/*

 * 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.

 *

 */

/*

 * @test

 * @bug     4956978

 * @summary The capability is disabled regardless of number of times

 *          it was enabled.

 * @author  Mandy Chung

 */

import java.lang.management.ThreadMXBean;

import java.lang.management.ManagementFactory;

public class DisableTest {

    private static ThreadMXBean tm = ManagementFactory.getThreadMXBean();

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

        testThreadContentionMonitoring();

        testThreadCpuMonitoring();

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

    }

    private static void testThreadContentionMonitoring()

        throws Exception {

        if (!tm.isThreadContentionMonitoringSupported()) {

            System.out.println("JVM does not supports thread contention monitoring");

            return;

        }

        // Default is false.

        tm.setThreadContentionMonitoringEnabled(false);

        tm.setThreadContentionMonitoringEnabled(false);

        // check if disabled

        if (tm.isThreadContentionMonitoringEnabled()) {

            throw new RuntimeException("TEST FAILED: " +

                "Expected thread contention monitoring to be disabled");

        }

        tm.setThreadContentionMonitoringEnabled(true);

        // check if enabled

        if (!tm.isThreadContentionMonitoringEnabled()) {

            throw new RuntimeException("TEST FAILED: " +

                "Expected thread contention monitoring to be enabled");

        }

    }

    private static void testThreadCpuMonitoring()

        throws Exception {

        if (!tm.isThreadCpuTimeSupported()) {

            System.out.println("JVM does not support thread CPU time monitoring");

            return;

        }

        if (tm.isThreadCpuTimeEnabled()) {

            tm.setThreadCpuTimeEnabled(false);

        }

        // check if disabled

        if (tm.isThreadCpuTimeEnabled()) {

            throw new RuntimeException("TEST FAILED: " +

                "Expected thread CPU time monitoring to be disabled");

        }

        tm.setThreadCpuTimeEnabled(false);

        tm.setThreadCpuTimeEnabled(false);

        if (tm.isThreadCpuTimeEnabled()) {

            throw new RuntimeException("TEST FAILED: " +

                "Expected thread CPU time monitoring to be disabled");

        }

        tm.setThreadCpuTimeEnabled(true);

        if (!tm.isThreadCpuTimeEnabled()) {

            throw new RuntimeException("TEST FAILED: " +

                "Expected thread CPU time monitoring to be disabled");

        }

    }

}