/*

 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug     7028071

 * @summary Basic unit test of OperatingSystemMXBean.getProcessCpuLoad()

 *

 * @run main GetSystemCpuLoad

 */

import java.lang.management.*;

import com.sun.management.OperatingSystemMXBean;

public class GetSystemCpuLoad {

    public static void main(String[] argv) throws Exception {

        OperatingSystemMXBean mbean = (com.sun.management.OperatingSystemMXBean)

            ManagementFactory.getOperatingSystemMXBean();

        double load;

        for(int i=0; i<10; i++) {

            load = mbean.getSystemCpuLoad();

            if((load<0.0 || load>1.0) && load != -1.0) {

                throw new RuntimeException("getSystemCpuLoad() returns " + load

                       +  " which is not in the [0.0,1.0] interval");

            }

            try {

                Thread.sleep(200);

            } catch(InterruptedException e) {

                e.printStackTrace();

            }

        }

    }

}