/*

 * Copyright (c) 2014, 2015, 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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 */

import jdk.test.lib.Asserts;

import java.lang.management.ManagementFactory;

import java.lang.management.MemoryManagerMXBean;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Optional;

import sun.hotspot.code.BlobType;

/**

 * @test MemoryPoolsPresenceTest

 * @modules java.management

 * @build MemoryPoolsPresenceTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *     sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *     -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache MemoryPoolsPresenceTest

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *     -XX:+WhiteBoxAPI -XX:-SegmentedCodeCache MemoryPoolsPresenceTest

 * @summary verify that MemoryManagerMXBean exists for every code cache segment

 */

public class MemoryPoolsPresenceTest {

    private static final String CC_MANAGER = "CodeCacheManager";

    private final Map<String, Integer> counters = new HashMap<>();

    public static void main(String args[]) {

        new MemoryPoolsPresenceTest().runTest();

    }

    protected void runTest() {

        List<MemoryManagerMXBean> beans

                = ManagementFactory.getMemoryManagerMXBeans();

        Optional<MemoryManagerMXBean> any = beans

                .stream()

                .filter(bean -> CC_MANAGER.equals(bean.getName()))

                .findAny();

        Asserts.assertTrue(any.isPresent(), "Bean not found: " + CC_MANAGER);

        MemoryManagerMXBean ccManager = any.get();

        Asserts.assertNotNull(ccManager, "Found null for " + CC_MANAGER);

        String names[] = ccManager.getMemoryPoolNames();

        for (String name : names) {

            counters.put(name, counters.containsKey(name)

                    ? counters.get(name) + 1 : 1);

        }

        for (BlobType btype : BlobType.getAvailable()) {

            Asserts.assertEQ(counters.get(btype.getMemoryPool().getName()), 1,

                    "Found unexpected amount of beans for pool "

                    + btype.getMemoryPool().getName());

        }

        Asserts.assertEQ(BlobType.getAvailable().size(),

                counters.keySet().size(), "Unexpected amount of bean names");

    }

}