root/trunk/src/java/org/jcoderz/commons/util/LoggingUtils.java

/*
 * $Id$
 *
 * Copyright 2006, The jCoderZ.org Project. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
 *      copyright notice, this list of conditions and the following
 *      disclaimer in the documentation and/or other materials
 *      provided with the distribution.
 *    * Neither the name of the jCoderZ.org Project nor the names of
 *      its contributors may be used to endorse or promote products
 *      derived from this software without specific prior written
 *      permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.jcoderz.commons.util;

import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Helper class around JDK logging.
 * @author Andreas Mandel
 */
public final class LoggingUtils
{
    private static final String CLASSNAME = LoggingUtils.class.getName();
    private static final Logger logger = Logger.getLogger(CLASSNAME);


    private LoggingUtils ()
    {
        // NO INSTANCE
    }


    /**
     * Set all log levels of all active handlers to the given
     * level. Not for app server usage but helpful for small
     * local utilities.
     * @param level The level to be set in all registered Handlers.
     */
    public static void setGlobalHandlerLogLevel (Level level)
    {
        Assert.notNull(level, "level");
        final Handler[] handlers = Logger.getLogger("").getHandlers();
        for (int index = 0; index < handlers.length; index++)
        {
            try
            {
                handlers[index].setLevel(level);
            }
            catch (Exception e) // Might be a security exception...
            {
                logger.log(Level.FINE,
                    "Failed to change loglevel for Handler '"
                        + handlers[index] + "'.", e);
            }
        }
    }
}