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This is the master POM file for Sun's Implementation of the JSF 1.2 Specification.
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
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 * Header, with the fields enclosed by brackets [] replaced by your own
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
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 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
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 */

package com.sun.faces.util;

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

/**
 * This class is a simple wrapper for timing method calls.
 * The traditional methid is to add two variables, start, and stop,
 * and display the difference of these values.  Encapsulates
 * the process.
 */
public class Timer {

    private static final Logger LOGGER = FacesLogger.TIMING.getLogger();

    long start;
    long stop;


    // ------------------------------------------------------------ Constructors


    private Timer() { }


    // ---------------------------------------------------------- Public Methods


    /**
     * @return a new Timer instance if the TIMING
     *  logging level is FINE, otherwise, return null;
     */
    public static Timer getInstance() {
        if (LOGGER.isLoggable(Level.FINE)) {
            return new Timer();
        }
        return null;
    }


    /**
     * Start timing.
     */
    public void startTiming() {
        start = System.currentTimeMillis();
    }


    /**
     * Stop timing.
     */
    public void stopTiming() {
        stop = System.currentTimeMillis();
    }


    /**
     * Log the timing result.
     * @param taskInfo task description
     */
    public void logResult(String taskInfo) {
        if (LOGGER.isLoggable(Level.FINE)) {
            LOGGER.log(Level.FINE,
                   " [TIMING] - [" + getTimingResult() + "ms] : " + taskInfo);
        }
    }


    // --------------------------------------------------------- Private Methods


    /**
     * @return the time for this task
     */
    private long getTimingResult() {
        return (stop - start);
    }
}