001/**
002 * Copyright (c) 2004-2011 QOS.ch
003 * All rights reserved.
004 *
005 * Permission is hereby granted, free  of charge, to any person obtaining
006 * a  copy  of this  software  and  associated  documentation files  (the
007 * "Software"), to  deal in  the Software without  restriction, including
008 * without limitation  the rights to  use, copy, modify,  merge, publish,
009 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
010 * permit persons to whom the Software  is furnished to do so, subject to
011 * the following conditions:
012 *
013 * The  above  copyright  notice  and  this permission  notice  shall  be
014 * included in all copies or substantial portions of the Software.
015 *
016 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
017 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
018 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
019 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
020 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
021 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
022 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
023 *
024 */
025package org.slf4j.profiler;
026
027/**
028 * 
029 * This demo illustrates usage of SLF4J profilers.
030 * 
031 * <p>
032 * We have been given the task of generating a large number, say N, of random
033 * integers. We need to transform that array into a smaller array containing
034 * only prime numbers. The new array has to be sorted.
035 * 
036 * <p>
037 * While tackling this problem, we would like to measure the time spent in each
038 * subtask.
039 * 
040 * <p>
041 * A typical output for this demo would be:
042 * 
043 * <pre>
044   + Profiler [BASIC]
045   |-- elapsed time                      [A]   213.186 milliseconds.
046   |-- elapsed time                      [B]  2499.107 milliseconds.
047   |-- elapsed time                  [OTHER]  3300.752 milliseconds.
048   |-- Total                         [BASIC]  6014.161 milliseconds.
049  </pre>
050 * 
051 * @author Ceki Gulcu
052 */
053public class BasicProfilerDemo {
054
055    public static void main(String[] args) {
056        // create a profiler called "BASIC"
057        Profiler profiler = new Profiler("BASIC");
058        profiler.start("A");
059        doA();
060
061        profiler.start("B");
062        doB();
063
064        profiler.start("OTHER");
065        doOther();
066        profiler.stop().print();
067    }
068
069    static private void doA() {
070        delay(200);
071    }
072
073    static private void doB() {
074        delay(2500);
075    }
076
077    static private void doOther() {
078        delay(3300);
079    }
080
081    static private void delay(int millis) {
082        try {
083            Thread.sleep(millis);
084        } catch (InterruptedException e) {
085        }
086    }
087}