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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).

 *

 * You should have received a copy of the GNU General Public License version

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package jdk.jfr.event.runtime;

import java.util.concurrent.CountDownLatch;

import java.util.HashMap;

import java.util.Map;

import jdk.jfr.Event;

import jdk.jfr.FlightRecorder;

import jdk.jfr.Period;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordingStream;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.Asserts;

import jdk.test.lib.jfr.EventNames;

/**

 * @test

 * @summary Verifies at the metalevel that stream contents are written to ongoing recordings

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

 * @run main/othervm -Xlog:jfr+system+streaming=trace jdk.jfr.event.runtime.TestFlush

 */

public class TestFlush {

    private static boolean flushEventAck = false;

    @Period("2 s")

    static class ZebraEvent extends Event {

    }

    static class CatEvent extends Event {

    }

    static class DogEvent extends Event {

    }

    static class MouseEvent extends Event {

    }

    public static void main(String... args) throws InterruptedException {

        CountDownLatch dogLatch = new CountDownLatch(1);

        CountDownLatch catLatch = new CountDownLatch(1);

        CountDownLatch mouseLatch = new CountDownLatch(1);

        CountDownLatch zebraLatch = new CountDownLatch(3);

        FlightRecorder.addPeriodicEvent(ZebraEvent.class, () -> {

            ZebraEvent ze = new ZebraEvent();

            ze.commit();

        });

        try (RecordingStream rs = new RecordingStream()) {

            rs.enable(EventNames.Flush);

            rs.enable(EventNames.FlushStorage);

            rs.enable(EventNames.FlushStacktrace);

            rs.enable(EventNames.FlushStringPool);

            rs.enable(EventNames.FlushMetadata);

            rs.enable(EventNames.FlushTypeSet);

            rs.onEvent(e -> {

                switch (e.getEventType().getName()) {

                    case EventNames.Flush:

                        flushEventAck = true;

                    case EventNames.FlushStorage:

                    case EventNames.FlushStacktrace:

                    case EventNames.FlushStringPool:

                    case EventNames.FlushMetadata:

                    case EventNames.FlushTypeSet:

                        validateFlushEvent(e);

                        return;

                }

                if (e.getEventType().getName().equals(CatEvent.class.getName())) {

                    System.out.println("Found cat!");

                    catLatch.countDown();

                    return;

                }

                if (e.getEventType().getName().equals(DogEvent.class.getName())) {

                    System.out.println("Found dog!");

                    dogLatch.countDown();

                    return;

                }

                if (e.getEventType().getName().equals(ZebraEvent.class.getName())) {

                    System.out.println("Found zebra!");

                    zebraLatch.countDown();

                    return;

                }

                if (e.getEventType().getName().equals(MouseEvent.class.getName())) {

                    System.out.println("Found mouse!");

                    mouseLatch.countDown();

                    return;

                }

                System.out.println("Unexpected event: " + e.getEventType().getName());

            });

            rs.startAsync();

            try (Recording r1 = new Recording()) {

                r1.start();

                MouseEvent me = new MouseEvent();

                me.commit();

                System.out.println("Mouse emitted");

                mouseLatch.await();

                try (Recording r2 = new Recording()) { // force chunk rotation in stream

                    r2.start();

                    DogEvent de = new DogEvent();

                    de.commit();

                    System.out.println("Dog emitted");

                    dogLatch.await();

                    CatEvent ce = new CatEvent();

                    ce.commit();

                    System.out.println("Cat emitted");

                    catLatch.await();

                    zebraLatch.await();

                    acknowledgeFlushEvent();

                }

            }

        }

    }

    private static void printEvent(RecordedEvent re) {

        System.out.println(re.getEventType().getName());

        System.out.println(re.getStartTime().toEpochMilli());

        System.out.println(re.getEndTime().toEpochMilli());

    }

    private static void printFlushEvent(RecordedEvent re) {

        printEvent(re);

        System.out.println("flushID: " + (long) re.getValue("flushId"));

        System.out.println("elements: " + (long) re.getValue("elements"));

        System.out.println("size: " + (long) re.getValue("size"));

    }

    private static void validateFlushEvent(RecordedEvent re) {

        printFlushEvent(re);

        Asserts.assertTrue(re.getEventType().getName().contains("Flush"), "invalid Event type");

        Asserts.assertGT((long) re.getValue("flushId"), 0L, "Invalid flush ID");

        Asserts.assertGT((long) re.getValue("elements"), 0L, "No elements");

        Asserts.assertGT((long) re.getValue("size"), 0L, "Empty size");

    }

    private static void acknowledgeFlushEvent() {

        Asserts.assertTrue(flushEventAck, "No Flush event");

    }

}