/*
* Copyright 2010 NCHOVY
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.krakenapps.winapi;
import java.util.Date;
public class SystemTime {
private int idlePercent;
private int kernelPercent;
private int userPercent;
static {
System.loadLibrary("winapi");
}
public SystemTime() throws InterruptedException {
this(100);
}
public SystemTime(int interval) throws InterruptedException {
long[] first = getSystemTimes();
long begin = new Date().getTime();
Thread.sleep(interval);
long[] second = getSystemTimes();
long end = new Date().getTime();
idlePercent = (int) ((second[0] - first[0]) / (end - begin) / 100 / Process.getProcessorCount());
kernelPercent = (int) ((second[1] - first[1]) / (end - begin) / 100 / Process.getProcessorCount())
- idlePercent;
userPercent = (int) ((second[2] - first[2]) / (end - begin) / 100 / Process.getProcessorCount());
idlePercent = 100 - (kernelPercent + userPercent);
if (idlePercent < 0)
idlePercent = 0;
}
private native long[] getSystemTimes();
public int getUsage() {
int usage = userPercent + kernelPercent;
return usage > 100 ? 100 : usage;
}
public int getIdlePercent() {
return idlePercent;
}
public int getKernelPercent() {
return kernelPercent;
}
public int getUserPercent() {
return userPercent;
}
@Override
public String toString() {
return "idle=" + idlePercent + ", kernel=" + kernelPercent + ", user=" + userPercent;
}
}