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

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

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * 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.consumer.recordingstream;

import java.util.List;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.atomic.AtomicBoolean;

import jdk.jfr.Event;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.jfr.consumer.RecordingStream;

import jdk.test.lib.jfr.Events;

/**

 * @test

 * @summary Tests that events are not emitted in handlers

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib /test/jdk

 * @build jdk.jfr.api.consumer.recordingstream.EventProducer

 * @run main/othervm jdk.jfr.api.consumer.recordingstream.TestRecursive

 */

public class TestRecursive {

    public static class NotRecorded extends Event {

    }

    public static class Recorded extends Event {

    }

    public static class Provoker extends Event {

    }

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

        testSync();

        testAsync();

        testStreamInStream();

    }

    private static void testStreamInStream() throws Exception {

        CountDownLatch latch = new CountDownLatch(1);

        try (Recording r = new Recording()) {

            r.start();

            Recorded r1 = new Recorded(); // 1

            r1.commit();

            try (RecordingStream rs = new RecordingStream()) {

                rs.onEvent(e1 -> {

                    streamInStream();

                    latch.countDown();

                });

                rs.startAsync();

                Recorded r2 = new Recorded(); // 2

                r2.commit();

                latch.await();

            }

            Recorded r3 = new Recorded(); // 2

            r3.commit();

            r.stop();

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

            if (count(events, NotRecorded.class) != 0) {

                throw new Exception("Expected 0 NotRecorded events");

            }

            if (count(events, Recorded.class) != 3) {

                throw new Exception("Expected 3 Recorded events");

            }

        }

    }

    // No events should be recorded in this method

    private static void streamInStream() {

        NotRecorded nr1 = new NotRecorded();

        nr1.commit();

        CountDownLatch latch = new CountDownLatch(1);

        try (RecordingStream rs2 = new RecordingStream()) {

            rs2.onEvent(e2 -> {

                NotRecorded nr2 = new NotRecorded();

                nr2.commit();

                latch.countDown();

            });

            NotRecorded nr3 = new NotRecorded();

            nr3.commit();

            rs2.startAsync();

            // run event in separate thread

            CompletableFuture.runAsync(() -> {

                Provoker p = new Provoker();

                p.commit();

            });

            try {

                latch.await();

            } catch (InterruptedException e) {

                throw new Error("Unexpected interruption", e);

            }

        }

        NotRecorded nr2 = new NotRecorded();

        nr2.commit();

    }

    private static void testSync() throws Exception {

        try (Recording r = new Recording()) {

            r.start();

            EventProducer p = new EventProducer();

            try (RecordingStream rs = new RecordingStream()) {

                Recorded e1 = new Recorded();

                e1.commit();

                rs.onEvent(e -> {

                    System.out.println("Emitting NotRecorded event");

                    NotRecorded event = new NotRecorded();

                    event.commit();

                    System.out.println("Stopping event provoker");

                    p.kill();

                    System.out.println("Closing recording stream");

                    rs.close();

                    return;

                });

                p.start();

                rs.start();

                Recorded e2 = new Recorded();

                e2.commit();

            }

            r.stop();

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

            System.out.println(events);

            if (count(events, NotRecorded.class) != 0) {

                throw new Exception("Expected 0 NotRecorded events");

            }

            if (count(events, Recorded.class) != 2) {

                throw new Exception("Expected 2 Recorded events");

            }

        }

    }

    private static int count(List<RecordedEvent> events, Class<?> eventClass) {

        int count = 0;

        for (RecordedEvent e : events) {

            if (e.getEventType().getName().equals(eventClass.getName())) {

                count++;

            }

        }

        System.out.println(count);

        return count;

    }

    private static void testAsync() throws InterruptedException, Exception {

        CountDownLatch latchOne = new CountDownLatch(1);

        CountDownLatch latchTwo = new CountDownLatch(2);

        AtomicBoolean fail = new AtomicBoolean();

        try (RecordingStream r = new RecordingStream()) {

            r.onEvent(e -> {

                System.out.println(e);

                NotRecorded event = new NotRecorded();

                event.commit();

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

                    latchOne.countDown();

                    latchTwo.countDown();

                }

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

                    fail.set(true);

                }

            });

            r.startAsync();

            Recorded e1 = new Recorded();

            e1.commit();

            latchOne.await();

            Recorded e2 = new Recorded();

            e2.commit();

            latchTwo.await();

            if (fail.get()) {

                throw new Exception("Unexpected event found");

            }

        }

    }

}