001/**
002 * Copyright (C) 2014  Universidade de Aveiro, DETI/IEETA, Bioinformatics Group - http://bioinformatics.ua.pt/
003 *
004 * This file is part of Dicoogle/dicoogle.
005 *
006 * Dicoogle/dicoogle is free software: you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation, either version 3 of the License, or
009 * (at your option) any later version.
010 *
011 * Dicoogle/dicoogle is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014 * GNU General Public License for more details.
015 *
016 * You should have received a copy of the GNU General Public License
017 * along with Dicoogle.  If not, see <http://www.gnu.org/licenses/>.
018 */
019package pt.ua.dicoogle.utils;
020
021import java.lang.management.ManagementFactory;
022import java.lang.management.OperatingSystemMXBean;
023import java.lang.management.ThreadMXBean;
024import java.util.Date;
025
026/**
027 *
028 * @author Luís A. Bastião Silva <bastiao@ua.pt>
029 */
030public class CPULoad
031{
032
033
034    public CPULoad()
035    {
036
037    }
038
039    public double cpuLoad()
040    {
041
042        ThreadMXBean TMB = ManagementFactory.getThreadMXBean();
043        long time = new Date().getTime() * 1000000;
044        long cput = 0;
045        double cpuperc = -1;
046
047        //Begin loop.
048
049        if( TMB.isThreadCpuTimeSupported() )
050        {
051                if(new Date().getTime() * 1000000 - time > 1000000000) //Reset once per second
052                {
053                        time = new Date().getTime() * 1000000;
054                        cput = TMB.getCurrentThreadCpuTime();
055                }
056
057                if(!TMB.isThreadCpuTimeEnabled())
058                {
059                        TMB.setThreadCpuTimeEnabled(true);
060                }
061
062                if(new Date().getTime() * 1000000 - time != 0)
063                        cpuperc = (TMB.getCurrentThreadCpuTime() - cput) / (new Date().getTime() * 1000000.0 - time) * 100.0;
064            }
065        else
066        {
067            cpuperc = -2;
068        }
069
070        return cpuperc;
071
072    }
073
074    public static double getAvgCpu()
075    {
076        OperatingSystemMXBean osBean=ManagementFactory.getOperatingSystemMXBean();
077        return osBean.getSystemLoadAverage();
078    }
079
080
081
082    
083    
084
085    
086
087}
088