/*

 * Copyright (c) 2003, 2008, 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

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 */

/*

 * @test

 * @bug     4858522

 * @summary Basic unit test of HotspotClassLoadingMBean.getClassInitializationTime()

 * @author  Steve Bohne

 */

/*

 * This test is just a sanity check and does not check for the correct value.

 */

import sun.management.*;

public class GetClassInitializationTime {

    private static HotspotClassLoadingMBean mbean =

        (HotspotClassLoadingMBean)ManagementFactoryHelper.getHotspotClassLoadingMBean();

    // Careful with these values.

    private static final long MIN_TIME_FOR_PASS = 1;

    private static final long MAX_TIME_FOR_PASS = Long.MAX_VALUE;

    private static boolean trace = false;

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

        if (args.length > 0 && args[0].equals("trace")) {

            trace = true;

        }

        long time = mbean.getClassInitializationTime();

        if (trace) {

            System.out.println("Class initialization time (ms): " + time);

        }

        if (time < MIN_TIME_FOR_PASS || time > MAX_TIME_FOR_PASS) {

            throw new RuntimeException("Class initialization time " +

                                       "illegal value: " + time + " ms " +

                                       "(MIN = " + MIN_TIME_FOR_PASS + "; " +

                                       "MAX = " + MAX_TIME_FOR_PASS + ")");

        }

        // Load a class and make sure the time increases

        Class.forName("ClassToInitialize");

        long time2 = mbean.getClassInitializationTime();

        if (trace) {

            System.out.println("Class initialization time2 (ms): " + time2);

        }

        if (time2 <= time) {

            throw new RuntimeException("Class initialization time " +

                                       "did not increase when class loaded " +

                                       "(time = " + time + "; " +

                                       "time2 = " + time2 + ")");

        }

        System.out.println("Test passed.");

    }

}

// This class should just cause the initialization timer to run

class ClassToInitialize {

    static {

        try {

            Thread.sleep(1000);

        } catch (InterruptedException ie) {

            // do nothing

        }

    }

}