/*

 * Copyright (c) 2005, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 6222826

 * @summary Test that tasks are cancelled properly when

 *          monitors are started and stopped in a loop.

 * @author Luis-Miguel Alventosa

 * @run clean StartStopTest

 * @run build StartStopTest

 * @run main/othervm/timeout=300 StartStopTest 1

 * @run main/othervm/timeout=300 StartStopTest 2

 * @run main/othervm/timeout=300 StartStopTest 3

 * @run main/othervm/timeout=300 -Djmx.x.monitor.maximum.pool.size=5 StartStopTest 1

 * @run main/othervm/timeout=300 -Djmx.x.monitor.maximum.pool.size=5 StartStopTest 2

 * @run main/othervm/timeout=300 -Djmx.x.monitor.maximum.pool.size=5 StartStopTest 3

 * @run main/othervm/timeout=300 -Djmx.x.monitor.maximum.pool.size=-5 StartStopTest 1

 * @run main/othervm/timeout=300 -Djmx.x.monitor.maximum.pool.size=-5 StartStopTest 2

 * @run main/othervm/timeout=300 -Djmx.x.monitor.maximum.pool.size=-5 StartStopTest 3

 */

import java.util.concurrent.atomic.AtomicInteger;

import javax.management.MBeanServer;

import javax.management.MBeanServerFactory;

import javax.management.Notification;

import javax.management.NotificationListener;

import javax.management.ObjectName;

import javax.management.monitor.CounterMonitor;

import javax.management.monitor.GaugeMonitor;

import javax.management.monitor.Monitor;

import javax.management.monitor.MonitorNotification;

import javax.management.monitor.StringMonitor;

public class StartStopTest {

    static int maxPoolSize;

    static final AtomicInteger counter = new AtomicInteger();

    // MBean class

    public class ObservedObject implements ObservedObjectMBean {

        public Integer getInteger() {

            task("Integer");

            return 0;

        }

        public Double getDouble() {

            task("Double");

            return 0.0;

        }

        public String getString() {

            task("String");

            return "";

        }

        private void task(String prop) {

            called = true;

            final int c = counter.incrementAndGet();

            echo("\tTASK [" + c + "] in get" + prop);

        }

    }

    // MBean interface

    public interface ObservedObjectMBean {

        public Integer getInteger();

        public Double getDouble();

        public String getString();

    }

    /**

     * Run test

     */

    public int runTest(int monitorType) throws Exception {

        int nTasks = maxPoolSize + 2;

        ObjectName[] mbeanNames = new ObjectName[nTasks];

        ObservedObject[] monitored = new ObservedObject[nTasks];

        ObjectName[] monitorNames = new ObjectName[nTasks];

        Monitor[] monitor = new Monitor[nTasks];

        String[] attributes = { "Integer", "Double", "String" };

        try {

            echo(">>> CREATE MBeanServer");

            MBeanServer server = MBeanServerFactory.newMBeanServer();

            String domain = server.getDefaultDomain();

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

                mbeanNames[i] =

                    new ObjectName(":type=ObservedObject,instance=" + (i + 1));

                monitored[i] = new ObservedObject();

                echo(">>> CREATE ObservedObject = " + mbeanNames[i].toString());

                server.registerMBean(monitored[i], mbeanNames[i]);

                switch (monitorType) {

                case 1:

                    monitorNames[i] = new ObjectName(":type=CounterMonitor," +

                                                     "instance=" + (i + 1));

                    monitor[i] = new CounterMonitor();

                    break;

                case 2:

                    monitorNames[i] = new ObjectName(":type=GaugeMonitor," +

                                                     "instance=" + (i + 1));

                    monitor[i] = new GaugeMonitor();

                    break;

                case 3:

                    monitorNames[i] = new ObjectName(":type=StringMonitor," +

                                                     "instance=" + (i + 1));

                    monitor[i] = new StringMonitor();

                    break;

                default:

                    echo("Unsupported monitor type");

                    return 1;

                }

                echo(">>> CREATE Monitor = " + monitorNames[i].toString());

                server.registerMBean(monitor[i], monitorNames[i]);

                monitor[i].addObservedObject(mbeanNames[i]);

                monitor[i].setObservedAttribute(attributes[monitorType-1]);

                monitor[i].setGranularityPeriod(50);

            }

            for (int j = 0; j < 2; j++) {

                echo(">>> Start MONITORS");

                for (int i = 0; i < nTasks; i++)

                    monitor[i].start();

                echo(">>> MONITORS started");

                echo(">>> Check FLAGS true");

                for (int i = 0; i < nTasks; i++)

                    if (!monitored[i].called) {

                        echo("KO: At least one attribute was not called");

                        return 1;

                    }

                echo(">>> FLAGS checked true");

                echo(">>> Stop MONITORS");

                for (int i = 0; i < nTasks; i++)

                    monitor[i].stop();

                echo(">>> MONITORS stopped");

                echo(">>> Set FLAGS to false");

                for (int i = 0; i < nTasks; i++)

                    monitored[i].called = false;

                echo(">>> FLAGS set to false");

                echo(">>> Check FLAGS remain false");

                for (int i = 0; i < nTasks; i++)

                    if (monitored[i].called) {

                        echo("KO: At least one attribute " +

                             "continued to get called");

                        return 1;

                    }

                echo(">>> FLAGS checked false");

            }

        } finally {

            for (int i = 0; i < nTasks; i++)

                if (monitor[i] != null)

                    monitor[i].stop();

        }

        return 0;

    }

    /*

     * Print message

     */

    private static void echo(String message) {

        System.out.println(message);

    }

    /*

     * Standalone entry point.

     *

     * Run the test and report to stdout.

     */

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

        Integer size = Integer.getInteger("jmx.x.monitor.maximum.pool.size");

        if (size == null) {

            maxPoolSize = 10;

            echo(">>> MAXIMUM POOL SIZE = 10 [default value]");

        } else {

            maxPoolSize = size.intValue() < 1 ? 1 : size.intValue();

            echo(">>> MAXIMUM POOL SIZE = " + maxPoolSize);

        }

        StartStopTest test = new StartStopTest();

        int error = test.runTest(Integer.parseInt(args[0]));

        if (error > 0) {

            echo(">>> Unhappy Bye, Bye!");

            throw new IllegalStateException(

                "Test FAILED: Unexpected Maximum Pool Size Overflow!");

        } else {

            echo(">>> Happy Bye, Bye!");

        }

    }

}