org.apache.tomcat.util.log.CommonLogHandler.java Source code

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Here is the source code for org.apache.tomcat.util.log.CommonLogHandler.java

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/*
 * ====================================================================
 * 
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */
package org.apache.tomcat.util.log;

import java.util.Hashtable;

import org.apache.commons.logging.LogFactory;

/**
 *  Log using common-logging.
 *
 * @author Costin Manolache
 */
public class CommonLogHandler extends LogHandler {

    private Hashtable loggers = new Hashtable();

    /**
     * Prints log message and stack trace.
     * This method should be overriden by real logger implementations
     *
     * @param   prefix      optional prefix. 
     * @param   message      the message to log. 
     * @param   t      the exception that was thrown.
     * @param   verbosityLevel   what type of message is this?
     *             (WARNING/DEBUG/INFO etc)
     */
    public void log(String prefix, String msg, Throwable t, int verbosityLevel) {
        if (prefix == null)
            prefix = "tomcat";

        org.apache.commons.logging.Log l = (org.apache.commons.logging.Log) loggers.get(prefix);
        if (l == null) {
            l = LogFactory.getLog(prefix);
            loggers.put(prefix, l);
        }

        if (verbosityLevel > this.level)
            return;

        if (t == null) {
            if (verbosityLevel == Log.FATAL)
                l.fatal(msg);
            else if (verbosityLevel == Log.ERROR)
                l.error(msg);
            else if (verbosityLevel == Log.WARNING)
                l.warn(msg);
            else if (verbosityLevel == Log.INFORMATION)
                l.info(msg);
            else if (verbosityLevel == Log.DEBUG)
                l.debug(msg);
        } else {
            if (verbosityLevel == Log.FATAL)
                l.fatal(msg, t);
            else if (verbosityLevel == Log.ERROR)
                l.error(msg, t);
            else if (verbosityLevel == Log.WARNING)
                l.warn(msg, t);
            else if (verbosityLevel == Log.INFORMATION)
                l.info(msg, t);
            else if (verbosityLevel == Log.DEBUG)
                l.debug(msg, t);
        }
    }

    /**
     * Flush the log. 
     */
    public void flush() {
        // Nothing - commons logging doesn't have the notion
    }

    /**
     * Close the log. 
     */
    public synchronized void close() {
        // Nothing - commons logging doesn't have the notion
    }

}