/*

 * Copyright (c) 2017, 2018, Red Hat, Inc. 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 TestMemoryPools

 * @key gc

 * @summary Test JMX memory pools

 * @modules java.base/jdk.internal.misc

 *          java.management

 */

import java.lang.management.*;

import java.util.*;

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

        List<MemoryManagerMXBean> mms = ManagementFactory.getMemoryManagerMXBeans();

        if (mms == null) {

            throw new RuntimeException("getMemoryManagerMXBeans is null");

        }

        if (mms.isEmpty()) {

            throw new RuntimeException("getMemoryManagerMXBeans is empty");

        }

        for (MemoryManagerMXBean mmBean : mms) {

            String[] names = mmBean.getMemoryPoolNames();

            if (names == null) {

                throw new RuntimeException("getMemoryPoolNames() is null");

            }

            if (names.length == 0) {

                throw new RuntimeException("getMemoryPoolNames() is empty");

            }

            for (String name : names) {

                if (name == null) {

                    throw new RuntimeException("pool name is null");

                }

                if (name.length() == 0) {

                    throw new RuntimeException("pool name is empty");

                }

            }

        }

    }

}