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

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 * accompanied this code).

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package jdk.jfr.api.consumer.streaming;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.atomic.AtomicBoolean;

import jdk.jfr.Event;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordingStream;

/**

 * @test

 * @summary Verifies that it is possible to start a stream when there are

 *          already chunk in the repository

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

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

 */

public class TestRecordingBefore {

    static class SnakeEvent extends Event {

        int id;

    }

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

        try (Recording r1 = new Recording()) {

            r1.start();

            emitSnakeEvent(1);

            emitSnakeEvent(2);

            emitSnakeEvent(3);

            // Force a chunk rotation

            try (Recording r2 = new Recording()) {

                r2.start();

                emitSnakeEvent(4);

                emitSnakeEvent(5);

                emitSnakeEvent(6);

                r2.stop();

            }

            r1.stop();

            // Two chunks should now exist in the repository

            AtomicBoolean fail = new AtomicBoolean(false);

            CountDownLatch lastEvent = new CountDownLatch(1);

            try (RecordingStream rs = new RecordingStream()) {

                rs.onEvent(e -> {

                    long id = e.getLong("id");

                    if (id < 7) {

                        System.out.println("Found unexpected id " + id);

                        fail.set(true);

                    }

                    if (id == 9) {

                        lastEvent.countDown();

                    }

                });

                rs.startAsync();

                emitSnakeEvent(7);

                emitSnakeEvent(8);

                emitSnakeEvent(9);

                lastEvent.await();

                if (fail.get()) {

                    throw new Exception("Found events from a previous recording");

                }

            }

        }

    }

    static void emitSnakeEvent(int id) {

        SnakeEvent e = new SnakeEvent();

        e.id = id;

        e.commit();

    }

}