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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

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 *

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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.streaming;

import java.util.concurrent.CountDownLatch;

import jdk.jfr.Event;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordingStream;

/**

 * @test

 * @summary Test that it is possible to iterate over chunk without normal events

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

 * @run main/othervm jdk.jfr.api.consumer.streaming.TestEmptyChunks

 */

public class TestEmptyChunks {

    static class EndEvent extends Event {

    }

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

        CountDownLatch end = new CountDownLatch(1);

        CountDownLatch firstFlush = new CountDownLatch(1);

        try (RecordingStream es = new RecordingStream()) {

            es.onEvent(EndEvent.class.getName(), e -> {

                end.countDown();

            });

            es.onFlush(() -> {

                firstFlush.countDown();

            });

            es.startAsync();

            System.out.println("Invoked startAsync()");

            // Wait for stream thread to start

            firstFlush.await();

            System.out.println("Stream thread active");

            Recording r1 = new Recording();

            r1.start();

            System.out.println("Chunk 1 started");

            Recording r2 = new Recording();

            r2.start();

            System.out.println("Chunk 2 started");

            Recording r3 = new Recording();

            r3.start();

            System.out.println("Chunk 3 started");

            r2.stop();

            System.out.println("Chunk 4 started");

            r3.stop();

            System.out.println("Chunk 5 started");

            EndEvent e = new EndEvent();

            e.commit();

            end.await();

            r1.stop();

            System.out.println("Chunk 5 ended");

            r1.close();

            r2.close();

            r3.close();

        }

    }

}