com.sun.faces.util.Timer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces-api Show documentation

Jakarta Faces defines an MVC framework for building user interfaces for web applications, including UI components, state management, event handing, input validation, page navigation, and support for internationalization and accessibility.

There is a newer version: 4.1.2

Show newest version

/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.faces.util;

import static java.util.logging.Level.FINE;

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

/**
 * This class is a simple wrapper for timing method calls. The traditional method 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();

    private final Level logLevel;

    private long start;
    private long stop;

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

    private Timer(final Level logLevel) {
        this.logLevel = logLevel;
    }

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

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

    public static Timer getInstance(Level logLevel) {
        if (LOGGER.isLoggable(logLevel)) {
            return new Timer(logLevel);
        }

        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(logLevel)) {
            LOGGER.log(logLevel, " [TIMING] - [" + getTimingResult() + "ms] : " + taskInfo);
        }
    }

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

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