/*+
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 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.+
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.+
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 *+
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 * This code is free software; you can redistribute it and/or modify it+
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 * under the terms of the GNU General Public License version 2 only, as+
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 * published by the Free Software Foundation.+
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 *+
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 * This code is distributed in the hope that it will be useful, but WITHOUT+
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or+
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License+
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 * version 2 for more details (a copy is included in the LICENSE file that+
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 * accompanied this code).+
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 *+
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 * You should have received a copy of the GNU General Public License version+
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 * 2 along with this work; if not, write to the Free Software Foundation,+
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.+
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 *+
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA+
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 * or visit www.oracle.com if you need additional information or have any+
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 * questions.+
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 */+
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+
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/*+
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 * @test+
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 * @bug     4858522+
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 * @summary Basic unit test of OperatingSystemMXBean.getProcessCpuTime()+
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 * @author  Steve Bohne+
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 */+
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+
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/*+
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 * This test is just a sanity check and does not check for the correct+
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 * value.  The correct value should be checked manually:+
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 * Solaris/Linux:+
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 *   1. In a shell, enter the command: "ps -ef"+
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 *   2. The value (reported in seconds) is in the "TIME" column for the process+
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 * Windows NT/XP/2000:+
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 *   1. Hit Ctrl-Alt-Delete, select Task Manager, select Processes tab+
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 *   2. The value (reported in seconds) is in the "CPU Time" column for the+
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 *      process.  You may have to add this column via View menu-> Select+
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 *      Columns... item.+
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 * Windows 98/ME:+
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 *   Not supported.+
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 */+
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+
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import com.sun.management.OperatingSystemMXBean;+
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import java.lang.management.*;+
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+
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public class GetProcessCpuTime {+
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+
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    private static OperatingSystemMXBean mbean =+
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        (com.sun.management.OperatingSystemMXBean)+
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        ManagementFactory.getOperatingSystemMXBean();+
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+
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+
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    // Careful with these values.+
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    private static final long MIN_TIME_FOR_PASS = 1;+
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    private static final long MAX_TIME_FOR_PASS = Long.MAX_VALUE;+
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+
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    // No max time.+
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+
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    private static boolean trace = false;+
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+
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    public static void main(String args[]) throws Exception {+
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        if (args.length > 0 && args[0].equals("trace")) {+
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            trace = true;+
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        }+
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+
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        // Consume cpu time+
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        double sum=0;+
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        for (int i=0; i <=2000000; i++) {+
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          sum += i;+
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          sum /= i;+
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        }+
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+
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        long ns = mbean.getProcessCpuTime();+
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        if (ns == -1) {+
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            System.out.println("getProcessCpuTime() is not supported");+
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            return;+
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        }+
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+
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        if (trace) {+
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            System.out.println("Process CPU time in ns: " + ns);+
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        }+
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+
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        if (ns < MIN_TIME_FOR_PASS || ns > MAX_TIME_FOR_PASS) {+
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            throw new RuntimeException("Process CPU time " ++
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                                       "illegal value: " + ns + " ns " ++
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                                       "(MIN = " + MIN_TIME_FOR_PASS + "; " ++
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                                       "MAX = " + MAX_TIME_FOR_PASS + ")");+
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        }+
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+
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        System.out.println("Test passed.");+
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    }+
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}+
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