new Object[1];
        params[0] = tccl;

        // Walk up the tree of class loaders, finding all the available
        // LogFactory classes and releasing any objects associated with
        // the tccl (ie the webapp).
        //
        // When there is only one LogFactory in the classpath, and it
        // is within the webapp being undeployed then there is no problem;
        // garbage collection works fine.
        //
        // When there are multiple LogFactory classes in the classpath but
        // parent-first classloading is used everywhere, this loop is really
        // short. The first instance of LogFactory found will
        // be the highest in the classpath, and then no more will be found.
        // This is ok, as with this setup this will be the only LogFactory
        // holding any data associated with the tccl being released.
        //
        // When there are multiple LogFactory classes in the classpath and
        // child-first classloading is used in any class loader, then multiple
        // LogFactory instances may hold info about this TCCL; whenever the
        // webapp makes a call into a class loaded via an ancestor class loader
        // and that class calls LogFactory the tccl gets registered in
        // the LogFactory instance that is visible from the ancestor
        // class loader. However the concrete logging library it points
        // to is expected to have been loaded via the TCCL, so the
        // underlying logging lib is only initialized/configured once.
        // These references from ancestor LogFactory classes down to
        // TCCL class loaders are held via weak references and so should
        // be released but there are circumstances where they may not.
        // Walking up the class loader ancestry ladder releasing
        // the current tccl at each level tree, though, will definitely
        // clear any problem references.
        ClassLoader loader = tccl;
        while (loader != null) {
            // Load via the current loader. Note that if the class is not accessible
            // via this loader, but is accessible via some ancestor then that class
            // will be returned.
            try {
                @SuppressWarnings("unchecked")
                final Class<LogFactory> logFactoryClass = (Class<LogFactory>) loader.loadClass("org.apache.commons.logging.LogFactory");
                final Method releaseMethod = logFactoryClass.getMethod("release", RELEASE_SIGNATURE);
                releaseMethod.invoke(null, params);
                loader = logFactoryClass.getClassLoader().getParent();
            } catch (final ClassNotFoundException ex) {
                // Neither the current class loader nor any of its ancestors could find
                // the LogFactory class, so we can stop now.
                loader = null;
            } catch (final NoSuchMethodException ex) {
                // This is not expected; every version of JCL has this method
                System.err.println("LogFactory instance found which does not support release method!");
                loader = null;
            } catch (final IllegalAccessException ex) {
                // This is not expected; every ancestor class should be accessible
                System.err.println("LogFactory instance found which is not accessible!");
                loader = null;
            } catch (final InvocationTargetException ex) {
                // This is not expected
                System.err.println("LogFactory instance release method failed!");
                loader = null;
            }
        }

        // Just to be sure, invoke release on the LogFactory that is visible from
        // this ServletContextCleaner class too. This should already have been caught
        // by the above loop but just in case...
        LogFactory.release(tccl);
    }

    /**
     * Invoked when a webapp is deployed. Nothing needs to be done here.
     */
    @Override
    public void contextInitialized(final ServletContextEvent sce) {
        // do nothing
    }
}

}

    /**
     * Gets the native Logger instance we are using.
     *
     * @return the native Logger instance we are using.
     */
    public Logger getLogger() {
        if (logger == null) {
            logger = Logger.getLogger(name);
        }
        return logger;
    }

    /**
     * Logs a message with {@link java.util.logging.Level#INFO}.
     *
     * @param message to log
     * @see org.apache.commons.logging.Log#info(Object)
     */
    @Override
    public void info(final Object message) {
        log(Level.INFO, String.valueOf(message), null);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#INFO}.
     *
     * @param message to log
     * @param exception log this cause
     * @see org.apache.commons.logging.Log#info(Object, Throwable)
     */
    @Override
    public void info(final Object message, final Throwable exception) {
        log(Level.INFO, String.valueOf(message), exception);
    }

    /**
     * Is debug logging currently enabled?
     */
    @Override
    public boolean isDebugEnabled() {
        return getLogger().isLoggable(Level.FINE);
    }

    /**
     * Is error logging currently enabled?
     */
    @Override
    public boolean isErrorEnabled() {
        return getLogger().isLoggable(Level.SEVERE);
    }

    /**
     * Is fatal logging currently enabled?
     */
    @Override
    public boolean isFatalEnabled() {
        return getLogger().isLoggable(Level.SEVERE);
    }

    /**
     * Is info logging currently enabled?
     */
    @Override
    public boolean isInfoEnabled() {
        return getLogger().isLoggable(Level.INFO);
    }

    /**
     * Is trace logging currently enabled?
     */
    @Override
    public boolean isTraceEnabled() {
        return getLogger().isLoggable(Level.FINEST);
    }

    /**
     * Is warn logging currently enabled?
     */
    @Override
    public boolean isWarnEnabled() {
        return getLogger().isLoggable(Level.WARNING);
    }

public Jdk13LumberjackLogger(final String name) {
        this.name = name;
        logger = getLogger();
    }

    /**
     * Logs a message with {@link java.util.logging.Level#FINE}.
     *
     * @param message to log
     * @see org.apache.commons.logging.Log#debug(Object)
     */
    @Override
    public void debug(final Object message) {
        log(Level.FINE, String.valueOf(message), null);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#FINE}.
     *
     * @param message to log
     * @param exception log this cause
     * @see org.apache.commons.logging.Log#debug(Object, Throwable)
     */
    @Override
    public void debug(final Object message, final Throwable exception) {
        log(Level.FINE, String.valueOf(message), exception);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#SEVERE}.
     *
     * @param message to log
     * @see org.apache.commons.logging.Log#error(Object)
     */
    @Override
    public void error(final Object message) {
        log(Level.SEVERE, String.valueOf(message), null);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#SEVERE}.
     *
     * @param message to log
     * @param exception log this cause
     * @see org.apache.commons.logging.Log#error(Object, Throwable)
     */
    @Override
    public void error(final Object message, final Throwable exception) {
        log(Level.SEVERE, String.valueOf(message), exception);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#SEVERE}.
     *
     * @param message to log
     * @see org.apache.commons.logging.Log#fatal(Object)
     */
    @Override
    public void fatal(final Object message) {
        log(Level.SEVERE, String.valueOf(message), null);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#SEVERE}.
     *
     * @param message to log
     * @param exception log this cause
     * @see org.apache.commons.logging.Log#fatal(Object, Throwable)
     */
    @Override
    public void fatal(final Object message, final Throwable exception) {
        log(Level.SEVERE, String.valueOf(message), exception);
    }

if (getLogger().isInfoEnabled()) {
            getLogger().info(String.valueOf(message), t);
        }
    }

    /**
     * Is logging to {@code org.apache.avalon.framework.logger.Logger.debug} enabled?
     *
     * @see org.apache.commons.logging.Log#isDebugEnabled()
     */
    @Override
    public boolean isDebugEnabled() {
        return getLogger().isDebugEnabled();
    }

    /**
     * Is logging to {@code org.apache.avalon.framework.logger.Logger.error} enabled?
     *
     * @see org.apache.commons.logging.Log#isErrorEnabled()
     */
    @Override
    public boolean isErrorEnabled() {
        return getLogger().isErrorEnabled();
    }

    /**
     * Is logging to {@code org.apache.avalon.framework.logger.Logger.fatalError} enabled?
     *
     * @see org.apache.commons.logging.Log#isFatalEnabled()
     */
    @Override
    public boolean isFatalEnabled() {
        return getLogger().isFatalErrorEnabled();
    }

    /**
     * Is logging to {@code org.apache.avalon.framework.logger.Logger.info} enabled?
     *
     * @see org.apache.commons.logging.Log#isInfoEnabled()
     */
    @Override
    public boolean isInfoEnabled() {
        return getLogger().isInfoEnabled();
    }

    /**
     * Is logging to {@code org.apache.avalon.framework.logger.Logger.debug} enabled?
     *
     * @see org.apache.commons.logging.Log#isTraceEnabled()
     */
    @Override
    public boolean isTraceEnabled() {
        return getLogger().isDebugEnabled();
    }

    /**
     * Is logging to {@code org.apache.avalon.framework.logger.Logger.warn} enabled?
     *
     * @see org.apache.commons.logging.Log#isWarnEnabled()
     */
    @Override
    public boolean isWarnEnabled() {
        return getLogger().isWarnEnabled();
    }

    /**
     * Logs a message with {@code org.apache.avalon.framework.logger.Logger.debug}.
     *
     * @param message to log
     * @see org.apache.commons.logging.Log#trace(Object)
     */
    @Override
    public void trace(final Object message) {

}
    }

    /**
     * Logs a message with {@link java.util.logging.Level#FINEST}.
     *
     * @param message to log
     * @see org.apache.commons.logging.Log#trace(Object)
     */
    @Override
    public void trace(final Object message) {
        log(Level.FINEST, String.valueOf(message), null);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#FINEST}.
     *
     * @param message to log
     * @param exception log this cause
     * @see org.apache.commons.logging.Log#trace(Object, Throwable)
     */
    @Override
    public void trace(final Object message, final Throwable exception) {
        log(Level.FINEST, String.valueOf(message), exception);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#WARNING}.
     *
     * @param message to log
     * @see org.apache.commons.logging.Log#warn(Object)
     */
    @Override
    public void warn(final Object message) {
        log(Level.WARNING, String.valueOf(message), null);
    }

    /**
     * Logs a message with {@link java.util.logging.Level#WARNING}.
     *
     * @param message to log
     * @param exception log this cause
     * @see org.apache.commons.logging.Log#warn(Object, Throwable)
     */
    @Override
    public void warn(final Object message, final Throwable exception) {
        log(Level.WARNING, String.valueOf(message), exception);
    }
}