/*

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 * 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     6314913

 * @summary Basic Test for HotSpotDiagnosticMXBean.setVMOption()

 *          and getDiagnosticOptions().

 * @author  Mandy Chung

 *

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

 */

import java.lang.management.ManagementFactory;

import java.util.*;

import com.sun.management.HotSpotDiagnosticMXBean;

import com.sun.management.VMOption;

import com.sun.management.VMOption.Origin;

import sun.misc.Version;

public class SetVMOption {

    private static String PRINT_GC_DETAILS = "PrintGCDetails";

    private static String EXPECTED_VALUE = "true";

    private static String BAD_VALUE = "yes";

    private static String NEW_VALUE = "false";

    private static String MANAGEMENT_SERVER = "ManagementServer";

    private static HotSpotDiagnosticMXBean mbean;

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

        List<HotSpotDiagnosticMXBean> list =

            ManagementFactory.getPlatformMXBeans(HotSpotDiagnosticMXBean.class);

        // The following test is transitional only and should be removed

        // once build 52 is promoted.

        int build = Version.jvmBuildNumber();

        if (build > 0 && build < 52) {

             // JVM support is integrated in build 52

             // this test is skipped if running with VM earlier than 52

             return;

        }

        VMOption option = findPrintGCDetailsOption();

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

            throw new RuntimeException("Unexpected value: " +

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

        }

        if (option.getOrigin() != Origin.VM_CREATION) {

            throw new RuntimeException("Unexpected origin: " +

                option.getOrigin() + " expected: VM_CREATION");

        }

        if (!option.isWriteable()) {

            throw new RuntimeException("Expected " + PRINT_GC_DETAILS +

                " to be writeable");

        }

        // set VM option to a new value

        mbean.setVMOption(PRINT_GC_DETAILS, NEW_VALUE);

        option = findPrintGCDetailsOption();

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

            throw new RuntimeException("Unexpected value: " +

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

        }

        if (option.getOrigin() != Origin.MANAGEMENT) {

            throw new RuntimeException("Unexpected origin: " +

                option.getOrigin() + " expected: MANAGEMENT");

        }

        VMOption o = mbean.getVMOption(PRINT_GC_DETAILS);

        if (!option.getValue().equals(o.getValue())) {

            throw new RuntimeException("Unmatched value: " +

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

        }

        if (!option.getValue().equals(o.getValue())) {

            throw new RuntimeException("Unmatched value: " +

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

        }

        if (option.getOrigin() != o.getOrigin()) {

            throw new RuntimeException("Unmatched origin: " +

                option.getOrigin() + " expected: " + o.getOrigin());

        }

        if (option.isWriteable() != o.isWriteable()) {

            throw new RuntimeException("Unmatched writeable: " +

                option.isWriteable() + " expected: " + o.isWriteable());

        }

        // check if ManagementServer is not writeable

        List<VMOption> options = mbean.getDiagnosticOptions();

        VMOption mgmtServerOption = null;

        for (VMOption o1 : options) {

            if (o1.getName().equals(MANAGEMENT_SERVER)) {

                 mgmtServerOption = o1;

                 break;

            }

        }

        if (mgmtServerOption != null) {

            throw new RuntimeException(MANAGEMENT_SERVER +

                " is not expected to be writeable");

        }

        mgmtServerOption = mbean.getVMOption(MANAGEMENT_SERVER);

        if (mgmtServerOption == null) {

            throw new RuntimeException(MANAGEMENT_SERVER +

                " should exist.");

        }

        if (mgmtServerOption.getOrigin() != Origin.DEFAULT) {

            throw new RuntimeException(MANAGEMENT_SERVER +

                " should have the default value.");

        }

        if (mgmtServerOption.isWriteable()) {

            throw new RuntimeException(MANAGEMENT_SERVER +

                " is not expected to be writeable");

        }

    }

    public static VMOption findPrintGCDetailsOption() {

        List<VMOption> options = mbean.getDiagnosticOptions();

        VMOption gcDetails = null;

        for (VMOption o : options) {

            if (o.getName().equals(PRINT_GC_DETAILS)) {

                 gcDetails = o;

                 break;

            }

        }

        if (gcDetails == null) {

            throw new RuntimeException("VM option " + PRINT_GC_DETAILS +

                " not found");

        }

        return gcDetails;

    }

}