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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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).

 *

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package jdk.jfr.api.event;

import java.time.Duration;

import java.util.ArrayList;

import java.util.List;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.Asserts;

import jdk.test.lib.jfr.CommonHelper;

import jdk.test.lib.jfr.EventNames;

import jdk.test.lib.jfr.Events;

import jdk.test.lib.jfr.SimpleEvent;

 * @test

 * @summary Test for RecordedEvent.getDuration()

 * @key jfr

 * @library /test/lib

 * @run main/othervm jdk.jfr.api.event.TestGetDuration

 */

public class TestGetDuration {

    private static final int DURATIONAL_EVENT_ID = 1;

    private static final int INSTANT_EVENT_ID = 2;

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

        verifyCustomEvents();

        verifyNativeEvents();

    }

    private static void verifyCustomEvents() throws Exception {

        boolean fastTimeEnabled = CommonHelper.hasFastTimeEnabled();

        System.out.println("Fast time enabled: " + fastTimeEnabled);

        Recording r = new Recording();

        r.enable(SimpleEvent.class).withoutStackTrace();

        r.enable(EventNames.CPUTimeStampCounter); // for debugging purposes

        r.start();

        SimpleEvent durational = new SimpleEvent();

        durational.begin();

        durational.id = DURATIONAL_EVENT_ID;

        if (!fastTimeEnabled) {

            // if we have a low resolution clock sleep until time changes

            CommonHelper.waitForSystemCurrentMillisToChange();

        }

        durational.end();

        durational.commit();

        SimpleEvent instant = new SimpleEvent();

        instant.id = INSTANT_EVENT_ID;

        instant.commit();

        r.stop();

        List<RecordedEvent> recordedEvents = Events.fromRecording(r);

        List<RecordedEvent> testEvents = new ArrayList<>();

        for (RecordedEvent e : recordedEvents) {

            System.out.println(e); // for debugging time related issues

            if (!e.getEventType().getName().equals(EventNames.CPUTimeStampCounter)) {

                testEvents.add(e);

            }

        }

        Events.hasEvents(testEvents);

        for (RecordedEvent re : testEvents) {

            int id = re.getValue("id");

            Asserts.assertEquals(re.getDuration(), Duration.between(re.getStartTime(), re.getEndTime()));

            switch (id) {

                case DURATIONAL_EVENT_ID:

                    Asserts.assertTrue(!re.getDuration().isNegative() && !re.getDuration().isZero());

                    break;

                case INSTANT_EVENT_ID:

                    Asserts.assertTrue(re.getDuration().isZero());

                    break;

            }

        }

    }

    private static void verifyNativeEvents() throws Exception {

        Recording r = new Recording();

        r.enable(EventNames.JVMInformation);

        r.enable(EventNames.ThreadSleep);

        r.start();

        // Should trigger a sleep event even if we

        // have a low resolution clock

        Thread.sleep(200);

        r.stop();

        List<RecordedEvent> recordedEvents = Events.fromRecording(r);

        Events.hasEvents(recordedEvents);

        for (RecordedEvent re : recordedEvents) {

            Asserts.assertEquals(re.getDuration(), Duration.between(re.getStartTime(), re.getEndTime()));

            switch (re.getEventType().getName()) {

                case EventNames.JVMInformation:

                    Asserts.assertTrue(re.getDuration().isZero());

                    break;

                case EventNames.ThreadSleep:

                    Asserts.assertTrue(!re.getDuration().isNegative() && !re.getDuration().isZero());

                    break;

                default:

                    Asserts.fail("Unexpected event: " + re);

                    break;

            }

        }

    }

}