/*

 * 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 jdk.test.lib.Utils;

import java.lang.management.ManagementFactory;

import java.lang.management.MemoryNotificationInfo;

import java.lang.management.MemoryPoolMXBean;

import javax.management.ListenerNotFoundException;

import javax.management.Notification;

import javax.management.NotificationEmitter;

import javax.management.NotificationListener;

import sun.hotspot.code.BlobType;

/*

 * @test ThresholdNotificationsTest

 * @modules java.base/sun.misc

 *          java.management

 * @build ThresholdNotificationsTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *     sun.hotspot.WhiteBox$WhiteBoxPermission

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

 *     -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

 *     -XX:+SegmentedCodeCache -XX:CompileCommand=compileonly,null::*

 *     ThresholdNotificationsTest

 * @summary testing of getUsageThreshold()

 */

public class ThresholdNotificationsTest implements NotificationListener {

    private final static long WAIT_TIME = 10000L;

    private volatile long counter;

    private final BlobType btype;

    public static void main(String[] args) {

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

            new ThresholdNotificationsTest(bt).runTest();

        }

    }

    public ThresholdNotificationsTest(BlobType btype) {

        this.btype = btype;

        counter = 0L;

        CodeCacheUtils.disableCollectionUsageThresholds();

    }

    @Override

    public void handleNotification(Notification notification, Object handback) {

        String nType = notification.getType();

        String poolName

                = CodeCacheUtils.getPoolNameFromNotification(notification);

        // consider code cache events only

        if (CodeCacheUtils.isAvailableCodeHeapPoolName(poolName)) {

            Asserts.assertEQ(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED,

                    nType, "Unexpected event received: " + nType);

            if (poolName.equals(btype.getMemoryPool().getName())) {

                counter++;

            }

        }

    }

    protected void runTest() {

        int iterationsCount =

            Integer.getInteger("jdk.test.lib.iterations", 1);

        MemoryPoolMXBean bean = btype.getMemoryPool();

        ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).

                addNotificationListener(this, null, null);

        for (int i = 0; i < iterationsCount; i++) {

            CodeCacheUtils.hitUsageThreshold(bean, btype);

        }

        Asserts.assertTrue(

                Utils.waitForCondition(

                        () -> (CodeCacheUtils.isCodeHeapPredictable(btype) ?

                                (counter == iterationsCount) : (counter >= iterationsCount)),

                        WAIT_TIME),

                "Couldn't receive expected notifications count");

        try {

            ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).

                    removeNotificationListener(this);

        } catch (ListenerNotFoundException ex) {

            throw new AssertionError("Can't remove notification listener", ex);

        }

        System.out.printf("INFO: Scenario finished successfully for %s%n",

                bean.getName());

    }

}