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 *

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

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

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

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 *

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/*

 * @test

 * @bug     6314913

 * @summary Basic Test for HotSpotDiagnosticMXBean.getVMOption()

 * @author  Mandy Chung

 *

 * @run main/othervm -XX:+PrintGCDetails GetVMOption

 */

import com.sun.management.HotSpotDiagnosticMXBean;

import com.sun.management.VMOption;

import java.lang.management.ManagementFactory;

import java.util.List;

import javax.management.MBeanServer;

public class GetVMOption {

    private static final String PRINT_GC_DETAILS = "PrintGCDetails";

    private static final String EXPECTED_VALUE = "true";

    private static final String BAD_OPTION = "BadOption";

    private static final String HOTSPOT_DIAGNOSTIC_MXBEAN_NAME =

        "com.sun.management:type=HotSpotDiagnostic";

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

        List<HotSpotDiagnosticMXBean> list =

            ManagementFactory.getPlatformMXBeans(HotSpotDiagnosticMXBean.class);

        HotSpotDiagnosticMXBean mbean = list.get(0);

        checkVMOption(mbean);

        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();

        mbean = ManagementFactory.newPlatformMXBeanProxy(mbs,

                    HOTSPOT_DIAGNOSTIC_MXBEAN_NAME,

                    HotSpotDiagnosticMXBean.class);

        checkVMOption(mbean);

    }

    private static void checkVMOption(HotSpotDiagnosticMXBean mbean) {

        VMOption option = mbean.getVMOption(PRINT_GC_DETAILS);

        if (!option.getValue().equalsIgnoreCase(EXPECTED_VALUE)) {

            throw new RuntimeException("Unexpected value: " +

                option.getValue() + " expected: " + EXPECTED_VALUE);

        }

        boolean iae = false;

        try {

            mbean.getVMOption(BAD_OPTION);

        } catch (IllegalArgumentException e) {

            iae = true;

        }

        if (!iae) {

            throw new RuntimeException("Invalid VM Option" +

                " was not detected");

        }

    }

}